GET https://kbin.spritesserver.nl/index.php/u/@Drich98@discuss.tchncs.de/commented

Response
200 OK
IP
216.73.216.19
Profiled on
Token
57d728

Security

Token

There is no security token.

Firewall

main Name
Security enabled
Stateless

Configuration

Key Value
provider security.user.provider.concrete.app_user_provider
context main
entry_point App\Security\KbinAuthenticator
user_checker App\Security\UserChecker
access_denied_handler (none)
access_denied_url (none)
authenticators 
[
  "two_factor"
  "remember_me"
  "App\Security\KbinAuthenticator"
  "App\Security\FacebookAuthenticator"
  "App\Security\GoogleAuthenticator"
  "App\Security\GithubAuthenticator"
  "App\Security\KeycloakAuthenticator"
]

Listeners

Listener Duration Response 
Symfony\Component\Security\Http\Firewall\ChannelListener {#723
  -map: Symfony\Component\Security\Http\AccessMap {#722 …}
  -logger: Monolog\Logger {#783 …}
  -httpPort: 80
  -httpsPort: 443
}
 0.00 ms (none) 
Symfony\Component\Security\Http\Firewall\ContextListener {#706
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage {#1017 …}
  -sessionKey: "_security_main"
  -logger: Monolog\Logger {#783 …}
  -userProviders: Symfony\Component\DependencyInjection\Argument\RewindableGenerator {#705 …}
  -dispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}
  -registered: false
  -trustResolver: Scheb\TwoFactorBundle\Security\Authentication\AuthenticationTrustResolver {#780 …}
  -sessionTrackerEnabler: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage::enableUsageTracking(): void {#703 …}
}
 10.31 ms (none) 
Symfony\Component\Security\Http\Firewall\AuthenticatorManagerListener {#584
  -authenticatorManager: Symfony\Component\Security\Http\Authentication\AuthenticatorManager {#595 …}
}
 0.00 ms (none) 
Scheb\TwoFactorBundle\Security\Http\Firewall\TwoFactorAccessListener {#582
  -twoFactorFirewallConfig: Scheb\TwoFactorBundle\Security\TwoFactor\TwoFactorFirewallConfig {#842 …}
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -twoFactorAccessDecider: Scheb\TwoFactorBundle\Security\Authorization\TwoFactorAccessDecider {#581 …}
}
 0.04 ms (none) 
Symfony\Component\Security\Http\Firewall\AccessListener {#579
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -accessDecisionManager: Symfony\Component\Security\Core\Authorization\TraceableAccessDecisionManager {#937 …}
  -map: Symfony\Component\Security\Http\AccessMap {#722 …}
}
 0.00 ms (none) 
Symfony\Component\Security\Http\Firewall\LogoutListener {#786
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -options: [
    "csrf_parameter" => "_csrf_token"
    "csrf_token_id" => "logout"
    "logout_path" => "app_logout"
  ]
  -httpUtils: Symfony\Component\Security\Http\HttpUtils {#841 …}
  -csrfTokenManager: Symfony\Component\Security\Csrf\CsrfTokenManager {#1015 …}
  -eventDispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}
}
 0.00 ms (none)

Authenticators

No authenticators have been recorded. Check previous profiles on your authentication endpoint.

Access Decision

affirmative Strategy
# Voter class
1 
"Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter"
2 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
3 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
4 
"Symfony\Component\Security\Core\Authorization\Voter\ExpressionVoter"
5 
"App\Security\Voter\EntryCommentVoter"
6 
"App\Security\Voter\EntryVoter"
7 
"App\Security\Voter\MagazineVoter"
8 
"App\Security\Voter\MessageThreadVoter"
9 
"App\Security\Voter\MessageVoter"
10 
"App\Security\Voter\NotificationVoter"
11 
"App\Security\Voter\OAuth2UserConsentVoter"
12 
"App\Security\Voter\PostCommentVoter"
13 
"App\Security\Voter\PostVoter"
14 
"App\Security\Voter\UserVoter"

Access decision log

# Result Attributes Object
1 DENIED ROLE_USER 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
2 DENIED moderate 
App\Entity\Entry {#1434
  +user: App\Entity\User {#260 …}
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: Proxies\__CG__\App\Entity\Image {#1676 …}
  +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
  +slug: "Non-Inverting-LM358-Circuit-Not-Working"
  +title: "Non-Inverting LM358 Circuit Not Working"
  +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
  +body: """
    Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
    \n
    Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
    \n
    My questions are as follows:\n
    \n
    1. Is the ground for the voltage rail and input signal the same?\n
    2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
    3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
    """
  +type: "image"
  +lang: "en"
  +isOc: false
  +hasEmbed: true
  +commentCount: 13
  +favouriteCount: 6
  +score: 0
  +isAdult: false
  +sticky: false
  +lastActive: DateTime @1689094862 {#1445
    date: 2023-07-11 19:01:02.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1663 …}
  +votes: Doctrine\ORM\PersistentCollection {#1590 …}
  +reports: Doctrine\ORM\PersistentCollection {#1614 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
  +badges: Doctrine\ORM\PersistentCollection {#1562 …}
  +children: [
    4 => App\Entity\EntryComment {#1630
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
      +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688154450 {#1620
        date: 2023-06-30 21:47:30.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@Susan_B_Good@discuss.tchncs.de"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1707 …}
      +nested: Doctrine\ORM\PersistentCollection {#1739 …}
      +votes: Doctrine\ORM\PersistentCollection {#1716 …}
      +reports: Doctrine\ORM\PersistentCollection {#1718 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
      +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
      -id: 6103
      -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/497248"
      +editedAt: DateTimeImmutable @1688154803 {#1558
        date: 2023-06-30 21:53:23.0 +02:00
      }
      +createdAt: DateTimeImmutable @1688154450 {#1554
        date: 2023-06-30 21:47:30.0 +02:00
      }
      +"title": 6103
    }
    3 => App\Entity\EntryComment {#2470
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
      +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688154877 {#1597
        date: 2023-06-30 21:54:37.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@grasib@lemmy.world"
      ]
      +children: Doctrine\ORM\PersistentCollection {#2457 …}
      +nested: Doctrine\ORM\PersistentCollection {#2469 …}
      +votes: Doctrine\ORM\PersistentCollection {#2471 …}
      +reports: Doctrine\ORM\PersistentCollection {#2363 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
      +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
      -id: 6104
      -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/497352"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688154877 {#2468
        date: 2023-06-30 21:54:37.0 +02:00
      }
      +"title": 6104
    }
    1 => App\Entity\EntryComment {#1908
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688333159 {#1410
        date: 2023-07-02 23:25:59.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@0x4E4F@lemmy.fmhy.ml"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1883 …}
      +nested: Doctrine\ORM\PersistentCollection {#2389 …}
      +votes: Doctrine\ORM\PersistentCollection {#2387 …}
      +reports: Doctrine\ORM\PersistentCollection {#2394 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
      +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
      -id: 7162
      -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/557569"
      +editedAt: DateTimeImmutable @1688335162 {#1874
        date: 2023-07-02 23:59:22.0 +02:00
      }
      +createdAt: DateTimeImmutable @1688333159 {#1907
        date: 2023-07-02 23:25:59.0 +02:00
      }
      +"title": 7162
    }
    2 => App\Entity\EntryComment {#2380
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688155219 {#2364
        date: 2023-06-30 22:00:19.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@0x4E4F@lemmy.fmhy.ml"
      ]
      +children: Doctrine\ORM\PersistentCollection {#2382 …}
      +nested: Doctrine\ORM\PersistentCollection {#2384 …}
      +votes: Doctrine\ORM\PersistentCollection {#2379 …}
      +reports: Doctrine\ORM\PersistentCollection {#2383 …}
      +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
      +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
      -id: 6107
      -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/497439"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688155219 {#2372
        date: 2023-06-30 22:00:19.0 +02:00
      }
      +"title": 6107
    }
    0 => App\Entity\EntryComment {#1385
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688335254 {#1402
        date: 2023-07-03 00:00:54.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@0x4E4F@lemmy.fmhy.ml"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1401 …}
      +nested: Doctrine\ORM\PersistentCollection {#1363 …}
      +votes: Doctrine\ORM\PersistentCollection {#1362 …}
      +reports: Doctrine\ORM\PersistentCollection {#2019 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
      +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
      -id: 7172
      -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/558794"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688335254 {#1405
        date: 2023-07-03 00:00:54.0 +02:00
      }
      +"title": 7172
    }
  ]
  -id: 526
  -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
  -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
  +cross: false
  +upVotes: 0
  +downVotes: 0
  +ranking: 1688103034
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/post/372756"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688045034 {#1642
    date: 2023-06-29 15:23:54.0 +02:00
  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS DENIED 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
3 DENIED edit 
App\Entity\Entry {#1434
  +user: App\Entity\User {#260 …}
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: Proxies\__CG__\App\Entity\Image {#1676 …}
  +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
  +slug: "Non-Inverting-LM358-Circuit-Not-Working"
  +title: "Non-Inverting LM358 Circuit Not Working"
  +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
  +body: """
    Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
    \n
    Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
    \n
    My questions are as follows:\n
    \n
    1. Is the ground for the voltage rail and input signal the same?\n
    2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
    3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
    """
  +type: "image"
  +lang: "en"
  +isOc: false
  +hasEmbed: true
  +commentCount: 13
  +favouriteCount: 6
  +score: 0
  +isAdult: false
  +sticky: false
  +lastActive: DateTime @1689094862 {#1445
    date: 2023-07-11 19:01:02.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1663 …}
  +votes: Doctrine\ORM\PersistentCollection {#1590 …}
  +reports: Doctrine\ORM\PersistentCollection {#1614 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
  +badges: Doctrine\ORM\PersistentCollection {#1562 …}
  +children: [
    4 => App\Entity\EntryComment {#1630
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
      +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688154450 {#1620
        date: 2023-06-30 21:47:30.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@Susan_B_Good@discuss.tchncs.de"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1707 …}
      +nested: Doctrine\ORM\PersistentCollection {#1739 …}
      +votes: Doctrine\ORM\PersistentCollection {#1716 …}
      +reports: Doctrine\ORM\PersistentCollection {#1718 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
      +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
      -id: 6103
      -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/497248"
      +editedAt: DateTimeImmutable @1688154803 {#1558
        date: 2023-06-30 21:53:23.0 +02:00
      }
      +createdAt: DateTimeImmutable @1688154450 {#1554
        date: 2023-06-30 21:47:30.0 +02:00
      }
      +"title": 6103
    }
    3 => App\Entity\EntryComment {#2470
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
      +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688154877 {#1597
        date: 2023-06-30 21:54:37.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@grasib@lemmy.world"
      ]
      +children: Doctrine\ORM\PersistentCollection {#2457 …}
      +nested: Doctrine\ORM\PersistentCollection {#2469 …}
      +votes: Doctrine\ORM\PersistentCollection {#2471 …}
      +reports: Doctrine\ORM\PersistentCollection {#2363 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
      +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
      -id: 6104
      -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/497352"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688154877 {#2468
        date: 2023-06-30 21:54:37.0 +02:00
      }
      +"title": 6104
    }
    1 => App\Entity\EntryComment {#1908
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688333159 {#1410
        date: 2023-07-02 23:25:59.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@0x4E4F@lemmy.fmhy.ml"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1883 …}
      +nested: Doctrine\ORM\PersistentCollection {#2389 …}
      +votes: Doctrine\ORM\PersistentCollection {#2387 …}
      +reports: Doctrine\ORM\PersistentCollection {#2394 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
      +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
      -id: 7162
      -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/557569"
      +editedAt: DateTimeImmutable @1688335162 {#1874
        date: 2023-07-02 23:59:22.0 +02:00
      }
      +createdAt: DateTimeImmutable @1688333159 {#1907
        date: 2023-07-02 23:25:59.0 +02:00
      }
      +"title": 7162
    }
    2 => App\Entity\EntryComment {#2380
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688155219 {#2364
        date: 2023-06-30 22:00:19.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@0x4E4F@lemmy.fmhy.ml"
      ]
      +children: Doctrine\ORM\PersistentCollection {#2382 …}
      +nested: Doctrine\ORM\PersistentCollection {#2384 …}
      +votes: Doctrine\ORM\PersistentCollection {#2379 …}
      +reports: Doctrine\ORM\PersistentCollection {#2383 …}
      +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
      +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
      -id: 6107
      -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/497439"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688155219 {#2372
        date: 2023-06-30 22:00:19.0 +02:00
      }
      +"title": 6107
    }
    0 => App\Entity\EntryComment {#1385
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688335254 {#1402
        date: 2023-07-03 00:00:54.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@0x4E4F@lemmy.fmhy.ml"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1401 …}
      +nested: Doctrine\ORM\PersistentCollection {#1363 …}
      +votes: Doctrine\ORM\PersistentCollection {#1362 …}
      +reports: Doctrine\ORM\PersistentCollection {#2019 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
      +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
      -id: 7172
      -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/558794"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688335254 {#1405
        date: 2023-07-03 00:00:54.0 +02:00
      }
      +"title": 7172
    }
  ]
  -id: 526
  -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
  -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
  +cross: false
  +upVotes: 0
  +downVotes: 0
  +ranking: 1688103034
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/post/372756"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688045034 {#1642
    date: 2023-06-29 15:23:54.0 +02:00
  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS DENIED 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
4 DENIED moderate 
App\Entity\Entry {#1434
  +user: App\Entity\User {#260 …}
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: Proxies\__CG__\App\Entity\Image {#1676 …}
  +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
  +slug: "Non-Inverting-LM358-Circuit-Not-Working"
  +title: "Non-Inverting LM358 Circuit Not Working"
  +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
  +body: """
    Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
    \n
    Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
    \n
    My questions are as follows:\n
    \n
    1. Is the ground for the voltage rail and input signal the same?\n
    2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
    3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
    """
  +type: "image"
  +lang: "en"
  +isOc: false
  +hasEmbed: true
  +commentCount: 13
  +favouriteCount: 6
  +score: 0
  +isAdult: false
  +sticky: false
  +lastActive: DateTime @1689094862 {#1445
    date: 2023-07-11 19:01:02.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1663 …}
  +votes: Doctrine\ORM\PersistentCollection {#1590 …}
  +reports: Doctrine\ORM\PersistentCollection {#1614 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
  +badges: Doctrine\ORM\PersistentCollection {#1562 …}
  +children: [
    4 => App\Entity\EntryComment {#1630
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
      +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688154450 {#1620
        date: 2023-06-30 21:47:30.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@Susan_B_Good@discuss.tchncs.de"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1707 …}
      +nested: Doctrine\ORM\PersistentCollection {#1739 …}
      +votes: Doctrine\ORM\PersistentCollection {#1716 …}
      +reports: Doctrine\ORM\PersistentCollection {#1718 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
      +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
      -id: 6103
      -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/497248"
      +editedAt: DateTimeImmutable @1688154803 {#1558
        date: 2023-06-30 21:53:23.0 +02:00
      }
      +createdAt: DateTimeImmutable @1688154450 {#1554
        date: 2023-06-30 21:47:30.0 +02:00
      }
      +"title": 6103
    }
    3 => App\Entity\EntryComment {#2470
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
      +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688154877 {#1597
        date: 2023-06-30 21:54:37.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@grasib@lemmy.world"
      ]
      +children: Doctrine\ORM\PersistentCollection {#2457 …}
      +nested: Doctrine\ORM\PersistentCollection {#2469 …}
      +votes: Doctrine\ORM\PersistentCollection {#2471 …}
      +reports: Doctrine\ORM\PersistentCollection {#2363 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
      +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
      -id: 6104
      -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/497352"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688154877 {#2468
        date: 2023-06-30 21:54:37.0 +02:00
      }
      +"title": 6104
    }
    1 => App\Entity\EntryComment {#1908
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688333159 {#1410
        date: 2023-07-02 23:25:59.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@0x4E4F@lemmy.fmhy.ml"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1883 …}
      +nested: Doctrine\ORM\PersistentCollection {#2389 …}
      +votes: Doctrine\ORM\PersistentCollection {#2387 …}
      +reports: Doctrine\ORM\PersistentCollection {#2394 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
      +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
      -id: 7162
      -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/557569"
      +editedAt: DateTimeImmutable @1688335162 {#1874
        date: 2023-07-02 23:59:22.0 +02:00
      }
      +createdAt: DateTimeImmutable @1688333159 {#1907
        date: 2023-07-02 23:25:59.0 +02:00
      }
      +"title": 7162
    }
    2 => App\Entity\EntryComment {#2380
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688155219 {#2364
        date: 2023-06-30 22:00:19.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@0x4E4F@lemmy.fmhy.ml"
      ]
      +children: Doctrine\ORM\PersistentCollection {#2382 …}
      +nested: Doctrine\ORM\PersistentCollection {#2384 …}
      +votes: Doctrine\ORM\PersistentCollection {#2379 …}
      +reports: Doctrine\ORM\PersistentCollection {#2383 …}
      +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
      +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
      -id: 6107
      -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/497439"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688155219 {#2372
        date: 2023-06-30 22:00:19.0 +02:00
      }
      +"title": 6107
    }
    0 => App\Entity\EntryComment {#1385
      +user: App\Entity\User {#260 …}
      +entry: App\Entity\Entry {#1434}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
      +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
      +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
      +lang: "en"
      +isAdult: false
      +favouriteCount: 0
      +score: 0
      +lastActive: DateTime @1688335254 {#1402
        date: 2023-07-03 00:00:54.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@0x4E4F@lemmy.fmhy.ml"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1401 …}
      +nested: Doctrine\ORM\PersistentCollection {#1363 …}
      +votes: Doctrine\ORM\PersistentCollection {#1362 …}
      +reports: Doctrine\ORM\PersistentCollection {#2019 …}
      +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
      +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
      -id: 7172
      -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/558794"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688335254 {#1405
        date: 2023-07-03 00:00:54.0 +02:00
      }
      +"title": 7172
    }
  ]
  -id: 526
  -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
  -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
  +cross: false
  +upVotes: 0
  +downVotes: 0
  +ranking: 1688103034
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/post/372756"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688045034 {#1642
    date: 2023-06-29 15:23:54.0 +02:00
  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS DENIED 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
5 DENIED ROLE_USER 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
6 DENIED moderate 
App\Entity\EntryComment {#1630
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630}
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
  +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688154450 {#1620
    date: 2023-06-30 21:47:30.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@Susan_B_Good@discuss.tchncs.de"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1707 …}
  +nested: Doctrine\ORM\PersistentCollection {#1739 …}
  +votes: Doctrine\ORM\PersistentCollection {#1716 …}
  +reports: Doctrine\ORM\PersistentCollection {#1718 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
  -id: 6103
  -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/497248"
  +editedAt: DateTimeImmutable @1688154803 {#1558
    date: 2023-06-30 21:53:23.0 +02:00
  }
  +createdAt: DateTimeImmutable @1688154450 {#1554
    date: 2023-06-30 21:47:30.0 +02:00
  }
  +"title": 6103
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
7 DENIED edit 
App\Entity\EntryComment {#1630
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630}
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
  +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688154450 {#1620
    date: 2023-06-30 21:47:30.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@Susan_B_Good@discuss.tchncs.de"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1707 …}
  +nested: Doctrine\ORM\PersistentCollection {#1739 …}
  +votes: Doctrine\ORM\PersistentCollection {#1716 …}
  +reports: Doctrine\ORM\PersistentCollection {#1718 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
  -id: 6103
  -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/497248"
  +editedAt: DateTimeImmutable @1688154803 {#1558
    date: 2023-06-30 21:53:23.0 +02:00
  }
  +createdAt: DateTimeImmutable @1688154450 {#1554
    date: 2023-06-30 21:47:30.0 +02:00
  }
  +"title": 6103
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
8 DENIED moderate 
App\Entity\EntryComment {#1630
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630}
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
  +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688154450 {#1620
    date: 2023-06-30 21:47:30.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@Susan_B_Good@discuss.tchncs.de"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1707 …}
  +nested: Doctrine\ORM\PersistentCollection {#1739 …}
  +votes: Doctrine\ORM\PersistentCollection {#1716 …}
  +reports: Doctrine\ORM\PersistentCollection {#1718 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
  -id: 6103
  -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/497248"
  +editedAt: DateTimeImmutable @1688154803 {#1558
    date: 2023-06-30 21:53:23.0 +02:00
  }
  +createdAt: DateTimeImmutable @1688154450 {#1554
    date: 2023-06-30 21:47:30.0 +02:00
  }
  +"title": 6103
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
9 DENIED ROLE_USER 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
10 DENIED moderate 
App\Entity\EntryComment {#2470
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470}
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
  +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688154877 {#1597
    date: 2023-06-30 21:54:37.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@grasib@lemmy.world"
  ]
  +children: Doctrine\ORM\PersistentCollection {#2457 …}
  +nested: Doctrine\ORM\PersistentCollection {#2469 …}
  +votes: Doctrine\ORM\PersistentCollection {#2471 …}
  +reports: Doctrine\ORM\PersistentCollection {#2363 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
  -id: 6104
  -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/497352"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688154877 {#2468
    date: 2023-06-30 21:54:37.0 +02:00
  }
  +"title": 6104
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
11 DENIED edit 
App\Entity\EntryComment {#2470
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470}
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
  +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688154877 {#1597
    date: 2023-06-30 21:54:37.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@grasib@lemmy.world"
  ]
  +children: Doctrine\ORM\PersistentCollection {#2457 …}
  +nested: Doctrine\ORM\PersistentCollection {#2469 …}
  +votes: Doctrine\ORM\PersistentCollection {#2471 …}
  +reports: Doctrine\ORM\PersistentCollection {#2363 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
  -id: 6104
  -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/497352"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688154877 {#2468
    date: 2023-06-30 21:54:37.0 +02:00
  }
  +"title": 6104
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
12 DENIED moderate 
App\Entity\EntryComment {#2470
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470}
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
  +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688154877 {#1597
    date: 2023-06-30 21:54:37.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@grasib@lemmy.world"
  ]
  +children: Doctrine\ORM\PersistentCollection {#2457 …}
  +nested: Doctrine\ORM\PersistentCollection {#2469 …}
  +votes: Doctrine\ORM\PersistentCollection {#2471 …}
  +reports: Doctrine\ORM\PersistentCollection {#2363 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
  -id: 6104
  -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/497352"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688154877 {#2468
    date: 2023-06-30 21:54:37.0 +02:00
  }
  +"title": 6104
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
13 DENIED ROLE_USER 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
14 DENIED moderate 
App\Entity\EntryComment {#1908
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908}
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688333159 {#1410
    date: 2023-07-02 23:25:59.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@0x4E4F@lemmy.fmhy.ml"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1883 …}
  +nested: Doctrine\ORM\PersistentCollection {#2389 …}
  +votes: Doctrine\ORM\PersistentCollection {#2387 …}
  +reports: Doctrine\ORM\PersistentCollection {#2394 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
  -id: 7162
  -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/557569"
  +editedAt: DateTimeImmutable @1688335162 {#1874
    date: 2023-07-02 23:59:22.0 +02:00
  }
  +createdAt: DateTimeImmutable @1688333159 {#1907
    date: 2023-07-02 23:25:59.0 +02:00
  }
  +"title": 7162
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
15 DENIED edit 
App\Entity\EntryComment {#1908
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908}
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688333159 {#1410
    date: 2023-07-02 23:25:59.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@0x4E4F@lemmy.fmhy.ml"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1883 …}
  +nested: Doctrine\ORM\PersistentCollection {#2389 …}
  +votes: Doctrine\ORM\PersistentCollection {#2387 …}
  +reports: Doctrine\ORM\PersistentCollection {#2394 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
  -id: 7162
  -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/557569"
  +editedAt: DateTimeImmutable @1688335162 {#1874
    date: 2023-07-02 23:59:22.0 +02:00
  }
  +createdAt: DateTimeImmutable @1688333159 {#1907
    date: 2023-07-02 23:25:59.0 +02:00
  }
  +"title": 7162
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
16 DENIED moderate 
App\Entity\EntryComment {#1908
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908}
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688333159 {#1410
    date: 2023-07-02 23:25:59.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@0x4E4F@lemmy.fmhy.ml"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1883 …}
  +nested: Doctrine\ORM\PersistentCollection {#2389 …}
  +votes: Doctrine\ORM\PersistentCollection {#2387 …}
  +reports: Doctrine\ORM\PersistentCollection {#2394 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
  -id: 7162
  -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/557569"
  +editedAt: DateTimeImmutable @1688335162 {#1874
    date: 2023-07-02 23:59:22.0 +02:00
  }
  +createdAt: DateTimeImmutable @1688333159 {#1907
    date: 2023-07-02 23:25:59.0 +02:00
  }
  +"title": 7162
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
17 DENIED ROLE_USER 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
18 DENIED moderate 
App\Entity\EntryComment {#2380
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380}
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688155219 {#2364
    date: 2023-06-30 22:00:19.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@0x4E4F@lemmy.fmhy.ml"
  ]
  +children: Doctrine\ORM\PersistentCollection {#2382 …}
  +nested: Doctrine\ORM\PersistentCollection {#2384 …}
  +votes: Doctrine\ORM\PersistentCollection {#2379 …}
  +reports: Doctrine\ORM\PersistentCollection {#2383 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
  -id: 6107
  -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/497439"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688155219 {#2372
    date: 2023-06-30 22:00:19.0 +02:00
  }
  +"title": 6107
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
19 DENIED edit 
App\Entity\EntryComment {#2380
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380}
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688155219 {#2364
    date: 2023-06-30 22:00:19.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@0x4E4F@lemmy.fmhy.ml"
  ]
  +children: Doctrine\ORM\PersistentCollection {#2382 …}
  +nested: Doctrine\ORM\PersistentCollection {#2384 …}
  +votes: Doctrine\ORM\PersistentCollection {#2379 …}
  +reports: Doctrine\ORM\PersistentCollection {#2383 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
  -id: 6107
  -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/497439"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688155219 {#2372
    date: 2023-06-30 22:00:19.0 +02:00
  }
  +"title": 6107
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
20 DENIED moderate 
App\Entity\EntryComment {#2380
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380}
      0 => App\Entity\EntryComment {#1385
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688335254 {#1402
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1401 …}
        +nested: Doctrine\ORM\PersistentCollection {#1363 …}
        +votes: Doctrine\ORM\PersistentCollection {#1362 …}
        +reports: Doctrine\ORM\PersistentCollection {#2019 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
        -id: 7172
        -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/558794"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688335254 {#1405
          date: 2023-07-03 00:00:54.0 +02:00
        }
        +"title": 7172
      }
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688155219 {#2364
    date: 2023-06-30 22:00:19.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@0x4E4F@lemmy.fmhy.ml"
  ]
  +children: Doctrine\ORM\PersistentCollection {#2382 …}
  +nested: Doctrine\ORM\PersistentCollection {#2384 …}
  +votes: Doctrine\ORM\PersistentCollection {#2379 …}
  +reports: Doctrine\ORM\PersistentCollection {#2383 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
  -id: 6107
  -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/497439"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688155219 {#2372
    date: 2023-06-30 22:00:19.0 +02:00
  }
  +"title": 6107
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
21 DENIED ROLE_USER 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
22 DENIED moderate 
App\Entity\EntryComment {#1385
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385}
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688335254 {#1402
    date: 2023-07-03 00:00:54.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@0x4E4F@lemmy.fmhy.ml"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1401 …}
  +nested: Doctrine\ORM\PersistentCollection {#1363 …}
  +votes: Doctrine\ORM\PersistentCollection {#1362 …}
  +reports: Doctrine\ORM\PersistentCollection {#2019 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
  -id: 7172
  -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/558794"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688335254 {#1405
    date: 2023-07-03 00:00:54.0 +02:00
  }
  +"title": 7172
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
23 DENIED edit 
App\Entity\EntryComment {#1385
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385}
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688335254 {#1402
    date: 2023-07-03 00:00:54.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@0x4E4F@lemmy.fmhy.ml"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1401 …}
  +nested: Doctrine\ORM\PersistentCollection {#1363 …}
  +votes: Doctrine\ORM\PersistentCollection {#1362 …}
  +reports: Doctrine\ORM\PersistentCollection {#2019 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
  -id: 7172
  -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/558794"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688335254 {#1405
    date: 2023-07-03 00:00:54.0 +02:00
  }
  +"title": 7172
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
24 DENIED moderate 
App\Entity\EntryComment {#1385
  +user: App\Entity\User {#260 …}
  +entry: App\Entity\Entry {#1434
    +user: App\Entity\User {#260 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
    +image: Proxies\__CG__\App\Entity\Image {#1676 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#1662 …}
    +slug: "Non-Inverting-LM358-Circuit-Not-Working"
    +title: "Non-Inverting LM358 Circuit Not Working"
    +url: "https://discuss.tchncs.de/pictrs/image/4e44ba5a-c8c2-485d-a6cf-9a89d2fd9670.jpeg"
    +body: """
      Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification.\n
      \n
      Currently I am attempting to build an LM358 Non-Inverting Op Amp. I am using my power supply for a +/- 12V rail, and my Arduino Uno for my 5V supply at the V+ input pin. I have chosen two 1k resistors to amplify the signal to 10V at the output and put and led as a indication that the circuit is working.\n
      \n
      My questions are as follows:\n
      \n
      1. Is the ground for the voltage rail and input signal the same?\n
      2. What exactly is wrong with the circuit I built? I want the LED to only turn on when 5V is supplied at the input, right now the LED can turn on if I connect the ground to the voltage rail supply even without an input voltage.\n
      3. I’ve seen the post on Adafruit with the feedback resistors connected to the same ground as the rail supply, but the circuit diagram does not show where the input voltage ground is? Link: [blog.adafruit.com/…/ask-an-educator-making-a-non-…](https://blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)
      """
    +type: "image"
    +lang: "en"
    +isOc: false
    +hasEmbed: true
    +commentCount: 13
    +favouriteCount: 6
    +score: 0
    +isAdult: false
    +sticky: false
    +lastActive: DateTime @1689094862 {#1445
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1663 …}
    +votes: Doctrine\ORM\PersistentCollection {#1590 …}
    +reports: Doctrine\ORM\PersistentCollection {#1614 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1568 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1576 …}
    +badges: Doctrine\ORM\PersistentCollection {#1562 …}
    +children: [
      4 => App\Entity\EntryComment {#1630
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2465 …}
        +body: "I understand your caution, however I understand the theory behind OP-Amps, theory can only go so far which is why I’m building a circuit on a breadboard now. I should clarify that the basic rules for ideal op-amps I have a grasp of, although I can never seem to remember these rules. For example, I have the formulas for a BJT and MOSFET transistors memorized because I spent a lot of time reading and using them in practical applications. Op-amps I have spent a lot of time reading but no time building circuits, which is essentially what I am trying to do now. I have a degree in EE, and at this point this is one of the basic components that wasn’t covered much in university, nor did reading or doing practice problems help. I’m very much a hands on learner, I can read formulas and equations all day but if I don’t apply what I learned I’ll forget it after several days unless I repeatedly practice."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154450 {#1620
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1707 …}
        +nested: Doctrine\ORM\PersistentCollection {#1739 …}
        +votes: Doctrine\ORM\PersistentCollection {#1716 …}
        +reports: Doctrine\ORM\PersistentCollection {#1718 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2462 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2448 …}
        -id: 6103
        -bodyTs: "'although':49 'amp':13,43,87 'appli':164 'applic':84 'basic':37,126 'behind':10 'bjt':66 'breadboard':30 'build':25,99 'caution':4 'circuit':27,100 'clarifi':34 'compon':127 'cover':131 'day':158,174 'degre':114 'ee':116 'equat':156 'essenti':103 'exampl':59 'far':19 'forget':170 'formula':63,154 'go':17 'grasp':47 'hand':148 'help':142 'howev':5 'ideal':40 'learn':167 'learner':150 'll':169 'lot':75,92 'm':24,144 'memor':70 'mosfet':68 'much':132,146 'never':52 'one':123 'op':12,42,86 'op-amp':11,41,85 'point':120 'practic':83,140,178 'problem':141 'read':78,95,137,153 'rememb':55 'repeat':177 'rule':38,57 'seem':53 'sever':173 'spent':73,90 'theori':9,14 'time':77,94,98 'transistor':69 'tri':107 'understand':2,7 'univers':134 'unless':175 'use':80 'wasn':129"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497248"
        +editedAt: DateTimeImmutable @1688154803 {#1558
          date: 2023-06-30 21:53:23.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688154450 {#1554
          date: 2023-06-30 21:47:30.0 +02:00
        }
        +"title": 6103
      }
      3 => App\Entity\EntryComment {#2470
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2459 …}
        +body: "The circuit works when there is a common ground (makes sense ofc but originally I thought they had to be separate), I didn’t want to put 5V and 12V on the same rail of the breadboard. Now what I find strange is that even without the 5V input voltage, I still get 10V at the output of the Op-amp which is very confusing."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688154877 {#1597
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@grasib@lemmy.world"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2457 …}
        +nested: Doctrine\ORM\PersistentCollection {#2469 …}
        +votes: Doctrine\ORM\PersistentCollection {#2471 …}
        +reports: Doctrine\ORM\PersistentCollection {#2363 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2377 …}
        +notifications: Doctrine\ORM\PersistentCollection {#2359 …}
        -id: 6104
        -bodyTs: "'10v':54 '12v':30 '5v':28,48 'amp':62 'breadboard':37 'circuit':2 'common':8 'confus':66 'didn':23 'even':45 'find':41 'get':53 'ground':9 'input':49 'make':10 'ofc':12 'op':61 'op-amp':60 'origin':14 'output':57 'put':27 'rail':34 'sens':11 'separ':21 'still':52 'strang':42 'thought':16 'voltag':50 'want':25 'without':46 'work':3"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497352"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688154877 {#2468
          date: 2023-06-30 21:54:37.0 +02:00
        }
        +"title": 6104
      }
      1 => App\Entity\EntryComment {#1908
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1407 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "I tied the Arduino’s GND to the power supply GND, the output is still 10V, tried different ICs as well, not really sure what the issue is at this point. Tying the non inverting input pin to ground does turn OFF the LED, but the led stays on regardless if the 5V is coming from the arduino or not, it seems that the op amp outputs 10V regardless of the non-inverting pin, however if I use different resistors to lower the gain or change the input voltage to 3.3V instead of 5V, I do get the output voltage. I just don’t understand how there can be 10V at the output with no voltage from the inverting or non-inverting pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688333159 {#1410
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1883 …}
        +nested: Doctrine\ORM\PersistentCollection {#2389 …}
        +votes: Doctrine\ORM\PersistentCollection {#2387 …}
        +reports: Doctrine\ORM\PersistentCollection {#2394 …}
        +favourites: Doctrine\ORM\PersistentCollection {#2393 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1381 …}
        -id: 7162
        -bodyTs: "'10v':16,68,112 '3.3':92 '5v':53,96 'amp':66 'arduino':4,58 'chang':87 'come':55 'differ':18,80 'gain':85 'get':99 'gnd':6,11 'ground':39 'howev':76 'ic':19 'input':36,89 'instead':94 'invert':35,74,121,125 'issu':27 'led':44,47 'lower':83 'non':34,73,124 'non-invert':72,123 'op':65 'output':13,67,101,115 'pin':37,75,126 'point':31 'power':9 'realli':23 'regardless':50,69 'resistor':81 'seem':62 'stay':48 'still':15 'suppli':10 'sure':24 'tie':2,32 'tri':17 'turn':41 'understand':107 'use':79 'v':93 'voltag':90,102,118 'well':21"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/557569"
        +editedAt: DateTimeImmutable @1688335162 {#1874
          date: 2023-07-02 23:59:22.0 +02:00
        }
        +createdAt: DateTimeImmutable @1688333159 {#1907
          date: 2023-07-02 23:25:59.0 +02:00
        }
        +"title": 7162
      }
      2 => App\Entity\EntryComment {#2380
        +user: App\Entity\User {#260 …}
        +entry: App\Entity\Entry {#1434}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
        +body: "![](https://discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)Here’s a schematic representation of what I built on the breadboard, establishing the same ground point works but the LED still turns on even when V+ is disconnected from the 5V Arduino pin."
        +lang: "en"
        +isAdult: false
        +favouriteCount: 0
        +score: 0
        +lastActive: DateTime @1688155219 {#2364
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@0x4E4F@lemmy.fmhy.ml"
        ]
        +children: Doctrine\ORM\PersistentCollection {#2382 …}
        +nested: Doctrine\ORM\PersistentCollection {#2384 …}
        +votes: Doctrine\ORM\PersistentCollection {#2379 …}
        +reports: Doctrine\ORM\PersistentCollection {#2383 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1906 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1708 …}
        -id: 6107
        -bodyTs: "'/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':3 '5v':34 'arduino':35 'breadboard':14 'built':11 'disconnect':31 'discuss.tchncs.de':2 'discuss.tchncs.de/pictrs/image/1e43a618-1b76-4528-92bb-81b3232d9df6.jpeg)here':1 'establish':15 'even':27 'ground':18 'led':23 'pin':36 'point':19 'represent':7 'schemat':6 'still':24 'turn':25 'v':29 'work':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/497439"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688155219 {#2372
          date: 2023-06-30 22:00:19.0 +02:00
        }
        +"title": 6107
      }
      0 => App\Entity\EntryComment {#1385}
    ]
    -id: 526
    -titleTs: "'circuit':5 'invert':3 'lm358':4 'non':2 'non-invert':1 'work':7"
    -bodyTs: "'/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':198 '/ask-an-educator-making-a-non-':195 '1':99 '10v':78 '12v':52 '1k':71 '2':112 '3':159 '5v':60,131 'adafruit':166 'amp':7,43 'amplif':30 'amplifi':74 'arduino':56 'around':21 'attempt':34 'blog.adafruit.com':194,197 'blog.adafruit.com/2012/06/13/ask-an-educator-making-a-non-inverting-op-amp-circuit-on-a-breadboard/)':196 'build':16,36 'built':121 'chosen':69 'circuit':18,91,119,182 'connect':146,171 'current':31 'diagram':183 'differ':24 'even':154 'exact':114 'feedback':169 'follow':98 'ground':102,148,175,191 'indic':88 'input':65,108,136,157,189 'invert':41 'led':85,125,140 'link':193 'lm358':38 'never':3 'non':40 'non-invert':39 'op':6,42 'op-amp':5 'output':81 'pin':66 'post':164 'power':48 'practic':11 'probe':20 'problem':12 'put':83 'question':95 'rail':53,106,152,178 'read':9 'resistor':25,72,170 'right':137 'seen':162 'set':28 'show':186 'signal':76,109 'sinc':1 'suppli':49,61,133,153,179 'turn':128,142 'two':70 'understood':4 'uno':57 'use':23,46 'v':64 'valu':26 've':161 'voltag':105,151,158,190 'want':14,123 'without':155 'work':93 'wrong':116"
    +cross: false
    +upVotes: 0
    +downVotes: 0
    +ranking: 1688103034
    +visibility: "visible             "
    +apId: "https://discuss.tchncs.de/post/372756"
    +editedAt: null
    +createdAt: DateTimeImmutable @1688045034 {#1642
      date: 2023-06-29 15:23:54.0 +02:00
    }
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1656 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#1382 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2386 …}
  +body: "But that’s the thing, it outputs 10V even when the 5V rail from Arduino is disconnected at V+ (pin 3)."
  +lang: "en"
  +isAdult: false
  +favouriteCount: 0
  +score: 0
  +lastActive: DateTime @1688335254 {#1402
    date: 2023-07-03 00:00:54.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@0x4E4F@lemmy.fmhy.ml"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1401 …}
  +nested: Doctrine\ORM\PersistentCollection {#1363 …}
  +votes: Doctrine\ORM\PersistentCollection {#1362 …}
  +reports: Doctrine\ORM\PersistentCollection {#2019 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2030 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2026 …}
  -id: 7172
  -bodyTs: "'10v':8 '3':21 '5v':12 'arduino':15 'disconnect':17 'even':9 'output':7 'pin':20 'rail':13 'thing':5 'v':19"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/558794"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688335254 {#1405
    date: 2023-07-03 00:00:54.0 +02:00
  }
  +"title": 7172
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
25 DENIED ROLE_ADMIN 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
26 DENIED ROLE_MODERATOR 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details