Redirect 302 redirect from GET @entry_comment_create (21d0ab)

GET https://kbin.spritesserver.nl/u/@Susan_B_Good@discuss.tchncs.de/active/2023-06-30::2023-06-30

Response
200 OK
IP
216.73.216.97
Profiled on
Token
773e4c

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 …}
}
 15.79 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 …}
}
 0.06 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 
Proxies\__CG__\App\Entity\Entry {#1582
  +user: Proxies\__CG__\App\Entity\User {#2467 …}
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
  +image: Proxies\__CG__\App\Entity\Image {#1723 …}
  +domain: Proxies\__CG__\App\Entity\Domain {#2382 …}
  +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 {#1716
    date: 2023-07-11 19:01:02.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1548 …}
  +votes: Doctrine\ORM\PersistentCollection {#1562 …}
  +reports: Doctrine\ORM\PersistentCollection {#1525 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1407 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1410 …}
  +badges: Doctrine\ORM\PersistentCollection {#1402 …}
  +children: [
    1 => App\Entity\EntryComment {#1561
      +user: App\Entity\User {#264 …}
      +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#1711 …}
      +root: App\Entity\EntryComment {#1709
        +user: App\Entity\User {#264 …}
        +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
        +image: null
        +parent: null
        +root: null
        +body: """
          Just a word of caution - education is a process of diminishing deception. Books provide a simplified version of real World electronics. Universities and colleges put a lot of effort into designing lab practicals that will actually work and give the predictable results that students expect.\n
          \n
          So the normal learning process when it comes to op amps - is to read and understand the theory. Then complete those crafted lab practical exercises - having been introduced to the added complication of systemic and random errors. Then do your own thing, when all the remaining Real Life complications hit you like a brick.\n
          \n
          So, if you can find a course in analogue electronics, even a distance learning one, you might find the steps are smaller and more easy to assimilate.
          """
        +lang: "en"
        +isAdult: false
        +favouriteCount: 2
        +score: 0
        +lastActive: DateTime @1688161946 {#1435
          date: 2023-06-30 23:52:26.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1572 …}
        +nested: Doctrine\ORM\PersistentCollection {#1581 …}
        +votes: Doctrine\ORM\PersistentCollection {#1579 …}
        +reports: Doctrine\ORM\PersistentCollection {#1577 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1573 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1650 …}
        -id: 5898
        -bodyTs: "'actual':36 'ad':76 'amp':56 'analogu':108 'assimil':126 'book':13 'brick':99 'caution':5 'colleg':24 'come':53 'complet':65 'complic':77,94 'cours':106 'craft':67 'decept':12 'design':31 'diminish':11 'distanc':112 'easi':124 'educ':6 'effort':29 'electron':21,109 'error':82 'even':110 'exercis':70 'expect':45 'find':104,117 'give':39 'hit':95 'introduc':73 'lab':32,68 'learn':49,113 'life':93 'like':97 'lot':27 'might':116 'normal':48 'one':114 'op':55 'practic':33,69 'predict':41 'process':9,50 'provid':14 'put':25 'random':81 'read':59 'real':19,92 'remain':91 'result':42 'simplifi':16 'smaller':121 'step':119 'student':44 'system':79 'theori':63 'thing':87 'understand':61 'univers':22 'version':17 'word':3 'work':37 'world':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/485010"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688113392 {#1438
          date: 2023-06-30 10:23:12.0 +02:00
        }
        +"title": 5898
      }
      +body: """
        What worked for me, that may not do so for anyone else - is to take an existing circuit (usually a reference one provided by a manufacturer) and build that. Get that working (sometimes, it hasn’t worked- the manufacturer’s technical support department has often been very helpful, especially when their reference design has a design fault or has been misprinted - after doing that, they used to send me unmarked, pre-production chips/etc to play with and provide feedback).\n
        \n
        Then modified that design, to test my understanding. Tried different board layouts, guard rings, etc and documented the effect. When it didn’t work as expected - took that back to their tech support to see if we could work out why.\n
        \n
        So, for me, taking something that works and keep modifying it, just a little.
        """
      +lang: "en"
      +isAdult: false
      +favouriteCount: 2
      +score: 0
      +lastActive: DateTime @1688161945 {#1670
        date: 2023-06-30 23:52:25.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@Susan_B_Good@discuss.tchncs.de"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1705 …}
      +nested: Doctrine\ORM\PersistentCollection {#1691 …}
      +votes: Doctrine\ORM\PersistentCollection {#1689 …}
      +reports: Doctrine\ORM\PersistentCollection {#1687 …}
      +favourites: Doctrine\ORM\PersistentCollection {#1701 …}
      +notifications: Doctrine\ORM\PersistentCollection {#1619 …}
      -id: 6127
      -bodyTs: "'anyon':11 'back':109 'board':91 'build':28 'chips/etc':74 'circuit':18 'could':118 'depart':43 'design':53,56,84 'didn':102 'differ':90 'document':97 'effect':99 'els':12 'especi':49 'etc':95 'exist':17 'expect':106 'fault':57 'feedback':80 'get':30 'guard':93 'hasn':35 'help':48 'keep':130 'layout':92 'littl':135 'manufactur':26,39 'may':6 'misprint':61 'modifi':82,131 'often':45 'one':22 'play':76 'pre':72 'pre-product':71 'product':73 'provid':23,79 'refer':21,52 'ring':94 'see':115 'send':68 'someth':126 'sometim':33 'support':42,113 'take':15,125 'tech':112 'technic':41 'test':86 'took':107 'tri':89 'understand':88 'unmark':70 'use':66 'usual':19 'work':2,32,37,104,119,128"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/499200"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688161945 {#1527
        date: 2023-06-30 23:52:25.0 +02:00
      }
      +"title": 6127
    }
    0 => App\Entity\EntryComment {#1709}
  ]
  -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 {#1696
    date: 2023-06-29 15:23:54.0 +02:00
  }
  +__isInitialized__: true
   …2
}
 
"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 
Proxies\__CG__\App\Entity\Entry {#1582
  +user: Proxies\__CG__\App\Entity\User {#2467 …}
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
  +image: Proxies\__CG__\App\Entity\Image {#1723 …}
  +domain: Proxies\__CG__\App\Entity\Domain {#2382 …}
  +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 {#1716
    date: 2023-07-11 19:01:02.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1548 …}
  +votes: Doctrine\ORM\PersistentCollection {#1562 …}
  +reports: Doctrine\ORM\PersistentCollection {#1525 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1407 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1410 …}
  +badges: Doctrine\ORM\PersistentCollection {#1402 …}
  +children: [
    1 => App\Entity\EntryComment {#1561
      +user: App\Entity\User {#264 …}
      +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#1711 …}
      +root: App\Entity\EntryComment {#1709
        +user: App\Entity\User {#264 …}
        +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
        +image: null
        +parent: null
        +root: null
        +body: """
          Just a word of caution - education is a process of diminishing deception. Books provide a simplified version of real World electronics. Universities and colleges put a lot of effort into designing lab practicals that will actually work and give the predictable results that students expect.\n
          \n
          So the normal learning process when it comes to op amps - is to read and understand the theory. Then complete those crafted lab practical exercises - having been introduced to the added complication of systemic and random errors. Then do your own thing, when all the remaining Real Life complications hit you like a brick.\n
          \n
          So, if you can find a course in analogue electronics, even a distance learning one, you might find the steps are smaller and more easy to assimilate.
          """
        +lang: "en"
        +isAdult: false
        +favouriteCount: 2
        +score: 0
        +lastActive: DateTime @1688161946 {#1435
          date: 2023-06-30 23:52:26.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1572 …}
        +nested: Doctrine\ORM\PersistentCollection {#1581 …}
        +votes: Doctrine\ORM\PersistentCollection {#1579 …}
        +reports: Doctrine\ORM\PersistentCollection {#1577 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1573 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1650 …}
        -id: 5898
        -bodyTs: "'actual':36 'ad':76 'amp':56 'analogu':108 'assimil':126 'book':13 'brick':99 'caution':5 'colleg':24 'come':53 'complet':65 'complic':77,94 'cours':106 'craft':67 'decept':12 'design':31 'diminish':11 'distanc':112 'easi':124 'educ':6 'effort':29 'electron':21,109 'error':82 'even':110 'exercis':70 'expect':45 'find':104,117 'give':39 'hit':95 'introduc':73 'lab':32,68 'learn':49,113 'life':93 'like':97 'lot':27 'might':116 'normal':48 'one':114 'op':55 'practic':33,69 'predict':41 'process':9,50 'provid':14 'put':25 'random':81 'read':59 'real':19,92 'remain':91 'result':42 'simplifi':16 'smaller':121 'step':119 'student':44 'system':79 'theori':63 'thing':87 'understand':61 'univers':22 'version':17 'word':3 'work':37 'world':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/485010"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688113392 {#1438
          date: 2023-06-30 10:23:12.0 +02:00
        }
        +"title": 5898
      }
      +body: """
        What worked for me, that may not do so for anyone else - is to take an existing circuit (usually a reference one provided by a manufacturer) and build that. Get that working (sometimes, it hasn’t worked- the manufacturer’s technical support department has often been very helpful, especially when their reference design has a design fault or has been misprinted - after doing that, they used to send me unmarked, pre-production chips/etc to play with and provide feedback).\n
        \n
        Then modified that design, to test my understanding. Tried different board layouts, guard rings, etc and documented the effect. When it didn’t work as expected - took that back to their tech support to see if we could work out why.\n
        \n
        So, for me, taking something that works and keep modifying it, just a little.
        """
      +lang: "en"
      +isAdult: false
      +favouriteCount: 2
      +score: 0
      +lastActive: DateTime @1688161945 {#1670
        date: 2023-06-30 23:52:25.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@Susan_B_Good@discuss.tchncs.de"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1705 …}
      +nested: Doctrine\ORM\PersistentCollection {#1691 …}
      +votes: Doctrine\ORM\PersistentCollection {#1689 …}
      +reports: Doctrine\ORM\PersistentCollection {#1687 …}
      +favourites: Doctrine\ORM\PersistentCollection {#1701 …}
      +notifications: Doctrine\ORM\PersistentCollection {#1619 …}
      -id: 6127
      -bodyTs: "'anyon':11 'back':109 'board':91 'build':28 'chips/etc':74 'circuit':18 'could':118 'depart':43 'design':53,56,84 'didn':102 'differ':90 'document':97 'effect':99 'els':12 'especi':49 'etc':95 'exist':17 'expect':106 'fault':57 'feedback':80 'get':30 'guard':93 'hasn':35 'help':48 'keep':130 'layout':92 'littl':135 'manufactur':26,39 'may':6 'misprint':61 'modifi':82,131 'often':45 'one':22 'play':76 'pre':72 'pre-product':71 'product':73 'provid':23,79 'refer':21,52 'ring':94 'see':115 'send':68 'someth':126 'sometim':33 'support':42,113 'take':15,125 'tech':112 'technic':41 'test':86 'took':107 'tri':89 'understand':88 'unmark':70 'use':66 'usual':19 'work':2,32,37,104,119,128"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/499200"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688161945 {#1527
        date: 2023-06-30 23:52:25.0 +02:00
      }
      +"title": 6127
    }
    0 => App\Entity\EntryComment {#1709}
  ]
  -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 {#1696
    date: 2023-06-29 15:23:54.0 +02:00
  }
  +__isInitialized__: true
   …2
}
 
"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 
Proxies\__CG__\App\Entity\Entry {#1582
  +user: Proxies\__CG__\App\Entity\User {#2467 …}
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
  +image: Proxies\__CG__\App\Entity\Image {#1723 …}
  +domain: Proxies\__CG__\App\Entity\Domain {#2382 …}
  +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 {#1716
    date: 2023-07-11 19:01:02.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1548 …}
  +votes: Doctrine\ORM\PersistentCollection {#1562 …}
  +reports: Doctrine\ORM\PersistentCollection {#1525 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1407 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1410 …}
  +badges: Doctrine\ORM\PersistentCollection {#1402 …}
  +children: [
    1 => App\Entity\EntryComment {#1561
      +user: App\Entity\User {#264 …}
      +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
      +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
      +image: null
      +parent: Proxies\__CG__\App\Entity\EntryComment {#1711 …}
      +root: App\Entity\EntryComment {#1709
        +user: App\Entity\User {#264 …}
        +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
        +image: null
        +parent: null
        +root: null
        +body: """
          Just a word of caution - education is a process of diminishing deception. Books provide a simplified version of real World electronics. Universities and colleges put a lot of effort into designing lab practicals that will actually work and give the predictable results that students expect.\n
          \n
          So the normal learning process when it comes to op amps - is to read and understand the theory. Then complete those crafted lab practical exercises - having been introduced to the added complication of systemic and random errors. Then do your own thing, when all the remaining Real Life complications hit you like a brick.\n
          \n
          So, if you can find a course in analogue electronics, even a distance learning one, you might find the steps are smaller and more easy to assimilate.
          """
        +lang: "en"
        +isAdult: false
        +favouriteCount: 2
        +score: 0
        +lastActive: DateTime @1688161946 {#1435
          date: 2023-06-30 23:52:26.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1572 …}
        +nested: Doctrine\ORM\PersistentCollection {#1581 …}
        +votes: Doctrine\ORM\PersistentCollection {#1579 …}
        +reports: Doctrine\ORM\PersistentCollection {#1577 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1573 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1650 …}
        -id: 5898
        -bodyTs: "'actual':36 'ad':76 'amp':56 'analogu':108 'assimil':126 'book':13 'brick':99 'caution':5 'colleg':24 'come':53 'complet':65 'complic':77,94 'cours':106 'craft':67 'decept':12 'design':31 'diminish':11 'distanc':112 'easi':124 'educ':6 'effort':29 'electron':21,109 'error':82 'even':110 'exercis':70 'expect':45 'find':104,117 'give':39 'hit':95 'introduc':73 'lab':32,68 'learn':49,113 'life':93 'like':97 'lot':27 'might':116 'normal':48 'one':114 'op':55 'practic':33,69 'predict':41 'process':9,50 'provid':14 'put':25 'random':81 'read':59 'real':19,92 'remain':91 'result':42 'simplifi':16 'smaller':121 'step':119 'student':44 'system':79 'theori':63 'thing':87 'understand':61 'univers':22 'version':17 'word':3 'work':37 'world':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/485010"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688113392 {#1438
          date: 2023-06-30 10:23:12.0 +02:00
        }
        +"title": 5898
      }
      +body: """
        What worked for me, that may not do so for anyone else - is to take an existing circuit (usually a reference one provided by a manufacturer) and build that. Get that working (sometimes, it hasn’t worked- the manufacturer’s technical support department has often been very helpful, especially when their reference design has a design fault or has been misprinted - after doing that, they used to send me unmarked, pre-production chips/etc to play with and provide feedback).\n
        \n
        Then modified that design, to test my understanding. Tried different board layouts, guard rings, etc and documented the effect. When it didn’t work as expected - took that back to their tech support to see if we could work out why.\n
        \n
        So, for me, taking something that works and keep modifying it, just a little.
        """
      +lang: "en"
      +isAdult: false
      +favouriteCount: 2
      +score: 0
      +lastActive: DateTime @1688161945 {#1670
        date: 2023-06-30 23:52:25.0 +02:00
      }
      +ip: null
      +tags: null
      +mentions: [
        "@Drich98@discuss.tchncs.de"
        "@Susan_B_Good@discuss.tchncs.de"
      ]
      +children: Doctrine\ORM\PersistentCollection {#1705 …}
      +nested: Doctrine\ORM\PersistentCollection {#1691 …}
      +votes: Doctrine\ORM\PersistentCollection {#1689 …}
      +reports: Doctrine\ORM\PersistentCollection {#1687 …}
      +favourites: Doctrine\ORM\PersistentCollection {#1701 …}
      +notifications: Doctrine\ORM\PersistentCollection {#1619 …}
      -id: 6127
      -bodyTs: "'anyon':11 'back':109 'board':91 'build':28 'chips/etc':74 'circuit':18 'could':118 'depart':43 'design':53,56,84 'didn':102 'differ':90 'document':97 'effect':99 'els':12 'especi':49 'etc':95 'exist':17 'expect':106 'fault':57 'feedback':80 'get':30 'guard':93 'hasn':35 'help':48 'keep':130 'layout':92 'littl':135 'manufactur':26,39 'may':6 'misprint':61 'modifi':82,131 'often':45 'one':22 'play':76 'pre':72 'pre-product':71 'product':73 'provid':23,79 'refer':21,52 'ring':94 'see':115 'send':68 'someth':126 'sometim':33 'support':42,113 'take':15,125 'tech':112 'technic':41 'test':86 'took':107 'tri':89 'understand':88 'unmark':70 'use':66 'usual':19 'work':2,32,37,104,119,128"
      +ranking: 0
      +commentCount: 0
      +upVotes: 0
      +downVotes: 0
      +visibility: "visible             "
      +apId: "https://discuss.tchncs.de/comment/499200"
      +editedAt: null
      +createdAt: DateTimeImmutable @1688161945 {#1527
        date: 2023-06-30 23:52:25.0 +02:00
      }
      +"title": 6127
    }
    0 => App\Entity\EntryComment {#1709}
  ]
  -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 {#1696
    date: 2023-06-29 15:23:54.0 +02:00
  }
  +__isInitialized__: true
   …2
}
 
"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 {#1561
  +user: App\Entity\User {#264 …}
  +entry: Proxies\__CG__\App\Entity\Entry {#1582
    +user: Proxies\__CG__\App\Entity\User {#2467 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
    +image: Proxies\__CG__\App\Entity\Image {#1723 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#2382 …}
    +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 {#1716
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1548 …}
    +votes: Doctrine\ORM\PersistentCollection {#1562 …}
    +reports: Doctrine\ORM\PersistentCollection {#1525 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1407 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1410 …}
    +badges: Doctrine\ORM\PersistentCollection {#1402 …}
    +children: [
      1 => App\Entity\EntryComment {#1561}
      0 => App\Entity\EntryComment {#1709
        +user: App\Entity\User {#264 …}
        +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
        +image: null
        +parent: null
        +root: null
        +body: """
          Just a word of caution - education is a process of diminishing deception. Books provide a simplified version of real World electronics. Universities and colleges put a lot of effort into designing lab practicals that will actually work and give the predictable results that students expect.\n
          \n
          So the normal learning process when it comes to op amps - is to read and understand the theory. Then complete those crafted lab practical exercises - having been introduced to the added complication of systemic and random errors. Then do your own thing, when all the remaining Real Life complications hit you like a brick.\n
          \n
          So, if you can find a course in analogue electronics, even a distance learning one, you might find the steps are smaller and more easy to assimilate.
          """
        +lang: "en"
        +isAdult: false
        +favouriteCount: 2
        +score: 0
        +lastActive: DateTime @1688161946 {#1435
          date: 2023-06-30 23:52:26.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1572 …}
        +nested: Doctrine\ORM\PersistentCollection {#1581 …}
        +votes: Doctrine\ORM\PersistentCollection {#1579 …}
        +reports: Doctrine\ORM\PersistentCollection {#1577 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1573 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1650 …}
        -id: 5898
        -bodyTs: "'actual':36 'ad':76 'amp':56 'analogu':108 'assimil':126 'book':13 'brick':99 'caution':5 'colleg':24 'come':53 'complet':65 'complic':77,94 'cours':106 'craft':67 'decept':12 'design':31 'diminish':11 'distanc':112 'easi':124 'educ':6 'effort':29 'electron':21,109 'error':82 'even':110 'exercis':70 'expect':45 'find':104,117 'give':39 'hit':95 'introduc':73 'lab':32,68 'learn':49,113 'life':93 'like':97 'lot':27 'might':116 'normal':48 'one':114 'op':55 'practic':33,69 'predict':41 'process':9,50 'provid':14 'put':25 'random':81 'read':59 'real':19,92 'remain':91 'result':42 'simplifi':16 'smaller':121 'step':119 'student':44 'system':79 'theori':63 'thing':87 'understand':61 'univers':22 'version':17 'word':3 'work':37 'world':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/485010"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688113392 {#1438
          date: 2023-06-30 10:23:12.0 +02:00
        }
        +"title": 5898
      }
    ]
    -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 {#1696
      date: 2023-06-29 15:23:54.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#1711 …}
  +root: App\Entity\EntryComment {#1709}
  +body: """
    What worked for me, that may not do so for anyone else - is to take an existing circuit (usually a reference one provided by a manufacturer) and build that. Get that working (sometimes, it hasn’t worked- the manufacturer’s technical support department has often been very helpful, especially when their reference design has a design fault or has been misprinted - after doing that, they used to send me unmarked, pre-production chips/etc to play with and provide feedback).\n
    \n
    Then modified that design, to test my understanding. Tried different board layouts, guard rings, etc and documented the effect. When it didn’t work as expected - took that back to their tech support to see if we could work out why.\n
    \n
    So, for me, taking something that works and keep modifying it, just a little.
    """
  +lang: "en"
  +isAdult: false
  +favouriteCount: 2
  +score: 0
  +lastActive: DateTime @1688161945 {#1670
    date: 2023-06-30 23:52:25.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@Susan_B_Good@discuss.tchncs.de"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1705 …}
  +nested: Doctrine\ORM\PersistentCollection {#1691 …}
  +votes: Doctrine\ORM\PersistentCollection {#1689 …}
  +reports: Doctrine\ORM\PersistentCollection {#1687 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1701 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1619 …}
  -id: 6127
  -bodyTs: "'anyon':11 'back':109 'board':91 'build':28 'chips/etc':74 'circuit':18 'could':118 'depart':43 'design':53,56,84 'didn':102 'differ':90 'document':97 'effect':99 'els':12 'especi':49 'etc':95 'exist':17 'expect':106 'fault':57 'feedback':80 'get':30 'guard':93 'hasn':35 'help':48 'keep':130 'layout':92 'littl':135 'manufactur':26,39 'may':6 'misprint':61 'modifi':82,131 'often':45 'one':22 'play':76 'pre':72 'pre-product':71 'product':73 'provid':23,79 'refer':21,52 'ring':94 'see':115 'send':68 'someth':126 'sometim':33 'support':42,113 'take':15,125 'tech':112 'technic':41 'test':86 'took':107 'tri':89 'understand':88 'unmark':70 'use':66 'usual':19 'work':2,32,37,104,119,128"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/499200"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688161945 {#1527
    date: 2023-06-30 23:52:25.0 +02:00
  }
  +"title": 6127
}
 
"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 {#1561
  +user: App\Entity\User {#264 …}
  +entry: Proxies\__CG__\App\Entity\Entry {#1582
    +user: Proxies\__CG__\App\Entity\User {#2467 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
    +image: Proxies\__CG__\App\Entity\Image {#1723 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#2382 …}
    +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 {#1716
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1548 …}
    +votes: Doctrine\ORM\PersistentCollection {#1562 …}
    +reports: Doctrine\ORM\PersistentCollection {#1525 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1407 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1410 …}
    +badges: Doctrine\ORM\PersistentCollection {#1402 …}
    +children: [
      1 => App\Entity\EntryComment {#1561}
      0 => App\Entity\EntryComment {#1709
        +user: App\Entity\User {#264 …}
        +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
        +image: null
        +parent: null
        +root: null
        +body: """
          Just a word of caution - education is a process of diminishing deception. Books provide a simplified version of real World electronics. Universities and colleges put a lot of effort into designing lab practicals that will actually work and give the predictable results that students expect.\n
          \n
          So the normal learning process when it comes to op amps - is to read and understand the theory. Then complete those crafted lab practical exercises - having been introduced to the added complication of systemic and random errors. Then do your own thing, when all the remaining Real Life complications hit you like a brick.\n
          \n
          So, if you can find a course in analogue electronics, even a distance learning one, you might find the steps are smaller and more easy to assimilate.
          """
        +lang: "en"
        +isAdult: false
        +favouriteCount: 2
        +score: 0
        +lastActive: DateTime @1688161946 {#1435
          date: 2023-06-30 23:52:26.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1572 …}
        +nested: Doctrine\ORM\PersistentCollection {#1581 …}
        +votes: Doctrine\ORM\PersistentCollection {#1579 …}
        +reports: Doctrine\ORM\PersistentCollection {#1577 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1573 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1650 …}
        -id: 5898
        -bodyTs: "'actual':36 'ad':76 'amp':56 'analogu':108 'assimil':126 'book':13 'brick':99 'caution':5 'colleg':24 'come':53 'complet':65 'complic':77,94 'cours':106 'craft':67 'decept':12 'design':31 'diminish':11 'distanc':112 'easi':124 'educ':6 'effort':29 'electron':21,109 'error':82 'even':110 'exercis':70 'expect':45 'find':104,117 'give':39 'hit':95 'introduc':73 'lab':32,68 'learn':49,113 'life':93 'like':97 'lot':27 'might':116 'normal':48 'one':114 'op':55 'practic':33,69 'predict':41 'process':9,50 'provid':14 'put':25 'random':81 'read':59 'real':19,92 'remain':91 'result':42 'simplifi':16 'smaller':121 'step':119 'student':44 'system':79 'theori':63 'thing':87 'understand':61 'univers':22 'version':17 'word':3 'work':37 'world':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/485010"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688113392 {#1438
          date: 2023-06-30 10:23:12.0 +02:00
        }
        +"title": 5898
      }
    ]
    -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 {#1696
      date: 2023-06-29 15:23:54.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#1711 …}
  +root: App\Entity\EntryComment {#1709}
  +body: """
    What worked for me, that may not do so for anyone else - is to take an existing circuit (usually a reference one provided by a manufacturer) and build that. Get that working (sometimes, it hasn’t worked- the manufacturer’s technical support department has often been very helpful, especially when their reference design has a design fault or has been misprinted - after doing that, they used to send me unmarked, pre-production chips/etc to play with and provide feedback).\n
    \n
    Then modified that design, to test my understanding. Tried different board layouts, guard rings, etc and documented the effect. When it didn’t work as expected - took that back to their tech support to see if we could work out why.\n
    \n
    So, for me, taking something that works and keep modifying it, just a little.
    """
  +lang: "en"
  +isAdult: false
  +favouriteCount: 2
  +score: 0
  +lastActive: DateTime @1688161945 {#1670
    date: 2023-06-30 23:52:25.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@Susan_B_Good@discuss.tchncs.de"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1705 …}
  +nested: Doctrine\ORM\PersistentCollection {#1691 …}
  +votes: Doctrine\ORM\PersistentCollection {#1689 …}
  +reports: Doctrine\ORM\PersistentCollection {#1687 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1701 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1619 …}
  -id: 6127
  -bodyTs: "'anyon':11 'back':109 'board':91 'build':28 'chips/etc':74 'circuit':18 'could':118 'depart':43 'design':53,56,84 'didn':102 'differ':90 'document':97 'effect':99 'els':12 'especi':49 'etc':95 'exist':17 'expect':106 'fault':57 'feedback':80 'get':30 'guard':93 'hasn':35 'help':48 'keep':130 'layout':92 'littl':135 'manufactur':26,39 'may':6 'misprint':61 'modifi':82,131 'often':45 'one':22 'play':76 'pre':72 'pre-product':71 'product':73 'provid':23,79 'refer':21,52 'ring':94 'see':115 'send':68 'someth':126 'sometim':33 'support':42,113 'take':15,125 'tech':112 'technic':41 'test':86 'took':107 'tri':89 'understand':88 'unmark':70 'use':66 'usual':19 'work':2,32,37,104,119,128"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/499200"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688161945 {#1527
    date: 2023-06-30 23:52:25.0 +02:00
  }
  +"title": 6127
}
 
"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 {#1561
  +user: App\Entity\User {#264 …}
  +entry: Proxies\__CG__\App\Entity\Entry {#1582
    +user: Proxies\__CG__\App\Entity\User {#2467 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
    +image: Proxies\__CG__\App\Entity\Image {#1723 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#2382 …}
    +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 {#1716
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1548 …}
    +votes: Doctrine\ORM\PersistentCollection {#1562 …}
    +reports: Doctrine\ORM\PersistentCollection {#1525 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1407 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1410 …}
    +badges: Doctrine\ORM\PersistentCollection {#1402 …}
    +children: [
      1 => App\Entity\EntryComment {#1561}
      0 => App\Entity\EntryComment {#1709
        +user: App\Entity\User {#264 …}
        +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
        +image: null
        +parent: null
        +root: null
        +body: """
          Just a word of caution - education is a process of diminishing deception. Books provide a simplified version of real World electronics. Universities and colleges put a lot of effort into designing lab practicals that will actually work and give the predictable results that students expect.\n
          \n
          So the normal learning process when it comes to op amps - is to read and understand the theory. Then complete those crafted lab practical exercises - having been introduced to the added complication of systemic and random errors. Then do your own thing, when all the remaining Real Life complications hit you like a brick.\n
          \n
          So, if you can find a course in analogue electronics, even a distance learning one, you might find the steps are smaller and more easy to assimilate.
          """
        +lang: "en"
        +isAdult: false
        +favouriteCount: 2
        +score: 0
        +lastActive: DateTime @1688161946 {#1435
          date: 2023-06-30 23:52:26.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1572 …}
        +nested: Doctrine\ORM\PersistentCollection {#1581 …}
        +votes: Doctrine\ORM\PersistentCollection {#1579 …}
        +reports: Doctrine\ORM\PersistentCollection {#1577 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1573 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1650 …}
        -id: 5898
        -bodyTs: "'actual':36 'ad':76 'amp':56 'analogu':108 'assimil':126 'book':13 'brick':99 'caution':5 'colleg':24 'come':53 'complet':65 'complic':77,94 'cours':106 'craft':67 'decept':12 'design':31 'diminish':11 'distanc':112 'easi':124 'educ':6 'effort':29 'electron':21,109 'error':82 'even':110 'exercis':70 'expect':45 'find':104,117 'give':39 'hit':95 'introduc':73 'lab':32,68 'learn':49,113 'life':93 'like':97 'lot':27 'might':116 'normal':48 'one':114 'op':55 'practic':33,69 'predict':41 'process':9,50 'provid':14 'put':25 'random':81 'read':59 'real':19,92 'remain':91 'result':42 'simplifi':16 'smaller':121 'step':119 'student':44 'system':79 'theori':63 'thing':87 'understand':61 'univers':22 'version':17 'word':3 'work':37 'world':20"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/485010"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688113392 {#1438
          date: 2023-06-30 10:23:12.0 +02:00
        }
        +"title": 5898
      }
    ]
    -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 {#1696
      date: 2023-06-29 15:23:54.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#1711 …}
  +root: App\Entity\EntryComment {#1709}
  +body: """
    What worked for me, that may not do so for anyone else - is to take an existing circuit (usually a reference one provided by a manufacturer) and build that. Get that working (sometimes, it hasn’t worked- the manufacturer’s technical support department has often been very helpful, especially when their reference design has a design fault or has been misprinted - after doing that, they used to send me unmarked, pre-production chips/etc to play with and provide feedback).\n
    \n
    Then modified that design, to test my understanding. Tried different board layouts, guard rings, etc and documented the effect. When it didn’t work as expected - took that back to their tech support to see if we could work out why.\n
    \n
    So, for me, taking something that works and keep modifying it, just a little.
    """
  +lang: "en"
  +isAdult: false
  +favouriteCount: 2
  +score: 0
  +lastActive: DateTime @1688161945 {#1670
    date: 2023-06-30 23:52:25.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
    "@Susan_B_Good@discuss.tchncs.de"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1705 …}
  +nested: Doctrine\ORM\PersistentCollection {#1691 …}
  +votes: Doctrine\ORM\PersistentCollection {#1689 …}
  +reports: Doctrine\ORM\PersistentCollection {#1687 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1701 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1619 …}
  -id: 6127
  -bodyTs: "'anyon':11 'back':109 'board':91 'build':28 'chips/etc':74 'circuit':18 'could':118 'depart':43 'design':53,56,84 'didn':102 'differ':90 'document':97 'effect':99 'els':12 'especi':49 'etc':95 'exist':17 'expect':106 'fault':57 'feedback':80 'get':30 'guard':93 'hasn':35 'help':48 'keep':130 'layout':92 'littl':135 'manufactur':26,39 'may':6 'misprint':61 'modifi':82,131 'often':45 'one':22 'play':76 'pre':72 'pre-product':71 'product':73 'provid':23,79 'refer':21,52 'ring':94 'see':115 'send':68 'someth':126 'sometim':33 'support':42,113 'take':15,125 'tech':112 'technic':41 'test':86 'took':107 'tri':89 'understand':88 'unmark':70 'use':66 'usual':19 'work':2,32,37,104,119,128"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/499200"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688161945 {#1527
    date: 2023-06-30 23:52:25.0 +02:00
  }
  +"title": 6127
}
 
"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 {#1709
  +user: App\Entity\User {#264 …}
  +entry: Proxies\__CG__\App\Entity\Entry {#1582
    +user: Proxies\__CG__\App\Entity\User {#2467 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
    +image: Proxies\__CG__\App\Entity\Image {#1723 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#2382 …}
    +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 {#1716
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1548 …}
    +votes: Doctrine\ORM\PersistentCollection {#1562 …}
    +reports: Doctrine\ORM\PersistentCollection {#1525 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1407 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1410 …}
    +badges: Doctrine\ORM\PersistentCollection {#1402 …}
    +children: [
      1 => App\Entity\EntryComment {#1561
        +user: App\Entity\User {#264 …}
        +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1711 …}
        +root: App\Entity\EntryComment {#1709}
        +body: """
          What worked for me, that may not do so for anyone else - is to take an existing circuit (usually a reference one provided by a manufacturer) and build that. Get that working (sometimes, it hasn’t worked- the manufacturer’s technical support department has often been very helpful, especially when their reference design has a design fault or has been misprinted - after doing that, they used to send me unmarked, pre-production chips/etc to play with and provide feedback).\n
          \n
          Then modified that design, to test my understanding. Tried different board layouts, guard rings, etc and documented the effect. When it didn’t work as expected - took that back to their tech support to see if we could work out why.\n
          \n
          So, for me, taking something that works and keep modifying it, just a little.
          """
        +lang: "en"
        +isAdult: false
        +favouriteCount: 2
        +score: 0
        +lastActive: DateTime @1688161945 {#1670
          date: 2023-06-30 23:52:25.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1705 …}
        +nested: Doctrine\ORM\PersistentCollection {#1691 …}
        +votes: Doctrine\ORM\PersistentCollection {#1689 …}
        +reports: Doctrine\ORM\PersistentCollection {#1687 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1701 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1619 …}
        -id: 6127
        -bodyTs: "'anyon':11 'back':109 'board':91 'build':28 'chips/etc':74 'circuit':18 'could':118 'depart':43 'design':53,56,84 'didn':102 'differ':90 'document':97 'effect':99 'els':12 'especi':49 'etc':95 'exist':17 'expect':106 'fault':57 'feedback':80 'get':30 'guard':93 'hasn':35 'help':48 'keep':130 'layout':92 'littl':135 'manufactur':26,39 'may':6 'misprint':61 'modifi':82,131 'often':45 'one':22 'play':76 'pre':72 'pre-product':71 'product':73 'provid':23,79 'refer':21,52 'ring':94 'see':115 'send':68 'someth':126 'sometim':33 'support':42,113 'take':15,125 'tech':112 'technic':41 'test':86 'took':107 'tri':89 'understand':88 'unmark':70 'use':66 'usual':19 'work':2,32,37,104,119,128"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/499200"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688161945 {#1527
          date: 2023-06-30 23:52:25.0 +02:00
        }
        +"title": 6127
      }
      0 => App\Entity\EntryComment {#1709}
    ]
    -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 {#1696
      date: 2023-06-29 15:23:54.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
  +image: null
  +parent: null
  +root: null
  +body: """
    Just a word of caution - education is a process of diminishing deception. Books provide a simplified version of real World electronics. Universities and colleges put a lot of effort into designing lab practicals that will actually work and give the predictable results that students expect.\n
    \n
    So the normal learning process when it comes to op amps - is to read and understand the theory. Then complete those crafted lab practical exercises - having been introduced to the added complication of systemic and random errors. Then do your own thing, when all the remaining Real Life complications hit you like a brick.\n
    \n
    So, if you can find a course in analogue electronics, even a distance learning one, you might find the steps are smaller and more easy to assimilate.
    """
  +lang: "en"
  +isAdult: false
  +favouriteCount: 2
  +score: 0
  +lastActive: DateTime @1688161946 {#1435
    date: 2023-06-30 23:52:26.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1572 …}
  +nested: Doctrine\ORM\PersistentCollection {#1581 …}
  +votes: Doctrine\ORM\PersistentCollection {#1579 …}
  +reports: Doctrine\ORM\PersistentCollection {#1577 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1573 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1650 …}
  -id: 5898
  -bodyTs: "'actual':36 'ad':76 'amp':56 'analogu':108 'assimil':126 'book':13 'brick':99 'caution':5 'colleg':24 'come':53 'complet':65 'complic':77,94 'cours':106 'craft':67 'decept':12 'design':31 'diminish':11 'distanc':112 'easi':124 'educ':6 'effort':29 'electron':21,109 'error':82 'even':110 'exercis':70 'expect':45 'find':104,117 'give':39 'hit':95 'introduc':73 'lab':32,68 'learn':49,113 'life':93 'like':97 'lot':27 'might':116 'normal':48 'one':114 'op':55 'practic':33,69 'predict':41 'process':9,50 'provid':14 'put':25 'random':81 'read':59 'real':19,92 'remain':91 'result':42 'simplifi':16 'smaller':121 'step':119 'student':44 'system':79 'theori':63 'thing':87 'understand':61 'univers':22 'version':17 'word':3 'work':37 'world':20"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/485010"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688113392 {#1438
    date: 2023-06-30 10:23:12.0 +02:00
  }
  +"title": 5898
}
 
"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 {#1709
  +user: App\Entity\User {#264 …}
  +entry: Proxies\__CG__\App\Entity\Entry {#1582
    +user: Proxies\__CG__\App\Entity\User {#2467 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
    +image: Proxies\__CG__\App\Entity\Image {#1723 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#2382 …}
    +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 {#1716
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1548 …}
    +votes: Doctrine\ORM\PersistentCollection {#1562 …}
    +reports: Doctrine\ORM\PersistentCollection {#1525 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1407 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1410 …}
    +badges: Doctrine\ORM\PersistentCollection {#1402 …}
    +children: [
      1 => App\Entity\EntryComment {#1561
        +user: App\Entity\User {#264 …}
        +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1711 …}
        +root: App\Entity\EntryComment {#1709}
        +body: """
          What worked for me, that may not do so for anyone else - is to take an existing circuit (usually a reference one provided by a manufacturer) and build that. Get that working (sometimes, it hasn’t worked- the manufacturer’s technical support department has often been very helpful, especially when their reference design has a design fault or has been misprinted - after doing that, they used to send me unmarked, pre-production chips/etc to play with and provide feedback).\n
          \n
          Then modified that design, to test my understanding. Tried different board layouts, guard rings, etc and documented the effect. When it didn’t work as expected - took that back to their tech support to see if we could work out why.\n
          \n
          So, for me, taking something that works and keep modifying it, just a little.
          """
        +lang: "en"
        +isAdult: false
        +favouriteCount: 2
        +score: 0
        +lastActive: DateTime @1688161945 {#1670
          date: 2023-06-30 23:52:25.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1705 …}
        +nested: Doctrine\ORM\PersistentCollection {#1691 …}
        +votes: Doctrine\ORM\PersistentCollection {#1689 …}
        +reports: Doctrine\ORM\PersistentCollection {#1687 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1701 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1619 …}
        -id: 6127
        -bodyTs: "'anyon':11 'back':109 'board':91 'build':28 'chips/etc':74 'circuit':18 'could':118 'depart':43 'design':53,56,84 'didn':102 'differ':90 'document':97 'effect':99 'els':12 'especi':49 'etc':95 'exist':17 'expect':106 'fault':57 'feedback':80 'get':30 'guard':93 'hasn':35 'help':48 'keep':130 'layout':92 'littl':135 'manufactur':26,39 'may':6 'misprint':61 'modifi':82,131 'often':45 'one':22 'play':76 'pre':72 'pre-product':71 'product':73 'provid':23,79 'refer':21,52 'ring':94 'see':115 'send':68 'someth':126 'sometim':33 'support':42,113 'take':15,125 'tech':112 'technic':41 'test':86 'took':107 'tri':89 'understand':88 'unmark':70 'use':66 'usual':19 'work':2,32,37,104,119,128"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/499200"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688161945 {#1527
          date: 2023-06-30 23:52:25.0 +02:00
        }
        +"title": 6127
      }
      0 => App\Entity\EntryComment {#1709}
    ]
    -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 {#1696
      date: 2023-06-29 15:23:54.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
  +image: null
  +parent: null
  +root: null
  +body: """
    Just a word of caution - education is a process of diminishing deception. Books provide a simplified version of real World electronics. Universities and colleges put a lot of effort into designing lab practicals that will actually work and give the predictable results that students expect.\n
    \n
    So the normal learning process when it comes to op amps - is to read and understand the theory. Then complete those crafted lab practical exercises - having been introduced to the added complication of systemic and random errors. Then do your own thing, when all the remaining Real Life complications hit you like a brick.\n
    \n
    So, if you can find a course in analogue electronics, even a distance learning one, you might find the steps are smaller and more easy to assimilate.
    """
  +lang: "en"
  +isAdult: false
  +favouriteCount: 2
  +score: 0
  +lastActive: DateTime @1688161946 {#1435
    date: 2023-06-30 23:52:26.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1572 …}
  +nested: Doctrine\ORM\PersistentCollection {#1581 …}
  +votes: Doctrine\ORM\PersistentCollection {#1579 …}
  +reports: Doctrine\ORM\PersistentCollection {#1577 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1573 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1650 …}
  -id: 5898
  -bodyTs: "'actual':36 'ad':76 'amp':56 'analogu':108 'assimil':126 'book':13 'brick':99 'caution':5 'colleg':24 'come':53 'complet':65 'complic':77,94 'cours':106 'craft':67 'decept':12 'design':31 'diminish':11 'distanc':112 'easi':124 'educ':6 'effort':29 'electron':21,109 'error':82 'even':110 'exercis':70 'expect':45 'find':104,117 'give':39 'hit':95 'introduc':73 'lab':32,68 'learn':49,113 'life':93 'like':97 'lot':27 'might':116 'normal':48 'one':114 'op':55 'practic':33,69 'predict':41 'process':9,50 'provid':14 'put':25 'random':81 'read':59 'real':19,92 'remain':91 'result':42 'simplifi':16 'smaller':121 'step':119 'student':44 'system':79 'theori':63 'thing':87 'understand':61 'univers':22 'version':17 'word':3 'work':37 'world':20"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/485010"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688113392 {#1438
    date: 2023-06-30 10:23:12.0 +02:00
  }
  +"title": 5898
}
 
"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 {#1709
  +user: App\Entity\User {#264 …}
  +entry: Proxies\__CG__\App\Entity\Entry {#1582
    +user: Proxies\__CG__\App\Entity\User {#2467 …}
    +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
    +image: Proxies\__CG__\App\Entity\Image {#1723 …}
    +domain: Proxies\__CG__\App\Entity\Domain {#2382 …}
    +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 {#1716
      date: 2023-07-11 19:01:02.0 +02:00
    }
    +ip: null
    +adaAmount: 0
    +tags: null
    +mentions: null
    +comments: Doctrine\ORM\PersistentCollection {#1548 …}
    +votes: Doctrine\ORM\PersistentCollection {#1562 …}
    +reports: Doctrine\ORM\PersistentCollection {#1525 …}
    +favourites: Doctrine\ORM\PersistentCollection {#1407 …}
    +notifications: Doctrine\ORM\PersistentCollection {#1410 …}
    +badges: Doctrine\ORM\PersistentCollection {#1402 …}
    +children: [
      1 => App\Entity\EntryComment {#1561
        +user: App\Entity\User {#264 …}
        +entry: Proxies\__CG__\App\Entity\Entry {#1582 …2}
        +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
        +image: null
        +parent: Proxies\__CG__\App\Entity\EntryComment {#1711 …}
        +root: App\Entity\EntryComment {#1709}
        +body: """
          What worked for me, that may not do so for anyone else - is to take an existing circuit (usually a reference one provided by a manufacturer) and build that. Get that working (sometimes, it hasn’t worked- the manufacturer’s technical support department has often been very helpful, especially when their reference design has a design fault or has been misprinted - after doing that, they used to send me unmarked, pre-production chips/etc to play with and provide feedback).\n
          \n
          Then modified that design, to test my understanding. Tried different board layouts, guard rings, etc and documented the effect. When it didn’t work as expected - took that back to their tech support to see if we could work out why.\n
          \n
          So, for me, taking something that works and keep modifying it, just a little.
          """
        +lang: "en"
        +isAdult: false
        +favouriteCount: 2
        +score: 0
        +lastActive: DateTime @1688161945 {#1670
          date: 2023-06-30 23:52:25.0 +02:00
        }
        +ip: null
        +tags: null
        +mentions: [
          "@Drich98@discuss.tchncs.de"
          "@Susan_B_Good@discuss.tchncs.de"
        ]
        +children: Doctrine\ORM\PersistentCollection {#1705 …}
        +nested: Doctrine\ORM\PersistentCollection {#1691 …}
        +votes: Doctrine\ORM\PersistentCollection {#1689 …}
        +reports: Doctrine\ORM\PersistentCollection {#1687 …}
        +favourites: Doctrine\ORM\PersistentCollection {#1701 …}
        +notifications: Doctrine\ORM\PersistentCollection {#1619 …}
        -id: 6127
        -bodyTs: "'anyon':11 'back':109 'board':91 'build':28 'chips/etc':74 'circuit':18 'could':118 'depart':43 'design':53,56,84 'didn':102 'differ':90 'document':97 'effect':99 'els':12 'especi':49 'etc':95 'exist':17 'expect':106 'fault':57 'feedback':80 'get':30 'guard':93 'hasn':35 'help':48 'keep':130 'layout':92 'littl':135 'manufactur':26,39 'may':6 'misprint':61 'modifi':82,131 'often':45 'one':22 'play':76 'pre':72 'pre-product':71 'product':73 'provid':23,79 'refer':21,52 'ring':94 'see':115 'send':68 'someth':126 'sometim':33 'support':42,113 'take':15,125 'tech':112 'technic':41 'test':86 'took':107 'tri':89 'understand':88 'unmark':70 'use':66 'usual':19 'work':2,32,37,104,119,128"
        +ranking: 0
        +commentCount: 0
        +upVotes: 0
        +downVotes: 0
        +visibility: "visible             "
        +apId: "https://discuss.tchncs.de/comment/499200"
        +editedAt: null
        +createdAt: DateTimeImmutable @1688161945 {#1527
          date: 2023-06-30 23:52:25.0 +02:00
        }
        +"title": 6127
      }
      0 => App\Entity\EntryComment {#1709}
    ]
    -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 {#1696
      date: 2023-06-29 15:23:54.0 +02:00
    }
    +__isInitialized__: true
     …2
  }
  +magazine: Proxies\__CG__\App\Entity\Magazine {#1574 …}
  +image: null
  +parent: null
  +root: null
  +body: """
    Just a word of caution - education is a process of diminishing deception. Books provide a simplified version of real World electronics. Universities and colleges put a lot of effort into designing lab practicals that will actually work and give the predictable results that students expect.\n
    \n
    So the normal learning process when it comes to op amps - is to read and understand the theory. Then complete those crafted lab practical exercises - having been introduced to the added complication of systemic and random errors. Then do your own thing, when all the remaining Real Life complications hit you like a brick.\n
    \n
    So, if you can find a course in analogue electronics, even a distance learning one, you might find the steps are smaller and more easy to assimilate.
    """
  +lang: "en"
  +isAdult: false
  +favouriteCount: 2
  +score: 0
  +lastActive: DateTime @1688161946 {#1435
    date: 2023-06-30 23:52:26.0 +02:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@Drich98@discuss.tchncs.de"
  ]
  +children: Doctrine\ORM\PersistentCollection {#1572 …}
  +nested: Doctrine\ORM\PersistentCollection {#1581 …}
  +votes: Doctrine\ORM\PersistentCollection {#1579 …}
  +reports: Doctrine\ORM\PersistentCollection {#1577 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1573 …}
  +notifications: Doctrine\ORM\PersistentCollection {#1650 …}
  -id: 5898
  -bodyTs: "'actual':36 'ad':76 'amp':56 'analogu':108 'assimil':126 'book':13 'brick':99 'caution':5 'colleg':24 'come':53 'complet':65 'complic':77,94 'cours':106 'craft':67 'decept':12 'design':31 'diminish':11 'distanc':112 'easi':124 'educ':6 'effort':29 'electron':21,109 'error':82 'even':110 'exercis':70 'expect':45 'find':104,117 'give':39 'hit':95 'introduc':73 'lab':32,68 'learn':49,113 'life':93 'like':97 'lot':27 'might':116 'normal':48 'one':114 'op':55 'practic':33,69 'predict':41 'process':9,50 'provid':14 'put':25 'random':81 'read':59 'real':19,92 'remain':91 'result':42 'simplifi':16 'smaller':121 'step':119 'student':44 'system':79 'theori':63 'thing':87 'understand':61 'univers':22 'version':17 'word':3 'work':37 'world':20"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/comment/485010"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688113392 {#1438
    date: 2023-06-30 10:23:12.0 +02:00
  }
  +"title": 5898
}
 
"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_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
14 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