GET https://kbin.spritesserver.nl/m/askelectronics@discuss.tchncs.de/t/1031/Small-fan-switch-sanity-check/oldest

Response
200 OK
IP
216.73.216.194
Profiled on
Token
cf220c

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 …}
}
 0.76 ms (none) 
Symfony\Component\Security\Http\Firewall\AuthenticatorManagerListener {#584
  -authenticatorManager: Symfony\Component\Security\Http\Authentication\AuthenticatorManager {#595 …}
}
 0.00 ms (none) 
Scheb\TwoFactorBundle\Security\Http\Firewall\TwoFactorAccessListener {#582
  -twoFactorFirewallConfig: Scheb\TwoFactorBundle\Security\TwoFactor\TwoFactorFirewallConfig {#842 …}
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -twoFactorAccessDecider: Scheb\TwoFactorBundle\Security\Authorization\TwoFactorAccessDecider {#581 …}
}
 0.04 ms (none) 
Symfony\Component\Security\Http\Firewall\AccessListener {#579
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -accessDecisionManager: Symfony\Component\Security\Core\Authorization\TraceableAccessDecisionManager {#937 …}
  -map: Symfony\Component\Security\Http\AccessMap {#722 …}
}
 0.00 ms (none) 
Symfony\Component\Security\Http\Firewall\LogoutListener {#786
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -options: [
    "csrf_parameter" => "_csrf_token"
    "csrf_token_id" => "logout"
    "logout_path" => "app_logout"
  ]
  -httpUtils: Symfony\Component\Security\Http\HttpUtils {#841 …}
  -csrfTokenManager: Symfony\Component\Security\Csrf\CsrfTokenManager {#1015 …}
  -eventDispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}
}
 0.00 ms (none)

Authenticators

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

Access Decision

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

Access decision log

# Result Attributes Object
1 DENIED ROLE_USER 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
2 DENIED moderate 
App\Entity\Entry {#2412
  +user: Proxies\__CG__\App\Entity\User {#1970 …}
  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
    +apProfileId: "https://discuss.tchncs.de/c/askelectronics"
    +apPublicUrl: "https://discuss.tchncs.de/c/askelectronics"
    +apFollowersUrl: "https://discuss.tchncs.de/c/askelectronics/followers"
    +apInboxUrl: "https://discuss.tchncs.de/inbox"
    +apDomain: "discuss.tchncs.de"
    +apPreferredUsername: "askelectronics"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
  +image: Proxies\__CG__\App\Entity\Image {#1943 …}
  +domain: Proxies\__CG__\App\Entity\Domain {#1912 …}
  +slug: "Small-fan-switch-sanity-check"
  +title: "Small fan switch sanity check."
  +url: "https://lemmy.world/pictrs/image/061d3d3b-64a0-4dd8-bbd2-6f4a7226af3c.jpeg"
  +body: """
    Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
    \n
    Suggestions? Any advice is greatly appreciated!\n
    \n
    *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
    \n
    raspi-gpio set 17 op dh\n
    \n
    raspi-gpio set 17 op dl\n
    \n
    I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
    """
  +type: "image"
  +lang: "en"
  +isOc: false
  +hasEmbed: true
  +commentCount: 17
  +favouriteCount: 36
  +score: 0
  +isAdult: false
  +sticky: false
  +lastActive: DateTime @1689109140 {#2410
    date: 2023-07-11 22:59:00.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1866 …}
  +votes: Doctrine\ORM\PersistentCollection {#1966 …}
  +reports: Doctrine\ORM\PersistentCollection {#1946 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1368 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2426 …}
  +badges: Doctrine\ORM\PersistentCollection {#2439 …}
  +children: []
  -id: 1031
  -titleTs: "'check':5 'fan':2 'saniti':4 'small':1 'switch':3"
  -bodyTs: "'/d/bnq5u4f).':175 '/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python)':65 '17':93,103,110,144 '4':87 '7v':27 'a.co':174 'a.co/d/bnq5u4f).':173 'accord':13 'adapt':60 'advic':74 'appreci':77 'base':88 'base/resistor':150 'breadboard':118 'brushless':34 'case':166 'charger':57 'circuit':1,58,81 'close':163 'combo':167 'come':127 'command':98 'compon':138 'confirm':79 'connect':141 'control':4 'current':46 'dc':35 'dh':105 'didn':114 'diod':22 'dl':112 'drop':28 'edit':78 'fan':6,41,131,171 'fold':158 'gpio':92,101,108,143 'great':76 'hack':121 'hack-n-slash':120 'hand':71 'heat':153 'heatsink':169 'hole':137 'hook':51 'hous':165 'howchoo.com':64 'howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python)':63 'includ':168 'insul':157 'jumper':140 'lead':133,151 'manual':95 'mark':38 'measur':44 'motor':36 'multimet':49 'n':122 'on/off':12 'op':104,111 'pi':10,86 'pwm':17 'raspberri':9,85 'raspi':100,107 'raspi-gpio':99,106 'set':102,109 'shrink':154 'slash':123 'socket':147 'suggest':72 'sure':19 'temp':15 'test':96 'thru':136 'tini':33 'tube':155 'usb':56 'use':66,97,116 'wire':90,126 'work':82"
  +cross: false
  +upVotes: 0
  +downVotes: 0
  +ranking: 1689126684
  +visibility: "visible             "
  +apId: "https://lemmy.world/post/1328894"
  +editedAt: DateTimeImmutable @1689223573 {#1850
    date: 2023-07-13 06:46:13.0 +02:00
  }
  +createdAt: DateTimeImmutable @1689040284 {#2420
    date: 2023-07-11 03:51:24.0 +02:00
  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS DENIED 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
3 DENIED edit 
App\Entity\Entry {#2412
  +user: Proxies\__CG__\App\Entity\User {#1970 …}
  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
    +apProfileId: "https://discuss.tchncs.de/c/askelectronics"
    +apPublicUrl: "https://discuss.tchncs.de/c/askelectronics"
    +apFollowersUrl: "https://discuss.tchncs.de/c/askelectronics/followers"
    +apInboxUrl: "https://discuss.tchncs.de/inbox"
    +apDomain: "discuss.tchncs.de"
    +apPreferredUsername: "askelectronics"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
  +image: Proxies\__CG__\App\Entity\Image {#1943 …}
  +domain: Proxies\__CG__\App\Entity\Domain {#1912 …}
  +slug: "Small-fan-switch-sanity-check"
  +title: "Small fan switch sanity check."
  +url: "https://lemmy.world/pictrs/image/061d3d3b-64a0-4dd8-bbd2-6f4a7226af3c.jpeg"
  +body: """
    Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
    \n
    Suggestions? Any advice is greatly appreciated!\n
    \n
    *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
    \n
    raspi-gpio set 17 op dh\n
    \n
    raspi-gpio set 17 op dl\n
    \n
    I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
    """
  +type: "image"
  +lang: "en"
  +isOc: false
  +hasEmbed: true
  +commentCount: 17
  +favouriteCount: 36
  +score: 0
  +isAdult: false
  +sticky: false
  +lastActive: DateTime @1689109140 {#2410
    date: 2023-07-11 22:59:00.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1866 …}
  +votes: Doctrine\ORM\PersistentCollection {#1966 …}
  +reports: Doctrine\ORM\PersistentCollection {#1946 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1368 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2426 …}
  +badges: Doctrine\ORM\PersistentCollection {#2439 …}
  +children: []
  -id: 1031
  -titleTs: "'check':5 'fan':2 'saniti':4 'small':1 'switch':3"
  -bodyTs: "'/d/bnq5u4f).':175 '/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python)':65 '17':93,103,110,144 '4':87 '7v':27 'a.co':174 'a.co/d/bnq5u4f).':173 'accord':13 'adapt':60 'advic':74 'appreci':77 'base':88 'base/resistor':150 'breadboard':118 'brushless':34 'case':166 'charger':57 'circuit':1,58,81 'close':163 'combo':167 'come':127 'command':98 'compon':138 'confirm':79 'connect':141 'control':4 'current':46 'dc':35 'dh':105 'didn':114 'diod':22 'dl':112 'drop':28 'edit':78 'fan':6,41,131,171 'fold':158 'gpio':92,101,108,143 'great':76 'hack':121 'hack-n-slash':120 'hand':71 'heat':153 'heatsink':169 'hole':137 'hook':51 'hous':165 'howchoo.com':64 'howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python)':63 'includ':168 'insul':157 'jumper':140 'lead':133,151 'manual':95 'mark':38 'measur':44 'motor':36 'multimet':49 'n':122 'on/off':12 'op':104,111 'pi':10,86 'pwm':17 'raspberri':9,85 'raspi':100,107 'raspi-gpio':99,106 'set':102,109 'shrink':154 'slash':123 'socket':147 'suggest':72 'sure':19 'temp':15 'test':96 'thru':136 'tini':33 'tube':155 'usb':56 'use':66,97,116 'wire':90,126 'work':82"
  +cross: false
  +upVotes: 0
  +downVotes: 0
  +ranking: 1689126684
  +visibility: "visible             "
  +apId: "https://lemmy.world/post/1328894"
  +editedAt: DateTimeImmutable @1689223573 {#1850
    date: 2023-07-13 06:46:13.0 +02:00
  }
  +createdAt: DateTimeImmutable @1689040284 {#2420
    date: 2023-07-11 03:51:24.0 +02:00
  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS DENIED 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
4 DENIED moderate 
App\Entity\Entry {#2412
  +user: Proxies\__CG__\App\Entity\User {#1970 …}
  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
    +apProfileId: "https://discuss.tchncs.de/c/askelectronics"
    +apPublicUrl: "https://discuss.tchncs.de/c/askelectronics"
    +apFollowersUrl: "https://discuss.tchncs.de/c/askelectronics/followers"
    +apInboxUrl: "https://discuss.tchncs.de/inbox"
    +apDomain: "discuss.tchncs.de"
    +apPreferredUsername: "askelectronics"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
  +image: Proxies\__CG__\App\Entity\Image {#1943 …}
  +domain: Proxies\__CG__\App\Entity\Domain {#1912 …}
  +slug: "Small-fan-switch-sanity-check"
  +title: "Small fan switch sanity check."
  +url: "https://lemmy.world/pictrs/image/061d3d3b-64a0-4dd8-bbd2-6f4a7226af3c.jpeg"
  +body: """
    Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
    \n
    Suggestions? Any advice is greatly appreciated!\n
    \n
    *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
    \n
    raspi-gpio set 17 op dh\n
    \n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
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      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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        \n
        Rules\n
        -----\n
        \n
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        \n
        2: Be on-topic (eg: *Electronic*, not *electrical*).\n
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    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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        \n
        Rules\n
        -----\n
        \n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      \n
      raspi-gpio set 17 op dl\n
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      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      \n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Suggestions? Any advice is greatly appreciated!\n
      \n
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      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
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13 DENIED ROLE_USER 
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14 DENIED moderate 
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        \n
        Rules\n
        -----\n
        \n
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        \n
        2: Be on-topic (eg: *Electronic*, not *electrical*).\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
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      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
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        **For questions about component-level electronic circuits, tools and equipment.**\n
        \n
        Rules\n
        -----\n
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    +image: Proxies\__CG__\App\Entity\Image {#1943 …}
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    +slug: "Small-fan-switch-sanity-check"
    +title: "Small fan switch sanity check."
    +url: "https://lemmy.world/pictrs/image/061d3d3b-64a0-4dd8-bbd2-6f4a7226af3c.jpeg"
    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      \n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
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      \n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Suggestions? Any advice is greatly appreciated!\n
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      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
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26 DENIED moderate 
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Suggestions? Any advice is greatly appreciated!\n
      \n
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      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Suggestions? Any advice is greatly appreciated!\n
      \n
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      \n
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      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
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      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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    +body: "The board is built into the motor and should also add flyback protection, that’s why I’m not sure if I need the diode. Give it juice and it spins."
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  +body: "The point of the diode is to prevent reverse current that gets induced when a (brushed) motor is turned off. It essentially turns into a small generator while spinning down, and the diode essentially short circuits that. It prevents damage to the rest of the circuit. If that motor is brushless (with an integrated control board), you likely won’t need it but it doesn’t do any harm either."
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
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      \n
      raspi-gpio set 17 op dh\n
      \n
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      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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41 DENIED ROLE_USER 
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42 DENIED moderate 
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    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      date: 2023-07-13 06:46:13.0 +02:00
    }
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      date: 2023-07-11 03:51:24.0 +02:00
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        +body: "I’m no expert by any means and correct me if I’m wrong, but don’t you need a control board to drive brushless DC motors?"
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      +body: "The board is built into the motor and should also add flyback protection, that’s why I’m not sure if I need the diode. Give it juice and it spins."
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    +body: "The point of the diode is to prevent reverse current that gets induced when a (brushed) motor is turned off. It essentially turns into a small generator while spinning down, and the diode essentially short circuits that. It prevents damage to the rest of the circuit. If that motor is brushless (with an integrated control board), you likely won’t need it but it doesn’t do any harm either."
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  +body: """
    That’s what I figured as well, there’s some sort of board under the top of the housing. I’m going to leave the diode in.\n
    \n
    I appreciate the advice!
    """
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43 DENIED edit 
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        **For questions about component-level electronic circuits, tools and equipment.**\n
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        Rules\n
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    +slug: "Small-fan-switch-sanity-check"
    +title: "Small fan switch sanity check."
    +url: "https://lemmy.world/pictrs/image/061d3d3b-64a0-4dd8-bbd2-6f4a7226af3c.jpeg"
    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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        +body: "I’m no expert by any means and correct me if I’m wrong, but don’t you need a control board to drive brushless DC motors?"
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      +body: "The board is built into the motor and should also add flyback protection, that’s why I’m not sure if I need the diode. Give it juice and it spins."
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    +body: "The point of the diode is to prevent reverse current that gets induced when a (brushed) motor is turned off. It essentially turns into a small generator while spinning down, and the diode essentially short circuits that. It prevents damage to the rest of the circuit. If that motor is brushless (with an integrated control board), you likely won’t need it but it doesn’t do any harm either."
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    That’s what I figured as well, there’s some sort of board under the top of the housing. I’m going to leave the diode in.\n
    \n
    I appreciate the advice!
    """
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    +title: "Small fan switch sanity check."
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    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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        +body: "I’m no expert by any means and correct me if I’m wrong, but don’t you need a control board to drive brushless DC motors?"
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      +body: "The board is built into the motor and should also add flyback protection, that’s why I’m not sure if I need the diode. Give it juice and it spins."
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    +body: "The point of the diode is to prevent reverse current that gets induced when a (brushed) motor is turned off. It essentially turns into a small generator while spinning down, and the diode essentially short circuits that. It prevents damage to the rest of the circuit. If that motor is brushless (with an integrated control board), you likely won’t need it but it doesn’t do any harm either."
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    -id: 10359
    -bodyTs: "'board':56 'brush':16 'brushless':51 'circuit':36,46 'control':55 'current':10 'damag':40 'diod':5,33 'doesn':65 'either':70 'essenti':22,34 'generat':27 'get':12 'harm':69 'induc':13 'integr':54 'like':58 'motor':17,49 'need':61 'point':2 'prevent':8,39 'rest':43 'revers':9 'short':35 'small':26 'spin':29 'turn':19,23 'won':59"
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  +body: """
    That’s what I figured as well, there’s some sort of board under the top of the housing. I’m going to leave the diode in.\n
    \n
    I appreciate the advice!
    """
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    +url: "https://lemmy.world/pictrs/image/061d3d3b-64a0-4dd8-bbd2-6f4a7226af3c.jpeg"
    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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        +body: "I’m no expert by any means and correct me if I’m wrong, but don’t you need a control board to drive brushless DC motors?"
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      +body: "The board is built into the motor and should also add flyback protection, that’s why I’m not sure if I need the diode. Give it juice and it spins."
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    +body: "The point of the diode is to prevent reverse current that gets induced when a (brushed) motor is turned off. It essentially turns into a small generator while spinning down, and the diode essentially short circuits that. It prevents damage to the rest of the circuit. If that motor is brushless (with an integrated control board), you likely won’t need it but it doesn’t do any harm either."
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    > It essentially turns into a small generator while spinning down\n
    \n
    Kind of like an inductor?
    """
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    +slug: "Small-fan-switch-sanity-check"
    +title: "Small fan switch sanity check."
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    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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    > It essentially turns into a small generator while spinning down\n
    \n
    Kind of like an inductor?
    """
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    +slug: "Small-fan-switch-sanity-check"
    +title: "Small fan switch sanity check."
    +url: "https://lemmy.world/pictrs/image/061d3d3b-64a0-4dd8-bbd2-6f4a7226af3c.jpeg"
    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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        +body: "I’m no expert by any means and correct me if I’m wrong, but don’t you need a control board to drive brushless DC motors?"
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      +body: "The board is built into the motor and should also add flyback protection, that’s why I’m not sure if I need the diode. Give it juice and it spins."
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    +body: "The point of the diode is to prevent reverse current that gets induced when a (brushed) motor is turned off. It essentially turns into a small generator while spinning down, and the diode essentially short circuits that. It prevents damage to the rest of the circuit. If that motor is brushless (with an integrated control board), you likely won’t need it but it doesn’t do any harm either."
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  +body: """
    > It essentially turns into a small generator while spinning down\n
    \n
    Kind of like an inductor?
    """
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    +url: "https://lemmy.world/pictrs/image/061d3d3b-64a0-4dd8-bbd2-6f4a7226af3c.jpeg"
    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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  +body: "Doing some quick math, the transistor will have a base current of 5 milliamps, which a Pi should be able to supply. At a fairly typical beta of 100, the transistor could drive the fan at up to .5 amps, which is plenty for a small fan. A MOSFET transistor is generally better suited for switching high current loads, but for this a BJT (as drawn) should be fine."
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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    Awesome. That agrees with what I calculated as well. I’m a jack when it comes to electronics.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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    Awesome. That agrees with what I calculated as well. I’m a jack when it comes to electronics.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      \n
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    +body: "Doing some quick math, the transistor will have a base current of 5 milliamps, which a Pi should be able to supply. At a fairly typical beta of 100, the transistor could drive the fan at up to .5 amps, which is plenty for a small fan. A MOSFET transistor is generally better suited for switching high current loads, but for this a BJT (as drawn) should be fine."
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    Awesome. That agrees with what I calculated as well. I’m a jack when it comes to electronics.\n
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    Thank you much for the help!
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      \n
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      \n
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  +body: "The transistor is a 2N4401. From the datasheet, V~BE(sat,max)~ = 1.2 V and h~FE(min)~ = 20, so it could drive ~60 mA in the worst case"
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    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
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      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Suggestions? Any advice is greatly appreciated!\n
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      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
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      raspi-gpio set 17 op dh\n
      \n
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      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
      *EDIT: Confirmed, this circuit works on a Raspberry Pi 4. Base was wired to GPIO 17 and manually tested using commands:\n
      \n
      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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      +body: "Doing some quick math, the transistor will have a base current of 5 milliamps, which a Pi should be able to supply. At a fairly typical beta of 100, the transistor could drive the fan at up to .5 amps, which is plenty for a small fan. A MOSFET transistor is generally better suited for switching high current loads, but for this a BJT (as drawn) should be fine."
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    +body: "The transistor is a 2N4401. From the datasheet, V~BE(sat,max)~ = 1.2 V and h~FE(min)~ = 20, so it could drive ~60 mA in the worst case"
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
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      raspi-gpio set 17 op dh\n
      \n
      raspi-gpio set 17 op dl\n
      \n
      I didn’t use a breadboard, just hack-n-slash with the wires coming out of the fan, the leads on the thru hole components, a jumper connected to gpio 17 as a socket for the base/resistor lead, and heat shrink tubing for insulation. Folded it up as I closed the housing. Case combo including heatsinks and fan [here](https://a.co/d/bNQ5u4f).
      """
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  +body: "On a KISS basis - I tend to just use a bimetallic switch or omit the temperature control and just run the fan from power up. It’s possible for a processor to suffer some non-handled exception where it no longer executes the temperature management routine."
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
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    +body: """
      Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from [here](https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python) using what I have on hand.\n
      \n
      Suggestions? Any advice is greatly appreciated!\n
      \n
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      \n
      raspi-gpio set 17 op dl\n
      \n
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      """
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Show voter details
73 DENIED edit 
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