Redirect 302 redirect from GET @entry_comment_create (bb1f4e)

GET https://kbin.spritesserver.nl/index.php/m/askelectronics@discuss.tchncs.de/t/2887/How-to-solve-power-supply-whine-with-continuous-dimming-LED/oldest

Response
200 OK
IP
216.73.216.148
Profiled on
Token
8d7b41

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 …}
}
 6.76 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 …}
}
 0.28 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 {#1978 …}
  +magazine: App\Entity\Magazine {#264
    +icon: Proxies\__CG__\App\Entity\Image {#245 …}
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    +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
      ---
      """
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    +moderators: Doctrine\ORM\PersistentCollection {#236 …}
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  +domain: Proxies\__CG__\App\Entity\Domain {#1889 …}
  +slug: "How-to-solve-power-supply-whine-with-continuous-dimming-LED"
  +title: "How to solve power supply whine with continuous dimming LED?"
  +url: "https://imgur.com/a/QKMl22Z"
  +body: """
    My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet.\n
    \n
    In my video you can see it working but also hear the power supply complaining.\n
    \n
    I’m using the LEDC Arduino library which allows me to select the frequency and resolution for PWM.\n
    \n
    If I set the frequency too low the whine is extreme, but at this setting it’s the best I’ve been able to achieve, which is about 9000Hz. Unfortunately you can still hear the sound from across the room!\n
    \n
    It is a cheapo solid state power supply that claims it can output 12v up to 25A. I tried my desktop supply and it emits some whine too, so I don’t think replacing the power will totally fix this.\n
    \n
    Is there a technique for tuning the frequency or even just masking it somehow?
    """
  +type: "link"
  +lang: "en"
  +isOc: false
  +hasEmbed: true
  +commentCount: 13
  +favouriteCount: 16
  +score: 0
  +isAdult: false
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  +lastActive: DateTime @1696811953 {#2418
    date: 2023-10-09 02:39:13.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1688 …}
  +votes: Doctrine\ORM\PersistentCollection {#1966 …}
  +reports: Doctrine\ORM\PersistentCollection {#1965 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1368 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2426 …}
  +badges: Doctrine\ORM\PersistentCollection {#2439 …}
  +children: []
  -id: 2887
  -titleTs: "'continu':8 'dim':9 'led':10 'power':4 'solv':3 'suppli':5 'whine':6"
  -bodyTs: "'12v':7,110 '25a':113 '9000hz':85 'abl':79 'achiev':81 'across':94 'allow':47 'also':33 'arduino':44 'best':75 'board':17 'breath':5 'cheapo':100 'claim':106 'complain':38 'control':10 'desktop':117 'dev':16 'emit':121 'esp32':13 'even':146 'extrem':67 'fix':135 'frequenc':52,61,144 'hear':34,90 'iflz44n':22 'led':8 'ledc':43 'librari':45 'low':63 'm':40 'mask':148 'mosfet':23 'output':109 'power':36,103,132 'project':2 'pwm':56 'replac':130 'resolut':54 'room':96 'see':29 'select':50 'set':59,71 'solid':101 'somehow':150 'sound':92 'state':102 'still':89 'strip':9 'suppli':37,104,118 'switch':19 'techniqu':140 'think':129 'total':134 'tri':115 'tune':142 'unfortun':86 'use':41 've':77 'video':26 'whine':65,123 'white':6 'work':31"
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  +ranking: 1696552699
  +visibility: "visible             "
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  +createdAt: DateTimeImmutable @1696467199 {#1858
    date: 2023-10-05 02:53:19.0 +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 {#1978 …}
  +magazine: App\Entity\Magazine {#264
    +icon: Proxies\__CG__\App\Entity\Image {#245 …}
    +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 {#274
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#236 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#232 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#221 …}
    +entries: Doctrine\ORM\PersistentCollection {#179 …}
    +posts: Doctrine\ORM\PersistentCollection {#137 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#199 …}
    +bans: Doctrine\ORM\PersistentCollection {#116 …}
    +reports: Doctrine\ORM\PersistentCollection {#102 …}
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      date: 2023-06-19 05:13:29.0 +02:00
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  +image: null
  +domain: Proxies\__CG__\App\Entity\Domain {#1889 …}
  +slug: "How-to-solve-power-supply-whine-with-continuous-dimming-LED"
  +title: "How to solve power supply whine with continuous dimming LED?"
  +url: "https://imgur.com/a/QKMl22Z"
  +body: """
    My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet.\n
    \n
    In my video you can see it working but also hear the power supply complaining.\n
    \n
    I’m using the LEDC Arduino library which allows me to select the frequency and resolution for PWM.\n
    \n
    If I set the frequency too low the whine is extreme, but at this setting it’s the best I’ve been able to achieve, which is about 9000Hz. Unfortunately you can still hear the sound from across the room!\n
    \n
    It is a cheapo solid state power supply that claims it can output 12v up to 25A. I tried my desktop supply and it emits some whine too, so I don’t think replacing the power will totally fix this.\n
    \n
    Is there a technique for tuning the frequency or even just masking it somehow?
    """
  +type: "link"
  +lang: "en"
  +isOc: false
  +hasEmbed: true
  +commentCount: 13
  +favouriteCount: 16
  +score: 0
  +isAdult: false
  +sticky: false
  +lastActive: DateTime @1696811953 {#2418
    date: 2023-10-09 02:39:13.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1688 …}
  +votes: Doctrine\ORM\PersistentCollection {#1966 …}
  +reports: Doctrine\ORM\PersistentCollection {#1965 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1368 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2426 …}
  +badges: Doctrine\ORM\PersistentCollection {#2439 …}
  +children: []
  -id: 2887
  -titleTs: "'continu':8 'dim':9 'led':10 'power':4 'solv':3 'suppli':5 'whine':6"
  -bodyTs: "'12v':7,110 '25a':113 '9000hz':85 'abl':79 'achiev':81 'across':94 'allow':47 'also':33 'arduino':44 'best':75 'board':17 'breath':5 'cheapo':100 'claim':106 'complain':38 'control':10 'desktop':117 'dev':16 'emit':121 'esp32':13 'even':146 'extrem':67 'fix':135 'frequenc':52,61,144 'hear':34,90 'iflz44n':22 'led':8 'ledc':43 'librari':45 'low':63 'm':40 'mask':148 'mosfet':23 'output':109 'power':36,103,132 'project':2 'pwm':56 'replac':130 'resolut':54 'room':96 'see':29 'select':50 'set':59,71 'solid':101 'somehow':150 'sound':92 'state':102 'still':89 'strip':9 'suppli':37,104,118 'switch':19 'techniqu':140 'think':129 'total':134 'tri':115 'tune':142 'unfortun':86 'use':41 've':77 'video':26 'whine':65,123 'white':6 'work':31"
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}
 
"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 {#1978 …}
  +magazine: App\Entity\Magazine {#264
    +icon: Proxies\__CG__\App\Entity\Image {#245 …}
    +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
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    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
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      date: 2024-10-20 10:40:08.0 +02:00
    }
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    +moderators: Doctrine\ORM\PersistentCollection {#236 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#232 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#221 …}
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  }
  +image: null
  +domain: Proxies\__CG__\App\Entity\Domain {#1889 …}
  +slug: "How-to-solve-power-supply-whine-with-continuous-dimming-LED"
  +title: "How to solve power supply whine with continuous dimming LED?"
  +url: "https://imgur.com/a/QKMl22Z"
  +body: """
    My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet.\n
    \n
    In my video you can see it working but also hear the power supply complaining.\n
    \n
    I’m using the LEDC Arduino library which allows me to select the frequency and resolution for PWM.\n
    \n
    If I set the frequency too low the whine is extreme, but at this setting it’s the best I’ve been able to achieve, which is about 9000Hz. Unfortunately you can still hear the sound from across the room!\n
    \n
    It is a cheapo solid state power supply that claims it can output 12v up to 25A. I tried my desktop supply and it emits some whine too, so I don’t think replacing the power will totally fix this.\n
    \n
    Is there a technique for tuning the frequency or even just masking it somehow?
    """
  +type: "link"
  +lang: "en"
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  +hasEmbed: true
  +commentCount: 13
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  +score: 0
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  +lastActive: DateTime @1696811953 {#2418
    date: 2023-10-09 02:39:13.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
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  +comments: Doctrine\ORM\PersistentCollection {#1688 …}
  +votes: Doctrine\ORM\PersistentCollection {#1966 …}
  +reports: Doctrine\ORM\PersistentCollection {#1965 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1368 …}
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  +badges: Doctrine\ORM\PersistentCollection {#2439 …}
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        -----\n
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      Is there a technique for tuning the frequency or even just masking it somehow?
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        -----\n
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      My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet.\n
      \n
      In my video you can see it working but also hear the power supply complaining.\n
      \n
      I’m using the LEDC Arduino library which allows me to select the frequency and resolution for PWM.\n
      \n
      If I set the frequency too low the whine is extreme, but at this setting it’s the best I’ve been able to achieve, which is about 9000Hz. Unfortunately you can still hear the sound from across the room!\n
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      It is a cheapo solid state power supply that claims it can output 12v up to 25A. I tried my desktop supply and it emits some whine too, so I don’t think replacing the power will totally fix this.\n
      \n
      Is there a technique for tuning the frequency or even just masking it somehow?
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      My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet.\n
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      I’m using the LEDC Arduino library which allows me to select the frequency and resolution for PWM.\n
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      If I set the frequency too low the whine is extreme, but at this setting it’s the best I’ve been able to achieve, which is about 9000Hz. Unfortunately you can still hear the sound from across the room!\n
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      It is a cheapo solid state power supply that claims it can output 12v up to 25A. I tried my desktop supply and it emits some whine too, so I don’t think replacing the power will totally fix this.\n
      \n
      Is there a technique for tuning the frequency or even just masking it somehow?
      """
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      My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet.\n
      \n
      In my video you can see it working but also hear the power supply complaining.\n
      \n
      I’m using the LEDC Arduino library which allows me to select the frequency and resolution for PWM.\n
      \n
      If I set the frequency too low the whine is extreme, but at this setting it’s the best I’ve been able to achieve, which is about 9000Hz. Unfortunately you can still hear the sound from across the room!\n
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      It is a cheapo solid state power supply that claims it can output 12v up to 25A. I tried my desktop supply and it emits some whine too, so I don’t think replacing the power will totally fix this.\n
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      Is there a technique for tuning the frequency or even just masking it somehow?
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    It might be doing the PWM in software somehow, making it useless for this kind of control.\n
    \n
    You could see if there’s some other class or library or option or particular pin that can use a pulse generator or timer to do PWM instead.\n
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        \n
        Rules\n
        -----\n
        \n
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        \n
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      My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet.\n
      \n
      In my video you can see it working but also hear the power supply complaining.\n
      \n
      I’m using the LEDC Arduino library which allows me to select the frequency and resolution for PWM.\n
      \n
      If I set the frequency too low the whine is extreme, but at this setting it’s the best I’ve been able to achieve, which is about 9000Hz. Unfortunately you can still hear the sound from across the room!\n
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    It might be doing the PWM in software somehow, making it useless for this kind of control.\n
    \n
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      My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet.\n
      \n
      In my video you can see it working but also hear the power supply complaining.\n
      \n
      I’m using the LEDC Arduino library which allows me to select the frequency and resolution for PWM.\n
      \n
      If I set the frequency too low the whine is extreme, but at this setting it’s the best I’ve been able to achieve, which is about 9000Hz. Unfortunately you can still hear the sound from across the room!\n
      \n
      It is a cheapo solid state power supply that claims it can output 12v up to 25A. I tried my desktop supply and it emits some whine too, so I don’t think replacing the power will totally fix this.\n
      \n
      Is there a technique for tuning the frequency or even just masking it somehow?
      """
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    It might be doing the PWM in software somehow, making it useless for this kind of control.\n
    \n
    You could see if there’s some other class or library or option or particular pin that can use a pulse generator or timer to do PWM instead.\n
    \n
    I’m not really familiar with the exact environment but that’s just what comes to mind.
    """
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        \n
        Rules\n
        -----\n
        \n
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      My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet.\n
      \n
      In my video you can see it working but also hear the power supply complaining.\n
      \n
      I’m using the LEDC Arduino library which allows me to select the frequency and resolution for PWM.\n
      \n
      If I set the frequency too low the whine is extreme, but at this setting it’s the best I’ve been able to achieve, which is about 9000Hz. Unfortunately you can still hear the sound from across the room!\n
      \n
      It is a cheapo solid state power supply that claims it can output 12v up to 25A. I tried my desktop supply and it emits some whine too, so I don’t think replacing the power will totally fix this.\n
      \n
      Is there a technique for tuning the frequency or even just masking it somehow?
      """
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    Are the changes in pitch alone, or does the amplitude change as well?\n
    \n
    What happens if you set the frequency to something extremely low? I know that 50Hz is unusable, it will flicker, but does something still hum at 50Hz? What about if you increase the frequency in steps until you approach 200Hz?\n
    \n
    Your multimeter couldn’t measure anything when you went to 25kHz? That *may* be an issue of the microcontroller not supplying enough current to charge the gate capacitance on the mosfet in time, or not drain it fast enough to turn it off. If you disconnect the esp from the rest of the circuit, can you measure something then?\n
    \n
    If yes, then you’ll want to use a push pull pair for driving the mosfet. Or get a mosfet driver, but a bc547/bc549 pair and a bit of passives will be fine, available in through hole, and considerably cheaper.\n
    \n
    If no, then either the esp can’t go that fast in this implementation (was it a software PWM?) or your multimeter doesn’t work in that range.
    """
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        Rules\n
        -----\n
        \n
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        \n
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      My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet.\n
      \n
      In my video you can see it working but also hear the power supply complaining.\n
      \n
      I’m using the LEDC Arduino library which allows me to select the frequency and resolution for PWM.\n
      \n
      If I set the frequency too low the whine is extreme, but at this setting it’s the best I’ve been able to achieve, which is about 9000Hz. Unfortunately you can still hear the sound from across the room!\n
      \n
      It is a cheapo solid state power supply that claims it can output 12v up to 25A. I tried my desktop supply and it emits some whine too, so I don’t think replacing the power will totally fix this.\n
      \n
      Is there a technique for tuning the frequency or even just masking it somehow?
      """
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    Are the changes in pitch alone, or does the amplitude change as well?\n
    \n
    What happens if you set the frequency to something extremely low? I know that 50Hz is unusable, it will flicker, but does something still hum at 50Hz? What about if you increase the frequency in steps until you approach 200Hz?\n
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    Your multimeter couldn’t measure anything when you went to 25kHz? That *may* be an issue of the microcontroller not supplying enough current to charge the gate capacitance on the mosfet in time, or not drain it fast enough to turn it off. If you disconnect the esp from the rest of the circuit, can you measure something then?\n
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    \n
    If no, then either the esp can’t go that fast in this implementation (was it a software PWM?) or your multimeter doesn’t work in that range.
    """
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    +slug: "How-to-solve-power-supply-whine-with-continuous-dimming-LED"
    +title: "How to solve power supply whine with continuous dimming LED?"
    +url: "https://imgur.com/a/QKMl22Z"
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      My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet.\n
      \n
      In my video you can see it working but also hear the power supply complaining.\n
      \n
      I’m using the LEDC Arduino library which allows me to select the frequency and resolution for PWM.\n
      \n
      If I set the frequency too low the whine is extreme, but at this setting it’s the best I’ve been able to achieve, which is about 9000Hz. Unfortunately you can still hear the sound from across the room!\n
      \n
      It is a cheapo solid state power supply that claims it can output 12v up to 25A. I tried my desktop supply and it emits some whine too, so I don’t think replacing the power will totally fix this.\n
      \n
      Is there a technique for tuning the frequency or even just masking it somehow?
      """
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    Are the changes in pitch alone, or does the amplitude change as well?\n
    \n
    What happens if you set the frequency to something extremely low? I know that 50Hz is unusable, it will flicker, but does something still hum at 50Hz? What about if you increase the frequency in steps until you approach 200Hz?\n
    \n
    Your multimeter couldn’t measure anything when you went to 25kHz? That *may* be an issue of the microcontroller not supplying enough current to charge the gate capacitance on the mosfet in time, or not drain it fast enough to turn it off. If you disconnect the esp from the rest of the circuit, can you measure something then?\n
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    \n
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21 DENIED edit 
App\Entity\Magazine {#264
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    \n
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    -----\n
    \n
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    \n
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