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moderate
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Proxies\__CG__\App\Entity\Entry {#2278
+user: Proxies\__CG__\App\Entity\User {#2635 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2495 …}
+slug: "Temporary-pull-up-during-boot-ESP-01"
+title: "Temporary pull-up during boot (ESP-01)"
+url: null
+body: """
Hi everyone!\n
\n
I’m trying to control a “dumb” led light strip segment with an ESP-01S. This is fairly low current, the strip will pull 150mA-200mA max (depends on… artistic? needs).\n
\n
I have two NPN transistors (2N2222), one to control the 12V supply to the white “channel” and the other the red+blue (don’t need the green).\n
\n
I had to pull-down the gates as I had some flickering, and it works perfectly if I manually connect the GPIOs **after** the ESP-01S boots.\n
\n
The ESP will boot if I have the RX pin (GPIO03) pulled down on boot, but not if I pull down any of the others.\n
\n
I’m not smart enough to come up with a way to have that extra pin I need to be high only during boot, while the gate it’s attached to needs to be pulled down…\n
\n
Any thought, other than getting something with more IO pins?
"""
+type: "article"
+lang: "en"
+isOc: false
+hasEmbed: false
+commentCount: 6
+favouriteCount: 15
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+lastActive: DateTime @1702611105 {#2669
date: 2023-12-15 04:31:45.0 +01:00
}
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+comments: Doctrine\ORM\PersistentCollection {#2674 …}
+votes: Doctrine\ORM\PersistentCollection {#2677 …}
+reports: Doctrine\ORM\PersistentCollection {#2679 …}
+favourites: Doctrine\ORM\PersistentCollection {#2681 …}
+notifications: Doctrine\ORM\PersistentCollection {#2683 …}
+badges: Doctrine\ORM\PersistentCollection {#2685 …}
+children: [
App\Entity\EntryComment {#2282
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2278 …2}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: Proxies\__CG__\App\Entity\EntryComment {#2276 …}
+root: Proxies\__CG__\App\Entity\EntryComment {#2279 …}
+body: "As you said before power on capacitor is discharged. Right after power on capacitor is still discharged, so voltage on capacitor is zero, so reset pin has Vcc. With time capacitor gets charges and voltage across capacitor increases and reset voltage becomes closer and closer to ground, until it is ground. But it is important to consider what happens at power down too. At power down capacitor is charged. If power source becomes high impedance at power down, then reset pin will probably go down to zero in time but may take a bit time depending on what source exactly does. But if power source is connected to zero at power down reset pin will observe minus vcc and slowly go up to 0. If reset pin is sensitive it may be a good idea to protect it with a diode."
+lang: "en"
+isAdult: false
+favouriteCount: 1
+score: 0
+lastActive: DateTime @1702408765 {#2283
date: 2023-12-12 20:19:25.0 +01:00
}
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+tags: null
+mentions: [
"@ByteJunk@lemmy.world"
"@HewlettHackard@lemmy.ca"
]
+children: Doctrine\ORM\PersistentCollection {#2275 …}
+nested: Doctrine\ORM\PersistentCollection {#2261 …}
+votes: Doctrine\ORM\PersistentCollection {#2218 …}
+reports: Doctrine\ORM\PersistentCollection {#2221 …}
+favourites: Doctrine\ORM\PersistentCollection {#2217 …}
+notifications: Doctrine\ORM\PersistentCollection {#2199 …}
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+ranking: 0
+commentCount: 0
+upVotes: 0
+downVotes: 0
+visibility: "visible "
+apId: "https://discuss.tchncs.de/comment/5659024"
+editedAt: null
+createdAt: DateTimeImmutable @1702408765 {#2280
date: 2023-12-12 20:19:25.0 +01:00
}
+"title": 219037
}
]
-id: 21809
-titleTs: "'-01':8 'boot':6 'esp':7 'pull':3 'pull-up':2 'temporari':1"
-bodyTs: "'01s':18,90 '12v':46 '150ma':29 '150ma-200ma':28 '200ma':30 '2n2222':41 'artist':34 'attach':146 'blue':57 'boot':91,95,106,140 'channel':51 'come':123 'connect':83 'control':7,44 'current':23 'depend':32 'dumb':9 'enough':121 'esp':17,89,93 'esp-01s':16,88 'everyon':2 'extra':131 'fair':21 'flicker':75 'gate':70,143 'get':157 'gpio':85 'gpio03':102 'green':62 'hi':1 'high':137 'io':161 'led':10 'light':11 'low':22 'm':4,118 'manual':82 'max':31 'need':35,60,134,148 'npn':39 'one':42 'other':116 'perfect':79 'pin':101,132,162 'pull':27,67,103,111,151 'pull-down':66 'red':56 'rx':100 'segment':13 'smart':120 'someth':158 'strip':12,25 'suppli':47 'thought':154 'transistor':40 'tri':5 'two':38 'way':127 'white':50 'work':78"
+cross: false
+upVotes: 0
+downVotes: 0
+ranking: 1702440954
+visibility: "visible "
+apId: "https://lemmy.world/post/9476741"
+editedAt: null
+createdAt: DateTimeImmutable @1702385454 {#2658
date: 2023-12-12 13:50:54.0 +01:00
}
+__isInitialized__: true
…2
} |
|
Show voter details
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edit
|
Proxies\__CG__\App\Entity\Entry {#2278
+user: Proxies\__CG__\App\Entity\User {#2635 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2495 …}
+slug: "Temporary-pull-up-during-boot-ESP-01"
+title: "Temporary pull-up during boot (ESP-01)"
+url: null
+body: """
Hi everyone!\n
\n
I’m trying to control a “dumb” led light strip segment with an ESP-01S. This is fairly low current, the strip will pull 150mA-200mA max (depends on… artistic? needs).\n
\n
I have two NPN transistors (2N2222), one to control the 12V supply to the white “channel” and the other the red+blue (don’t need the green).\n
\n
I had to pull-down the gates as I had some flickering, and it works perfectly if I manually connect the GPIOs **after** the ESP-01S boots.\n
\n
The ESP will boot if I have the RX pin (GPIO03) pulled down on boot, but not if I pull down any of the others.\n
\n
I’m not smart enough to come up with a way to have that extra pin I need to be high only during boot, while the gate it’s attached to needs to be pulled down…\n
\n
Any thought, other than getting something with more IO pins?
"""
+type: "article"
+lang: "en"
+isOc: false
+hasEmbed: false
+commentCount: 6
+favouriteCount: 15
+score: 0
+isAdult: false
+sticky: false
+lastActive: DateTime @1702611105 {#2669
date: 2023-12-15 04:31:45.0 +01:00
}
+ip: null
+adaAmount: 0
+tags: null
+mentions: null
+comments: Doctrine\ORM\PersistentCollection {#2674 …}
+votes: Doctrine\ORM\PersistentCollection {#2677 …}
+reports: Doctrine\ORM\PersistentCollection {#2679 …}
+favourites: Doctrine\ORM\PersistentCollection {#2681 …}
+notifications: Doctrine\ORM\PersistentCollection {#2683 …}
+badges: Doctrine\ORM\PersistentCollection {#2685 …}
+children: [
App\Entity\EntryComment {#2282
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2278 …2}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: Proxies\__CG__\App\Entity\EntryComment {#2276 …}
+root: Proxies\__CG__\App\Entity\EntryComment {#2279 …}
+body: "As you said before power on capacitor is discharged. Right after power on capacitor is still discharged, so voltage on capacitor is zero, so reset pin has Vcc. With time capacitor gets charges and voltage across capacitor increases and reset voltage becomes closer and closer to ground, until it is ground. But it is important to consider what happens at power down too. At power down capacitor is charged. If power source becomes high impedance at power down, then reset pin will probably go down to zero in time but may take a bit time depending on what source exactly does. But if power source is connected to zero at power down reset pin will observe minus vcc and slowly go up to 0. If reset pin is sensitive it may be a good idea to protect it with a diode."
+lang: "en"
+isAdult: false
+favouriteCount: 1
+score: 0
+lastActive: DateTime @1702408765 {#2283
date: 2023-12-12 20:19:25.0 +01:00
}
+ip: null
+tags: null
+mentions: [
"@ByteJunk@lemmy.world"
"@HewlettHackard@lemmy.ca"
]
+children: Doctrine\ORM\PersistentCollection {#2275 …}
+nested: Doctrine\ORM\PersistentCollection {#2261 …}
+votes: Doctrine\ORM\PersistentCollection {#2218 …}
+reports: Doctrine\ORM\PersistentCollection {#2221 …}
+favourites: Doctrine\ORM\PersistentCollection {#2217 …}
+notifications: Doctrine\ORM\PersistentCollection {#2199 …}
-id: 219037
-bodyTs: "'0':124 'across':36 'becom':42,73 'bit':94 'capacitor':7,14,21,31,37,67 'charg':33,69 'closer':43,45 'connect':107 'consid':57 'depend':96 'diod':141 'discharg':9,17 'exact':100 'get':32 'go':84,121 'good':134 'ground':47,51 'happen':59 'high':74 'idea':135 'imped':75 'import':55 'increas':38 'may':91,131 'minus':117 'observ':116 'pin':26,81,114,127 'power':5,12,61,65,71,77,104,111 'probabl':83 'protect':137 'reset':25,40,80,113,126 'right':10 'said':3 'sensit':129 'slowli':120 'sourc':72,99,105 'still':16 'take':92 'time':30,89,95 'vcc':28,118 'voltag':19,35,41 'zero':23,87,109"
+ranking: 0
+commentCount: 0
+upVotes: 0
+downVotes: 0
+visibility: "visible "
+apId: "https://discuss.tchncs.de/comment/5659024"
+editedAt: null
+createdAt: DateTimeImmutable @1702408765 {#2280
date: 2023-12-12 20:19:25.0 +01:00
}
+"title": 219037
}
]
-id: 21809
-titleTs: "'-01':8 'boot':6 'esp':7 'pull':3 'pull-up':2 'temporari':1"
-bodyTs: "'01s':18,90 '12v':46 '150ma':29 '150ma-200ma':28 '200ma':30 '2n2222':41 'artist':34 'attach':146 'blue':57 'boot':91,95,106,140 'channel':51 'come':123 'connect':83 'control':7,44 'current':23 'depend':32 'dumb':9 'enough':121 'esp':17,89,93 'esp-01s':16,88 'everyon':2 'extra':131 'fair':21 'flicker':75 'gate':70,143 'get':157 'gpio':85 'gpio03':102 'green':62 'hi':1 'high':137 'io':161 'led':10 'light':11 'low':22 'm':4,118 'manual':82 'max':31 'need':35,60,134,148 'npn':39 'one':42 'other':116 'perfect':79 'pin':101,132,162 'pull':27,67,103,111,151 'pull-down':66 'red':56 'rx':100 'segment':13 'smart':120 'someth':158 'strip':12,25 'suppli':47 'thought':154 'transistor':40 'tri':5 'two':38 'way':127 'white':50 'work':78"
+cross: false
+upVotes: 0
+downVotes: 0
+ranking: 1702440954
+visibility: "visible "
+apId: "https://lemmy.world/post/9476741"
+editedAt: null
+createdAt: DateTimeImmutable @1702385454 {#2658
date: 2023-12-12 13:50:54.0 +01:00
}
+__isInitialized__: true
…2
} |
|
Show voter details
|
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moderate
|
Proxies\__CG__\App\Entity\Entry {#2278
+user: Proxies\__CG__\App\Entity\User {#2635 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2495 …}
+slug: "Temporary-pull-up-during-boot-ESP-01"
+title: "Temporary pull-up during boot (ESP-01)"
+url: null
+body: """
Hi everyone!\n
\n
I’m trying to control a “dumb” led light strip segment with an ESP-01S. This is fairly low current, the strip will pull 150mA-200mA max (depends on… artistic? needs).\n
\n
I have two NPN transistors (2N2222), one to control the 12V supply to the white “channel” and the other the red+blue (don’t need the green).\n
\n
I had to pull-down the gates as I had some flickering, and it works perfectly if I manually connect the GPIOs **after** the ESP-01S boots.\n
\n
The ESP will boot if I have the RX pin (GPIO03) pulled down on boot, but not if I pull down any of the others.\n
\n
I’m not smart enough to come up with a way to have that extra pin I need to be high only during boot, while the gate it’s attached to needs to be pulled down…\n
\n
Any thought, other than getting something with more IO pins?
"""
+type: "article"
+lang: "en"
+isOc: false
+hasEmbed: false
+commentCount: 6
+favouriteCount: 15
+score: 0
+isAdult: false
+sticky: false
+lastActive: DateTime @1702611105 {#2669
date: 2023-12-15 04:31:45.0 +01:00
}
+ip: null
+adaAmount: 0
+tags: null
+mentions: null
+comments: Doctrine\ORM\PersistentCollection {#2674 …}
+votes: Doctrine\ORM\PersistentCollection {#2677 …}
+reports: Doctrine\ORM\PersistentCollection {#2679 …}
+favourites: Doctrine\ORM\PersistentCollection {#2681 …}
+notifications: Doctrine\ORM\PersistentCollection {#2683 …}
+badges: Doctrine\ORM\PersistentCollection {#2685 …}
+children: [
App\Entity\EntryComment {#2282
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2278 …2}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: Proxies\__CG__\App\Entity\EntryComment {#2276 …}
+root: Proxies\__CG__\App\Entity\EntryComment {#2279 …}
+body: "As you said before power on capacitor is discharged. Right after power on capacitor is still discharged, so voltage on capacitor is zero, so reset pin has Vcc. With time capacitor gets charges and voltage across capacitor increases and reset voltage becomes closer and closer to ground, until it is ground. But it is important to consider what happens at power down too. At power down capacitor is charged. If power source becomes high impedance at power down, then reset pin will probably go down to zero in time but may take a bit time depending on what source exactly does. But if power source is connected to zero at power down reset pin will observe minus vcc and slowly go up to 0. If reset pin is sensitive it may be a good idea to protect it with a diode."
+lang: "en"
+isAdult: false
+favouriteCount: 1
+score: 0
+lastActive: DateTime @1702408765 {#2283
date: 2023-12-12 20:19:25.0 +01:00
}
+ip: null
+tags: null
+mentions: [
"@ByteJunk@lemmy.world"
"@HewlettHackard@lemmy.ca"
]
+children: Doctrine\ORM\PersistentCollection {#2275 …}
+nested: Doctrine\ORM\PersistentCollection {#2261 …}
+votes: Doctrine\ORM\PersistentCollection {#2218 …}
+reports: Doctrine\ORM\PersistentCollection {#2221 …}
+favourites: Doctrine\ORM\PersistentCollection {#2217 …}
+notifications: Doctrine\ORM\PersistentCollection {#2199 …}
-id: 219037
-bodyTs: "'0':124 'across':36 'becom':42,73 'bit':94 'capacitor':7,14,21,31,37,67 'charg':33,69 'closer':43,45 'connect':107 'consid':57 'depend':96 'diod':141 'discharg':9,17 'exact':100 'get':32 'go':84,121 'good':134 'ground':47,51 'happen':59 'high':74 'idea':135 'imped':75 'import':55 'increas':38 'may':91,131 'minus':117 'observ':116 'pin':26,81,114,127 'power':5,12,61,65,71,77,104,111 'probabl':83 'protect':137 'reset':25,40,80,113,126 'right':10 'said':3 'sensit':129 'slowli':120 'sourc':72,99,105 'still':16 'take':92 'time':30,89,95 'vcc':28,118 'voltag':19,35,41 'zero':23,87,109"
+ranking: 0
+commentCount: 0
+upVotes: 0
+downVotes: 0
+visibility: "visible "
+apId: "https://discuss.tchncs.de/comment/5659024"
+editedAt: null
+createdAt: DateTimeImmutable @1702408765 {#2280
date: 2023-12-12 20:19:25.0 +01:00
}
+"title": 219037
}
]
-id: 21809
-titleTs: "'-01':8 'boot':6 'esp':7 'pull':3 'pull-up':2 'temporari':1"
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+cross: false
+upVotes: 0
+downVotes: 0
+ranking: 1702440954
+visibility: "visible "
+apId: "https://lemmy.world/post/9476741"
+editedAt: null
+createdAt: DateTimeImmutable @1702385454 {#2658
date: 2023-12-12 13:50:54.0 +01:00
}
+__isInitialized__: true
…2
} |
|
Show voter details
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moderate
|
App\Entity\EntryComment {#2282
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2278
+user: Proxies\__CG__\App\Entity\User {#2635 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2495 …}
+slug: "Temporary-pull-up-during-boot-ESP-01"
+title: "Temporary pull-up during boot (ESP-01)"
+url: null
+body: """
Hi everyone!\n
\n
I’m trying to control a “dumb” led light strip segment with an ESP-01S. This is fairly low current, the strip will pull 150mA-200mA max (depends on… artistic? needs).\n
\n
I have two NPN transistors (2N2222), one to control the 12V supply to the white “channel” and the other the red+blue (don’t need the green).\n
\n
I had to pull-down the gates as I had some flickering, and it works perfectly if I manually connect the GPIOs **after** the ESP-01S boots.\n
\n
The ESP will boot if I have the RX pin (GPIO03) pulled down on boot, but not if I pull down any of the others.\n
\n
I’m not smart enough to come up with a way to have that extra pin I need to be high only during boot, while the gate it’s attached to needs to be pulled down…\n
\n
Any thought, other than getting something with more IO pins?
"""
+type: "article"
+lang: "en"
+isOc: false
+hasEmbed: false
+commentCount: 6
+favouriteCount: 15
+score: 0
+isAdult: false
+sticky: false
+lastActive: DateTime @1702611105 {#2669
date: 2023-12-15 04:31:45.0 +01:00
}
+ip: null
+adaAmount: 0
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+comments: Doctrine\ORM\PersistentCollection {#2674 …}
+votes: Doctrine\ORM\PersistentCollection {#2677 …}
+reports: Doctrine\ORM\PersistentCollection {#2679 …}
+favourites: Doctrine\ORM\PersistentCollection {#2681 …}
+notifications: Doctrine\ORM\PersistentCollection {#2683 …}
+badges: Doctrine\ORM\PersistentCollection {#2685 …}
+children: [
App\Entity\EntryComment {#2282}
]
-id: 21809
-titleTs: "'-01':8 'boot':6 'esp':7 'pull':3 'pull-up':2 'temporari':1"
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+cross: false
+upVotes: 0
+downVotes: 0
+ranking: 1702440954
+visibility: "visible "
+apId: "https://lemmy.world/post/9476741"
+editedAt: null
+createdAt: DateTimeImmutable @1702385454 {#2658
date: 2023-12-12 13:50:54.0 +01:00
}
+__isInitialized__: true
…2
}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: Proxies\__CG__\App\Entity\EntryComment {#2276 …}
+root: Proxies\__CG__\App\Entity\EntryComment {#2279 …}
+body: "As you said before power on capacitor is discharged. Right after power on capacitor is still discharged, so voltage on capacitor is zero, so reset pin has Vcc. With time capacitor gets charges and voltage across capacitor increases and reset voltage becomes closer and closer to ground, until it is ground. But it is important to consider what happens at power down too. At power down capacitor is charged. If power source becomes high impedance at power down, then reset pin will probably go down to zero in time but may take a bit time depending on what source exactly does. But if power source is connected to zero at power down reset pin will observe minus vcc and slowly go up to 0. If reset pin is sensitive it may be a good idea to protect it with a diode."
+lang: "en"
+isAdult: false
+favouriteCount: 1
+score: 0
+lastActive: DateTime @1702408765 {#2283
date: 2023-12-12 20:19:25.0 +01:00
}
+ip: null
+tags: null
+mentions: [
"@ByteJunk@lemmy.world"
"@HewlettHackard@lemmy.ca"
]
+children: Doctrine\ORM\PersistentCollection {#2275 …}
+nested: Doctrine\ORM\PersistentCollection {#2261 …}
+votes: Doctrine\ORM\PersistentCollection {#2218 …}
+reports: Doctrine\ORM\PersistentCollection {#2221 …}
+favourites: Doctrine\ORM\PersistentCollection {#2217 …}
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-id: 219037
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+ranking: 0
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+downVotes: 0
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+apId: "https://discuss.tchncs.de/comment/5659024"
+editedAt: null
+createdAt: DateTimeImmutable @1702408765 {#2280
date: 2023-12-12 20:19:25.0 +01:00
}
+"title": 219037
} |
|
Show voter details
|
7 |
DENIED
|
edit
|
App\Entity\EntryComment {#2282
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2278
+user: Proxies\__CG__\App\Entity\User {#2635 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2495 …}
+slug: "Temporary-pull-up-during-boot-ESP-01"
+title: "Temporary pull-up during boot (ESP-01)"
+url: null
+body: """
Hi everyone!\n
\n
I’m trying to control a “dumb” led light strip segment with an ESP-01S. This is fairly low current, the strip will pull 150mA-200mA max (depends on… artistic? needs).\n
\n
I have two NPN transistors (2N2222), one to control the 12V supply to the white “channel” and the other the red+blue (don’t need the green).\n
\n
I had to pull-down the gates as I had some flickering, and it works perfectly if I manually connect the GPIOs **after** the ESP-01S boots.\n
\n
The ESP will boot if I have the RX pin (GPIO03) pulled down on boot, but not if I pull down any of the others.\n
\n
I’m not smart enough to come up with a way to have that extra pin I need to be high only during boot, while the gate it’s attached to needs to be pulled down…\n
\n
Any thought, other than getting something with more IO pins?
"""
+type: "article"
+lang: "en"
+isOc: false
+hasEmbed: false
+commentCount: 6
+favouriteCount: 15
+score: 0
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date: 2023-12-15 04:31:45.0 +01:00
}
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+adaAmount: 0
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+comments: Doctrine\ORM\PersistentCollection {#2674 …}
+votes: Doctrine\ORM\PersistentCollection {#2677 …}
+reports: Doctrine\ORM\PersistentCollection {#2679 …}
+favourites: Doctrine\ORM\PersistentCollection {#2681 …}
+notifications: Doctrine\ORM\PersistentCollection {#2683 …}
+badges: Doctrine\ORM\PersistentCollection {#2685 …}
+children: [
App\Entity\EntryComment {#2282}
]
-id: 21809
-titleTs: "'-01':8 'boot':6 'esp':7 'pull':3 'pull-up':2 'temporari':1"
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+ranking: 1702440954
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+editedAt: null
+createdAt: DateTimeImmutable @1702385454 {#2658
date: 2023-12-12 13:50:54.0 +01:00
}
+__isInitialized__: true
…2
}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: Proxies\__CG__\App\Entity\EntryComment {#2276 …}
+root: Proxies\__CG__\App\Entity\EntryComment {#2279 …}
+body: "As you said before power on capacitor is discharged. Right after power on capacitor is still discharged, so voltage on capacitor is zero, so reset pin has Vcc. With time capacitor gets charges and voltage across capacitor increases and reset voltage becomes closer and closer to ground, until it is ground. But it is important to consider what happens at power down too. At power down capacitor is charged. If power source becomes high impedance at power down, then reset pin will probably go down to zero in time but may take a bit time depending on what source exactly does. But if power source is connected to zero at power down reset pin will observe minus vcc and slowly go up to 0. If reset pin is sensitive it may be a good idea to protect it with a diode."
+lang: "en"
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date: 2023-12-12 20:19:25.0 +01:00
}
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"@ByteJunk@lemmy.world"
"@HewlettHackard@lemmy.ca"
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+votes: Doctrine\ORM\PersistentCollection {#2218 …}
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+ranking: 0
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+visibility: "visible "
+apId: "https://discuss.tchncs.de/comment/5659024"
+editedAt: null
+createdAt: DateTimeImmutable @1702408765 {#2280
date: 2023-12-12 20:19:25.0 +01:00
}
+"title": 219037
} |
|
Show voter details
|
8 |
DENIED
|
moderate
|
App\Entity\EntryComment {#2282
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2278
+user: Proxies\__CG__\App\Entity\User {#2635 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2495 …}
+slug: "Temporary-pull-up-during-boot-ESP-01"
+title: "Temporary pull-up during boot (ESP-01)"
+url: null
+body: """
Hi everyone!\n
\n
I’m trying to control a “dumb” led light strip segment with an ESP-01S. This is fairly low current, the strip will pull 150mA-200mA max (depends on… artistic? needs).\n
\n
I have two NPN transistors (2N2222), one to control the 12V supply to the white “channel” and the other the red+blue (don’t need the green).\n
\n
I had to pull-down the gates as I had some flickering, and it works perfectly if I manually connect the GPIOs **after** the ESP-01S boots.\n
\n
The ESP will boot if I have the RX pin (GPIO03) pulled down on boot, but not if I pull down any of the others.\n
\n
I’m not smart enough to come up with a way to have that extra pin I need to be high only during boot, while the gate it’s attached to needs to be pulled down…\n
\n
Any thought, other than getting something with more IO pins?
"""
+type: "article"
+lang: "en"
+isOc: false
+hasEmbed: false
+commentCount: 6
+favouriteCount: 15
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date: 2023-12-15 04:31:45.0 +01:00
}
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+favourites: Doctrine\ORM\PersistentCollection {#2681 …}
+notifications: Doctrine\ORM\PersistentCollection {#2683 …}
+badges: Doctrine\ORM\PersistentCollection {#2685 …}
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App\Entity\EntryComment {#2282}
]
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+cross: false
+upVotes: 0
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+ranking: 1702440954
+visibility: "visible "
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+editedAt: null
+createdAt: DateTimeImmutable @1702385454 {#2658
date: 2023-12-12 13:50:54.0 +01:00
}
+__isInitialized__: true
…2
}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: Proxies\__CG__\App\Entity\EntryComment {#2276 …}
+root: Proxies\__CG__\App\Entity\EntryComment {#2279 …}
+body: "As you said before power on capacitor is discharged. Right after power on capacitor is still discharged, so voltage on capacitor is zero, so reset pin has Vcc. With time capacitor gets charges and voltage across capacitor increases and reset voltage becomes closer and closer to ground, until it is ground. But it is important to consider what happens at power down too. At power down capacitor is charged. If power source becomes high impedance at power down, then reset pin will probably go down to zero in time but may take a bit time depending on what source exactly does. But if power source is connected to zero at power down reset pin will observe minus vcc and slowly go up to 0. If reset pin is sensitive it may be a good idea to protect it with a diode."
+lang: "en"
+isAdult: false
+favouriteCount: 1
+score: 0
+lastActive: DateTime @1702408765 {#2283
date: 2023-12-12 20:19:25.0 +01:00
}
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+mentions: [
"@ByteJunk@lemmy.world"
"@HewlettHackard@lemmy.ca"
]
+children: Doctrine\ORM\PersistentCollection {#2275 …}
+nested: Doctrine\ORM\PersistentCollection {#2261 …}
+votes: Doctrine\ORM\PersistentCollection {#2218 …}
+reports: Doctrine\ORM\PersistentCollection {#2221 …}
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+notifications: Doctrine\ORM\PersistentCollection {#2199 …}
-id: 219037
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+ranking: 0
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+visibility: "visible "
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+editedAt: null
+createdAt: DateTimeImmutable @1702408765 {#2280
date: 2023-12-12 20:19:25.0 +01:00
}
+"title": 219037
} |
|
Show voter details
|
9 |
DENIED
|
ROLE_USER
|
null |
|
Show voter details
|
10 |
DENIED
|
moderate
|
Proxies\__CG__\App\Entity\Entry {#2304
+user: Proxies\__CG__\App\Entity\User {#2540 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: Proxies\__CG__\App\Entity\Image {#2578 …}
+domain: Proxies\__CG__\App\Entity\Domain {#2580 …}
+slug: "PCB-Review-Request-ESP32-small-usb-board"
+title: "[PCB Review Request] ESP32 small usb board"
+url: "https://postimg.cc/gallery/HnVZxSX"
+body: """
The purpose of this PCB is to be small, have ok RF performance, and use USB as main power-source and interface. (Off course it has UART if USB is not available) this is just a somewhat challenge I set myself to design a esp32 PCB with the IC without a already made module.\n
\n
Link to gallery: [postimg.cc/gallery/HnVZxSX](https://postimg.cc/gallery/HnVZxSX)Excuse the quality of the images, Im quite new to exporting PCB from kicad.
"""
+type: "link"
+lang: "en"
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date: 2023-10-31 07:45:37.0 +01:00
}
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App\Entity\EntryComment {#2305
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+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
+root: null
+body: "Depending on the power consumption, you may consider not using thermal relief while connecting thermal vias for the chip (component 57) to ground layers. But this may make soldering harder so do it only if needed. Thermal vias are so close that they form 3 long dents in 3v3 plane. It is good practice to put vias a little far apart so that planes can go through between vias. This can be important since sometimes lowest impedance can be obtained when current is flowing between those vias. If you don’t need to fit 15 vias there, you may consider reducing the number and separating them a bit. You can also check the design rules for minimum copper width and minimum via clearance for your manufacturer and enter them in your CAD tool."
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date: 2023-10-30 14:44:19.0 +01:00
}
+__isInitialized__: true
…2
} |
|
Show voter details
|
11 |
DENIED
|
edit
|
Proxies\__CG__\App\Entity\Entry {#2304
+user: Proxies\__CG__\App\Entity\User {#2540 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: Proxies\__CG__\App\Entity\Image {#2578 …}
+domain: Proxies\__CG__\App\Entity\Domain {#2580 …}
+slug: "PCB-Review-Request-ESP32-small-usb-board"
+title: "[PCB Review Request] ESP32 small usb board"
+url: "https://postimg.cc/gallery/HnVZxSX"
+body: """
The purpose of this PCB is to be small, have ok RF performance, and use USB as main power-source and interface. (Off course it has UART if USB is not available) this is just a somewhat challenge I set myself to design a esp32 PCB with the IC without a already made module.\n
\n
Link to gallery: [postimg.cc/gallery/HnVZxSX](https://postimg.cc/gallery/HnVZxSX)Excuse the quality of the images, Im quite new to exporting PCB from kicad.
"""
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+image: null
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+body: "Depending on the power consumption, you may consider not using thermal relief while connecting thermal vias for the chip (component 57) to ground layers. But this may make soldering harder so do it only if needed. Thermal vias are so close that they form 3 long dents in 3v3 plane. It is good practice to put vias a little far apart so that planes can go through between vias. This can be important since sometimes lowest impedance can be obtained when current is flowing between those vias. If you don’t need to fit 15 vias there, you may consider reducing the number and separating them a bit. You can also check the design rules for minimum copper width and minimum via clearance for your manufacturer and enter them in your CAD tool."
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]
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Show voter details
|
12 |
DENIED
|
moderate
|
Proxies\__CG__\App\Entity\Entry {#2304
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The purpose of this PCB is to be small, have ok RF performance, and use USB as main power-source and interface. (Off course it has UART if USB is not available) this is just a somewhat challenge I set myself to design a esp32 PCB with the IC without a already made module.\n
\n
Link to gallery: [postimg.cc/gallery/HnVZxSX](https://postimg.cc/gallery/HnVZxSX)Excuse the quality of the images, Im quite new to exporting PCB from kicad.
"""
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Show voter details
|
13 |
DENIED
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ROLE_USER
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null |
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Show voter details
|
14 |
DENIED
|
moderate
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App\Entity\EntryComment {#2305
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The purpose of this PCB is to be small, have ok RF performance, and use USB as main power-source and interface. (Off course it has UART if USB is not available) this is just a somewhat challenge I set myself to design a esp32 PCB with the IC without a already made module.\n
\n
Link to gallery: [postimg.cc/gallery/HnVZxSX](https://postimg.cc/gallery/HnVZxSX)Excuse the quality of the images, Im quite new to exporting PCB from kicad.
"""
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date: 2023-10-31 07:45:37.0 +01:00
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} |
|
Show voter details
|
15 |
DENIED
|
edit
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App\Entity\EntryComment {#2305
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+url: "https://postimg.cc/gallery/HnVZxSX"
+body: """
The purpose of this PCB is to be small, have ok RF performance, and use USB as main power-source and interface. (Off course it has UART if USB is not available) this is just a somewhat challenge I set myself to design a esp32 PCB with the IC without a already made module.\n
\n
Link to gallery: [postimg.cc/gallery/HnVZxSX](https://postimg.cc/gallery/HnVZxSX)Excuse the quality of the images, Im quite new to exporting PCB from kicad.
"""
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} |
|
Show voter details
|
16 |
DENIED
|
moderate
|
App\Entity\EntryComment {#2305
+user: App\Entity\User {#264 …}
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+url: "https://postimg.cc/gallery/HnVZxSX"
+body: """
The purpose of this PCB is to be small, have ok RF performance, and use USB as main power-source and interface. (Off course it has UART if USB is not available) this is just a somewhat challenge I set myself to design a esp32 PCB with the IC without a already made module.\n
\n
Link to gallery: [postimg.cc/gallery/HnVZxSX](https://postimg.cc/gallery/HnVZxSX)Excuse the quality of the images, Im quite new to exporting PCB from kicad.
"""
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Show voter details
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17 |
DENIED
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ROLE_USER
|
null |
|
Show voter details
|
18 |
DENIED
|
moderate
|
Proxies\__CG__\App\Entity\Entry {#2311
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19 |
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Show voter details
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20 |
DENIED
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Proxies\__CG__\App\Entity\Entry {#2311
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21 |
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ROLE_USER
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Show voter details
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22 |
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moderate
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App\Entity\EntryComment {#2299
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Show voter details
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23 |
DENIED
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edit
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App\Entity\EntryComment {#2299
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Show voter details
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24 |
DENIED
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moderate
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App\Entity\EntryComment {#2299
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Show voter details
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25 |
DENIED
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ROLE_USER
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Show voter details
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26 |
DENIED
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moderate
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Proxies\__CG__\App\Entity\Entry {#2108
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27 |
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Show voter details
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28 |
DENIED
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Proxies\__CG__\App\Entity\Entry {#2108
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Show voter details
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29 |
DENIED
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ROLE_USER
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Show voter details
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30 |
DENIED
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moderate
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App\Entity\EntryComment {#2105
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31 |
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32 |
DENIED
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33 |
DENIED
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ROLE_USER
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Show voter details
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34 |
DENIED
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moderate
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Show voter details
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35 |
DENIED
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edit
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37 |
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Show voter details
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38 |
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39 |
DENIED
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App\Entity\EntryComment {#2113
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40 |
DENIED
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App\Entity\EntryComment {#2113
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Show voter details
|
41 |
DENIED
|
ROLE_USER
|
null |
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Show voter details
|
42 |
DENIED
|
moderate
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App\Entity\Entry {#1737
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
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As solder bump pitches shrink, several issues arise. Reduced bump height and surface area for bonding make it increasingly difficult to establish reliable electrical connections, necessitating precise manufacturing processes to avoid errors. Critical co-planarity and surface roughness become paramount, as even minor irregularities can compromise successful bonding.\n
\n
To overcome these issues, Cu-Cu hybrid bonding technology steps in as a game-changer. This innovative technique involves embedding metal contacts between dielectric materials and using heat treatment for solid-state diffusion of copper atoms, thereby eliminating the bridging problem associated with soldering.\n
\n
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"""
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date: 2023-09-16 16:22:01.0 +02:00
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} |
|
Show voter details
|
43 |
DENIED
|
edit
|
App\Entity\Entry {#1737
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#1734 …}
+slug: "Advancing-Cu-Cu-Hybrid-Bonding-Overcoming-Challenges-for-the-Future-of"
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+url: "https://www.microwavejournal.com/articles/40845-advancing-cu-cu-hybrid-bonding-overcoming-challenges-for-the-future-of-semiconductor-packaging"
+body: """
As solder bump pitches shrink, several issues arise. Reduced bump height and surface area for bonding make it increasingly difficult to establish reliable electrical connections, necessitating precise manufacturing processes to avoid errors. Critical co-planarity and surface roughness become paramount, as even minor irregularities can compromise successful bonding.\n
\n
To overcome these issues, Cu-Cu hybrid bonding technology steps in as a game-changer. This innovative technique involves embedding metal contacts between dielectric materials and using heat treatment for solid-state diffusion of copper atoms, thereby eliminating the bridging problem associated with soldering.\n
\n
The advantages of hybrid bonding over flip-chip soldering are obvious. Firstly, it enables ultra-fine pitch and small contact sizes, facilitating high I/O counts. This is critical in modern semiconductor packaging, where devices require a growing number of connections to meet performance demands. Secondly, unlike flip-chip soldering, which often relies on underfill materials, Cu-Cu hybrid bonding eliminates the need for underfill, reducing parasitic capacitance, resistance and inductance, as well as thermal resistance. Lastly, the reduced thickness of the bonded connections in Cu-Cu hybrid bonding, nearly eliminating the 10 to 30 micron thickness of solder balls in flip-chip technology, opens up new possibilities for more compact and efficient semiconductor packages.
"""
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+createdAt: DateTimeImmutable @1694874121 {#1730
date: 2023-09-16 16:22:01.0 +02:00
}
} |
|
Show voter details
|
44 |
DENIED
|
moderate
|
App\Entity\Entry {#1737
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#1734 …}
+slug: "Advancing-Cu-Cu-Hybrid-Bonding-Overcoming-Challenges-for-the-Future-of"
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+url: "https://www.microwavejournal.com/articles/40845-advancing-cu-cu-hybrid-bonding-overcoming-challenges-for-the-future-of-semiconductor-packaging"
+body: """
As solder bump pitches shrink, several issues arise. Reduced bump height and surface area for bonding make it increasingly difficult to establish reliable electrical connections, necessitating precise manufacturing processes to avoid errors. Critical co-planarity and surface roughness become paramount, as even minor irregularities can compromise successful bonding.\n
\n
To overcome these issues, Cu-Cu hybrid bonding technology steps in as a game-changer. This innovative technique involves embedding metal contacts between dielectric materials and using heat treatment for solid-state diffusion of copper atoms, thereby eliminating the bridging problem associated with soldering.\n
\n
The advantages of hybrid bonding over flip-chip soldering are obvious. Firstly, it enables ultra-fine pitch and small contact sizes, facilitating high I/O counts. This is critical in modern semiconductor packaging, where devices require a growing number of connections to meet performance demands. Secondly, unlike flip-chip soldering, which often relies on underfill materials, Cu-Cu hybrid bonding eliminates the need for underfill, reducing parasitic capacitance, resistance and inductance, as well as thermal resistance. Lastly, the reduced thickness of the bonded connections in Cu-Cu hybrid bonding, nearly eliminating the 10 to 30 micron thickness of solder balls in flip-chip technology, opens up new possibilities for more compact and efficient semiconductor packages.
"""
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date: 2023-09-16 16:22:01.0 +02:00
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} |
|
Show voter details
|
45 |
DENIED
|
ROLE_USER
|
null |
|
Show voter details
|
46 |
DENIED
|
moderate
|
App\Entity\Entry {#1626
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#1554 …}
+slug: "Jumping-Over-Thermal-Cycles-Accelerates-Thermomechanical-Fatigue-Simulations"
+title: "Jumping Over Thermal Cycles Accelerates Thermomechanical Fatigue Simulations"
+url: "https://semiengineering.com/jumping-over-thermal-cycles-accelerates-thermomechanical-fatigue-simulations/"
+body: """
Although you are probably not aware of them, dozens of electronic control units (ECUs) — printed circuit boards (PCBs) in metal or plastic housings — exist in your car to control and monitor the operation and safety of your vehicle’s many control systems. These units must work for the lifetime of your car, during which time they are subjected to many heating and cooling cycles. The most obvious cycle occurs when you start your car after it has cooled at night. It heats up as the car runs and then cools again when you shut it off. That’s one “ambient” temperature cycle.\n
\n
Additional so called “active” thermal cycles can occur locally within specific electronic components on the PCB. For instance, a MOSFET transistor draws a lot of current and heats up the PCB near its location, causing additional thermal cycling. These complex temperature distributions can cause local thermomechanical strain because differences in temperature across the PCB result in differential expansion of the board. Because the board is constrained by its housing, this can lead to bending of the board, putting additional strain on the solder joints that connect the components to the board.\n
\n
The widely used power law based approach — simulation of only few cycles and prognosis of solder joints lifetime — has many shortcomings, where no absolute lifetime prediction or the damage driven load relocation and its nonlinear evolution are captured. Youssef Maniar and Marta Kuczynska, engineers at Robert Bosch GmbH in Germany, have developed an accurate nonlinear damage model able to predict absolute lifetime of solder connections. The problem they faced, absolute lifetime prediction, involves simulation of all cycles imposed to the components, and the computational effort is therefore extensive. Then, about two years ago, they read an academic paper that described a way to “jump” over some cycles to accelerate simulation.\n
\n
The mathematics behind the ability to jump over a large number of simulated thermomechanical cycles to dramatically accelerate the simulation time without sacrificing accuracy is involved, but the software essentially looks at the slope or “gradient” of certain solution variables (e.g., stress) versus time plot on the fly to determine when it can skip over the next n number of cycles. The maximum value of n must be defined by the simulation engineer before the run. The simulation engineer also inputs other parameters beforehand to impose limits on the software to optimize the run.
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Show voter details
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DENIED
|
edit
|
App\Entity\Entry {#1626
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#1554 …}
+slug: "Jumping-Over-Thermal-Cycles-Accelerates-Thermomechanical-Fatigue-Simulations"
+title: "Jumping Over Thermal Cycles Accelerates Thermomechanical Fatigue Simulations"
+url: "https://semiengineering.com/jumping-over-thermal-cycles-accelerates-thermomechanical-fatigue-simulations/"
+body: """
Although you are probably not aware of them, dozens of electronic control units (ECUs) — printed circuit boards (PCBs) in metal or plastic housings — exist in your car to control and monitor the operation and safety of your vehicle’s many control systems. These units must work for the lifetime of your car, during which time they are subjected to many heating and cooling cycles. The most obvious cycle occurs when you start your car after it has cooled at night. It heats up as the car runs and then cools again when you shut it off. That’s one “ambient” temperature cycle.\n
\n
Additional so called “active” thermal cycles can occur locally within specific electronic components on the PCB. For instance, a MOSFET transistor draws a lot of current and heats up the PCB near its location, causing additional thermal cycling. These complex temperature distributions can cause local thermomechanical strain because differences in temperature across the PCB result in differential expansion of the board. Because the board is constrained by its housing, this can lead to bending of the board, putting additional strain on the solder joints that connect the components to the board.\n
\n
The widely used power law based approach — simulation of only few cycles and prognosis of solder joints lifetime — has many shortcomings, where no absolute lifetime prediction or the damage driven load relocation and its nonlinear evolution are captured. Youssef Maniar and Marta Kuczynska, engineers at Robert Bosch GmbH in Germany, have developed an accurate nonlinear damage model able to predict absolute lifetime of solder connections. The problem they faced, absolute lifetime prediction, involves simulation of all cycles imposed to the components, and the computational effort is therefore extensive. Then, about two years ago, they read an academic paper that described a way to “jump” over some cycles to accelerate simulation.\n
\n
The mathematics behind the ability to jump over a large number of simulated thermomechanical cycles to dramatically accelerate the simulation time without sacrificing accuracy is involved, but the software essentially looks at the slope or “gradient” of certain solution variables (e.g., stress) versus time plot on the fly to determine when it can skip over the next n number of cycles. The maximum value of n must be defined by the simulation engineer before the run. The simulation engineer also inputs other parameters beforehand to impose limits on the software to optimize the run.
"""
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date: 2023-09-15 21:57:22.0 +02:00
}
} |
|
Show voter details
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48 |
DENIED
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moderate
|
App\Entity\Entry {#1626
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#1554 …}
+slug: "Jumping-Over-Thermal-Cycles-Accelerates-Thermomechanical-Fatigue-Simulations"
+title: "Jumping Over Thermal Cycles Accelerates Thermomechanical Fatigue Simulations"
+url: "https://semiengineering.com/jumping-over-thermal-cycles-accelerates-thermomechanical-fatigue-simulations/"
+body: """
Although you are probably not aware of them, dozens of electronic control units (ECUs) — printed circuit boards (PCBs) in metal or plastic housings — exist in your car to control and monitor the operation and safety of your vehicle’s many control systems. These units must work for the lifetime of your car, during which time they are subjected to many heating and cooling cycles. The most obvious cycle occurs when you start your car after it has cooled at night. It heats up as the car runs and then cools again when you shut it off. That’s one “ambient” temperature cycle.\n
\n
Additional so called “active” thermal cycles can occur locally within specific electronic components on the PCB. For instance, a MOSFET transistor draws a lot of current and heats up the PCB near its location, causing additional thermal cycling. These complex temperature distributions can cause local thermomechanical strain because differences in temperature across the PCB result in differential expansion of the board. Because the board is constrained by its housing, this can lead to bending of the board, putting additional strain on the solder joints that connect the components to the board.\n
\n
The widely used power law based approach — simulation of only few cycles and prognosis of solder joints lifetime — has many shortcomings, where no absolute lifetime prediction or the damage driven load relocation and its nonlinear evolution are captured. Youssef Maniar and Marta Kuczynska, engineers at Robert Bosch GmbH in Germany, have developed an accurate nonlinear damage model able to predict absolute lifetime of solder connections. The problem they faced, absolute lifetime prediction, involves simulation of all cycles imposed to the components, and the computational effort is therefore extensive. Then, about two years ago, they read an academic paper that described a way to “jump” over some cycles to accelerate simulation.\n
\n
The mathematics behind the ability to jump over a large number of simulated thermomechanical cycles to dramatically accelerate the simulation time without sacrificing accuracy is involved, but the software essentially looks at the slope or “gradient” of certain solution variables (e.g., stress) versus time plot on the fly to determine when it can skip over the next n number of cycles. The maximum value of n must be defined by the simulation engineer before the run. The simulation engineer also inputs other parameters beforehand to impose limits on the software to optimize the run.
"""
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date: 2023-09-15 21:57:22.0 +02:00
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} |
|
Show voter details
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49 |
DENIED
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ROLE_USER
|
null |
|
Show voter details
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50 |
DENIED
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moderate
|
App\Entity\Entry {#1687
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#1554 …}
+slug: "Test-Strategies-In-The-Era-Of-Heterogeneous-Integration"
+title: "Test Strategies In The Era Of Heterogeneous Integration"
+url: "https://semiengineering.com/test-strategies-in-the-era-of-heterogeneous-integration/"
+body: """
cross-posted from: [discuss.tchncs.de/post/3157319](https://discuss.tchncs.de/post/3157319)\n
\n
> Compared with traditional monolithic devices, the design and manufacturing process for chiplets is significantly different. The scrap costs associated with manufacturing traditional monolithic semiconductor devices is basically linear, including single chip cost, packaging, and assembly costs.\n
> \n
> Manufacturing processes for 2.5D/3D designs differ significantly in terms of the accumulation of scrap costs. Specifically, these costs increase geometrically from fabrication to assembly driven by scrap costs for multiple dies, multi-chip partial assemblies, and/or full 2.5D/3D packages.\n
> \n
> Shifting tests, either left or right, in the test process is a strategy to achieve these goals and minimize the overall manufacturing cost of 2.5D/3D components. Shift left is the ability to increase test coverage earlier in the manufacturing process (e.g., during wafer inspection and partial packaging) to maximize KGD, while reducing future packaging costs. Additional tests can also be added to the process to identify new failure types or failure modes.\n
> \n
> However, the benefits of shift left need to be weighed. For example, increasing test intensity early in the manufacturing process can positively impact known good devices but it can also lead to an increase in test costs that is not sufficiently offset by the optimizations, even after accounting for the resulting reduction in scrap costs.\n
> \n
> Shift right means increasing test coverage later in the manufacturing process, expanding the ability to detect defects, and maintaining quality levels with the goal of reducing costs with higher parallelism testing.\n
> \n
> Typically, a test item with a higher yield on wafer or mission pattern tests, or a high yield test that requires a longer scan test time is an ideal candidate for shifting right. These tests can be moved to final or system level test, or flexibly managed in between.\n
> \n
> The goal of shifting tests to the left or right is to achieve the optimal combination of quality and yield throughout the entire manufacturing process, ultimately optimizing the overall cost of quality.
"""
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date: 2023-09-12 20:21:44.0 +02:00
}
} |
|
Show voter details
|
51 |
DENIED
|
edit
|
App\Entity\Entry {#1687
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#1554 …}
+slug: "Test-Strategies-In-The-Era-Of-Heterogeneous-Integration"
+title: "Test Strategies In The Era Of Heterogeneous Integration"
+url: "https://semiengineering.com/test-strategies-in-the-era-of-heterogeneous-integration/"
+body: """
cross-posted from: [discuss.tchncs.de/post/3157319](https://discuss.tchncs.de/post/3157319)\n
\n
> Compared with traditional monolithic devices, the design and manufacturing process for chiplets is significantly different. The scrap costs associated with manufacturing traditional monolithic semiconductor devices is basically linear, including single chip cost, packaging, and assembly costs.\n
> \n
> Manufacturing processes for 2.5D/3D designs differ significantly in terms of the accumulation of scrap costs. Specifically, these costs increase geometrically from fabrication to assembly driven by scrap costs for multiple dies, multi-chip partial assemblies, and/or full 2.5D/3D packages.\n
> \n
> Shifting tests, either left or right, in the test process is a strategy to achieve these goals and minimize the overall manufacturing cost of 2.5D/3D components. Shift left is the ability to increase test coverage earlier in the manufacturing process (e.g., during wafer inspection and partial packaging) to maximize KGD, while reducing future packaging costs. Additional tests can also be added to the process to identify new failure types or failure modes.\n
> \n
> However, the benefits of shift left need to be weighed. For example, increasing test intensity early in the manufacturing process can positively impact known good devices but it can also lead to an increase in test costs that is not sufficiently offset by the optimizations, even after accounting for the resulting reduction in scrap costs.\n
> \n
> Shift right means increasing test coverage later in the manufacturing process, expanding the ability to detect defects, and maintaining quality levels with the goal of reducing costs with higher parallelism testing.\n
> \n
> Typically, a test item with a higher yield on wafer or mission pattern tests, or a high yield test that requires a longer scan test time is an ideal candidate for shifting right. These tests can be moved to final or system level test, or flexibly managed in between.\n
> \n
> The goal of shifting tests to the left or right is to achieve the optimal combination of quality and yield throughout the entire manufacturing process, ultimately optimizing the overall cost of quality.
"""
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Show voter details
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|
App\Entity\Entry {#1687
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+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#1554 …}
+slug: "Test-Strategies-In-The-Era-Of-Heterogeneous-Integration"
+title: "Test Strategies In The Era Of Heterogeneous Integration"
+url: "https://semiengineering.com/test-strategies-in-the-era-of-heterogeneous-integration/"
+body: """
cross-posted from: [discuss.tchncs.de/post/3157319](https://discuss.tchncs.de/post/3157319)\n
\n
> Compared with traditional monolithic devices, the design and manufacturing process for chiplets is significantly different. The scrap costs associated with manufacturing traditional monolithic semiconductor devices is basically linear, including single chip cost, packaging, and assembly costs.\n
> \n
> Manufacturing processes for 2.5D/3D designs differ significantly in terms of the accumulation of scrap costs. Specifically, these costs increase geometrically from fabrication to assembly driven by scrap costs for multiple dies, multi-chip partial assemblies, and/or full 2.5D/3D packages.\n
> \n
> Shifting tests, either left or right, in the test process is a strategy to achieve these goals and minimize the overall manufacturing cost of 2.5D/3D components. Shift left is the ability to increase test coverage earlier in the manufacturing process (e.g., during wafer inspection and partial packaging) to maximize KGD, while reducing future packaging costs. Additional tests can also be added to the process to identify new failure types or failure modes.\n
> \n
> However, the benefits of shift left need to be weighed. For example, increasing test intensity early in the manufacturing process can positively impact known good devices but it can also lead to an increase in test costs that is not sufficiently offset by the optimizations, even after accounting for the resulting reduction in scrap costs.\n
> \n
> Shift right means increasing test coverage later in the manufacturing process, expanding the ability to detect defects, and maintaining quality levels with the goal of reducing costs with higher parallelism testing.\n
> \n
> Typically, a test item with a higher yield on wafer or mission pattern tests, or a high yield test that requires a longer scan test time is an ideal candidate for shifting right. These tests can be moved to final or system level test, or flexibly managed in between.\n
> \n
> The goal of shifting tests to the left or right is to achieve the optimal combination of quality and yield throughout the entire manufacturing process, ultimately optimizing the overall cost of quality.
"""
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53 |
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54 |
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moderate
|
App\Entity\Entry {#1562
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#1554 …}
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+title: "Use Cases And Value Proposition Of eFPGA (Embedded FPGA)"
+url: "https://semiengineering.com/use-cases-and-value-proposition-of-efpga/"
+body: """
cross-posted from: [discuss.tchncs.de/post/3011500](https://discuss.tchncs.de/post/3011500)\n
\n
> Many volume applications use FPGA because they need in-field reconfigurability (changing standards, changing algorithms, etc) but they want to improve their system’s competitiveness (power, size, cost). FPGAs are bulky, expensive and power hungry. Integrating eFPGA can greatly improve the economics while maintaining full reconfigurability and performance.\n
> \n
> We’ve found with customers that a significant portion of the LUTs in their designs don’t change with reconfigurations: they are fixed buses to bring data to and from the reconfigurable core. This can be hardwired so the number of LUTs needed in the SoC is typically half of what’s in the FPGA. There is also a lot of cost of voltage regulators for an FPGA that disappear with integration.\n
> \n
> Typically, the cost of eFPGA is 1/10th the cost of the FPGA it replaces but with the same speed and programmability. Power can also be cut to 1/10th because most of the power in an FPGA is the power-hungry PHYs that are mostly not needed when using eFPGA in the SoC.
"""
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Show voter details
|
55 |
DENIED
|
edit
|
App\Entity\Entry {#1562
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#1554 …}
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+body: """
cross-posted from: [discuss.tchncs.de/post/3011500](https://discuss.tchncs.de/post/3011500)\n
\n
> Many volume applications use FPGA because they need in-field reconfigurability (changing standards, changing algorithms, etc) but they want to improve their system’s competitiveness (power, size, cost). FPGAs are bulky, expensive and power hungry. Integrating eFPGA can greatly improve the economics while maintaining full reconfigurability and performance.\n
> \n
> We’ve found with customers that a significant portion of the LUTs in their designs don’t change with reconfigurations: they are fixed buses to bring data to and from the reconfigurable core. This can be hardwired so the number of LUTs needed in the SoC is typically half of what’s in the FPGA. There is also a lot of cost of voltage regulators for an FPGA that disappear with integration.\n
> \n
> Typically, the cost of eFPGA is 1/10th the cost of the FPGA it replaces but with the same speed and programmability. Power can also be cut to 1/10th because most of the power in an FPGA is the power-hungry PHYs that are mostly not needed when using eFPGA in the SoC.
"""
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} |
|
Show voter details
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56 |
DENIED
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moderate
|
App\Entity\Entry {#1562
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#1554 …}
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cross-posted from: [discuss.tchncs.de/post/3011500](https://discuss.tchncs.de/post/3011500)\n
\n
> Many volume applications use FPGA because they need in-field reconfigurability (changing standards, changing algorithms, etc) but they want to improve their system’s competitiveness (power, size, cost). FPGAs are bulky, expensive and power hungry. Integrating eFPGA can greatly improve the economics while maintaining full reconfigurability and performance.\n
> \n
> We’ve found with customers that a significant portion of the LUTs in their designs don’t change with reconfigurations: they are fixed buses to bring data to and from the reconfigurable core. This can be hardwired so the number of LUTs needed in the SoC is typically half of what’s in the FPGA. There is also a lot of cost of voltage regulators for an FPGA that disappear with integration.\n
> \n
> Typically, the cost of eFPGA is 1/10th the cost of the FPGA it replaces but with the same speed and programmability. Power can also be cut to 1/10th because most of the power in an FPGA is the power-hungry PHYs that are mostly not needed when using eFPGA in the SoC.
"""
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} |
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Show voter details
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58 |
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moderate
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App\Entity\Entry {#1433
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
+image: Proxies\__CG__\App\Entity\Image {#1640 …}
+domain: Proxies\__CG__\App\Entity\Domain {#1655 …}
+slug: "Great-Introduction-to-Formal-Verification-Formal-Verification-An-Essential-Toolkit"
+title: "Great Introduction to Formal Verification : "Formal Verification An Essential Toolkit For Modern VLSI Design""
+url: "https://discuss.tchncs.de/pictrs/image/7cc96632-b30d-4521-95f9-e8448fc1f671.jpeg"
+body: """
cross-posted from: [discuss.tchncs.de/post/2357238](https://discuss.tchncs.de/post/2357238)\n
\n
> > Are you an engineer working on designing complex modern chips or System On Chips (SOCs) at the Register Transfer Level (RTL)? Have you ever been in one of the following frustrating situations?\n
> \n
> > •Your RTL designs suffered a major (and expensive) bug escape due to insufficient coverage of corner cases during simulation testing.\n
> \n
> > • You created a new RTL module and want to see its real flows in simulation, but realize this will take another few weeks of testbench development work.\n
> \n
> > • You tweaked a piece of RTL to aid synthesis or timing and need to spend weeks simulating to make sure you did not actually change its functionality.\n
> \n
> > • You are in the late stages of validating a design, and the continuing stream of new bugs makes it clear that your randomized simulations are just not providing proper coverage.\n
> \n
> > • You modified the control register specification for your design and need to spend lots of time simulating to make sure your changes to the RTL correctly implement these registers.\n
> \n
> > If so, congratulations: you have picked up the right book! Each of these situations can be addressed using formal verification (FV) to significantly increase both your overall productivity and your confidence in your results. You will achieve this by using formal mathematical tools to create orders-of-magnitude increases in efficiency and productivity, as well as introducing mathematical near-certainty into areas previously dependent on informal testing.\n
> \n
> Design verification has always been essential to chip design. However as chip complexity increased over years, state-space and required verification effort exponentially exploded. With emerging powerful and commercially accessible tools, formal verification has become more viable and even unavoidable for reliable sign-off and catching bugs early in the process. I found this book a very helpful introduction to formal verification. It explains how formal can be utilized, different methods like formal property verification (FPV) and sequential equivalence checks (SEC) and where they are useful, limitations, complexity problems and how to mitigate the issues that come with formal. It explains how formal and functional can complement each other for combined sigh-off. It explains theoretical concepts with clear examples and diagrams. It explains formal algorithms as well for anyone interested, but focus is more about how to utilize formal in your projects. And if you are a total beginner, do not worry, there is section which explains essentials of Systemverilog Assertions (SVA), which you can completely skip if you know about it already.
"""
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edit
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App\Entity\Entry {#1433
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+title: "Great Introduction to Formal Verification : "Formal Verification An Essential Toolkit For Modern VLSI Design""
+url: "https://discuss.tchncs.de/pictrs/image/7cc96632-b30d-4521-95f9-e8448fc1f671.jpeg"
+body: """
cross-posted from: [discuss.tchncs.de/post/2357238](https://discuss.tchncs.de/post/2357238)\n
\n
> > Are you an engineer working on designing complex modern chips or System On Chips (SOCs) at the Register Transfer Level (RTL)? Have you ever been in one of the following frustrating situations?\n
> \n
> > •Your RTL designs suffered a major (and expensive) bug escape due to insufficient coverage of corner cases during simulation testing.\n
> \n
> > • You created a new RTL module and want to see its real flows in simulation, but realize this will take another few weeks of testbench development work.\n
> \n
> > • You tweaked a piece of RTL to aid synthesis or timing and need to spend weeks simulating to make sure you did not actually change its functionality.\n
> \n
> > • You are in the late stages of validating a design, and the continuing stream of new bugs makes it clear that your randomized simulations are just not providing proper coverage.\n
> \n
> > • You modified the control register specification for your design and need to spend lots of time simulating to make sure your changes to the RTL correctly implement these registers.\n
> \n
> > If so, congratulations: you have picked up the right book! Each of these situations can be addressed using formal verification (FV) to significantly increase both your overall productivity and your confidence in your results. You will achieve this by using formal mathematical tools to create orders-of-magnitude increases in efficiency and productivity, as well as introducing mathematical near-certainty into areas previously dependent on informal testing.\n
> \n
> Design verification has always been essential to chip design. However as chip complexity increased over years, state-space and required verification effort exponentially exploded. With emerging powerful and commercially accessible tools, formal verification has become more viable and even unavoidable for reliable sign-off and catching bugs early in the process. I found this book a very helpful introduction to formal verification. It explains how formal can be utilized, different methods like formal property verification (FPV) and sequential equivalence checks (SEC) and where they are useful, limitations, complexity problems and how to mitigate the issues that come with formal. It explains how formal and functional can complement each other for combined sigh-off. It explains theoretical concepts with clear examples and diagrams. It explains formal algorithms as well for anyone interested, but focus is more about how to utilize formal in your projects. And if you are a total beginner, do not worry, there is section which explains essentials of Systemverilog Assertions (SVA), which you can completely skip if you know about it already.
"""
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|
Show voter details
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moderate
|
App\Entity\Entry {#1433
+user: App\Entity\User {#264 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1654 …}
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+body: """
cross-posted from: [discuss.tchncs.de/post/2357238](https://discuss.tchncs.de/post/2357238)\n
\n
> > Are you an engineer working on designing complex modern chips or System On Chips (SOCs) at the Register Transfer Level (RTL)? Have you ever been in one of the following frustrating situations?\n
> \n
> > •Your RTL designs suffered a major (and expensive) bug escape due to insufficient coverage of corner cases during simulation testing.\n
> \n
> > • You created a new RTL module and want to see its real flows in simulation, but realize this will take another few weeks of testbench development work.\n
> \n
> > • You tweaked a piece of RTL to aid synthesis or timing and need to spend weeks simulating to make sure you did not actually change its functionality.\n
> \n
> > • You are in the late stages of validating a design, and the continuing stream of new bugs makes it clear that your randomized simulations are just not providing proper coverage.\n
> \n
> > • You modified the control register specification for your design and need to spend lots of time simulating to make sure your changes to the RTL correctly implement these registers.\n
> \n
> > If so, congratulations: you have picked up the right book! Each of these situations can be addressed using formal verification (FV) to significantly increase both your overall productivity and your confidence in your results. You will achieve this by using formal mathematical tools to create orders-of-magnitude increases in efficiency and productivity, as well as introducing mathematical near-certainty into areas previously dependent on informal testing.\n
> \n
> Design verification has always been essential to chip design. However as chip complexity increased over years, state-space and required verification effort exponentially exploded. With emerging powerful and commercially accessible tools, formal verification has become more viable and even unavoidable for reliable sign-off and catching bugs early in the process. I found this book a very helpful introduction to formal verification. It explains how formal can be utilized, different methods like formal property verification (FPV) and sequential equivalence checks (SEC) and where they are useful, limitations, complexity problems and how to mitigate the issues that come with formal. It explains how formal and functional can complement each other for combined sigh-off. It explains theoretical concepts with clear examples and diagrams. It explains formal algorithms as well for anyone interested, but focus is more about how to utilize formal in your projects. And if you are a total beginner, do not worry, there is section which explains essentials of Systemverilog Assertions (SVA), which you can completely skip if you know about it already.
"""
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App\Entity\EntryComment {#2046
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App\Entity\EntryComment {#2046
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Proxies\__CG__\App\Entity\Entry {#2073
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+slug: "Soldering-Iron-Tips-Stop-Working-Melting-Solder"
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Hey everyone,\n
\n
I’m a complete beginner in the world of soldering, and I’m facing some frustrating issues with my soldering iron tips. After just a few minutes of use, my soldering iron tips can’t melt the solder anymore.\n
\n
I always keep a sponge nearby and make sure to clean the tip frequently, just like I saw in tutorials. However, the tips still look a little “burned”/ black. Am I doing something wrong? Or could it be related to the soldering equipment I’m using? I bought a $20 kit on Amazon just to practice.
"""
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Hey everyone,\n
\n
I’m a complete beginner in the world of soldering, and I’m facing some frustrating issues with my soldering iron tips. After just a few minutes of use, my soldering iron tips can’t melt the solder anymore.\n
\n
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Hey everyone,\n
\n
I’m a complete beginner in the world of soldering, and I’m facing some frustrating issues with my soldering iron tips. After just a few minutes of use, my soldering iron tips can’t melt the solder anymore.\n
\n
I always keep a sponge nearby and make sure to clean the tip frequently, just like I saw in tutorials. However, the tips still look a little “burned”/ black. Am I doing something wrong? Or could it be related to the soldering equipment I’m using? I bought a $20 kit on Amazon just to practice.
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App\Entity\EntryComment {#2137
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Hey everyone,\n
\n
I’m a complete beginner in the world of soldering, and I’m facing some frustrating issues with my soldering iron tips. After just a few minutes of use, my soldering iron tips can’t melt the solder anymore.\n
\n
I always keep a sponge nearby and make sure to clean the tip frequently, just like I saw in tutorials. However, the tips still look a little “burned”/ black. Am I doing something wrong? Or could it be related to the soldering equipment I’m using? I bought a $20 kit on Amazon just to practice.
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71 |
DENIED
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App\Entity\EntryComment {#2137
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Hey everyone,\n
\n
I’m a complete beginner in the world of soldering, and I’m facing some frustrating issues with my soldering iron tips. After just a few minutes of use, my soldering iron tips can’t melt the solder anymore.\n
\n
I always keep a sponge nearby and make sure to clean the tip frequently, just like I saw in tutorials. However, the tips still look a little “burned”/ black. Am I doing something wrong? Or could it be related to the soldering equipment I’m using? I bought a $20 kit on Amazon just to practice.
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Show voter details
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72 |
DENIED
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App\Entity\EntryComment {#2137
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Hey everyone,\n
\n
I’m a complete beginner in the world of soldering, and I’m facing some frustrating issues with my soldering iron tips. After just a few minutes of use, my soldering iron tips can’t melt the solder anymore.\n
\n
I always keep a sponge nearby and make sure to clean the tip frequently, just like I saw in tutorials. However, the tips still look a little “burned”/ black. Am I doing something wrong? Or could it be related to the soldering equipment I’m using? I bought a $20 kit on Amazon just to practice.
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+createdAt: DateTimeImmutable @1690381128 {#2136
date: 2023-07-26 16:18:48.0 +02:00
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} |
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Show voter details
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73 |
DENIED
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ROLE_USER
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null |
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Show voter details
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74 |
DENIED
|
moderate
|
Proxies\__CG__\App\Entity\Entry {#2300
+user: Proxies\__CG__\App\Entity\User {#2257 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2521 …}
+slug: "Strange-board-behavior-when-switching-power-supplies"
+title: "Strange board behavior when switching power supplies"
+url: "https://photos.app.goo.gl/MCx7Q4BDbKTv68EJ8"
+body: """
This photo shows the power conversion side of two versions of the same board. Input is up to 60V DC, board converts to 5V and then down to 3.3V.\n
\n
The top board works correctly all the time. But the bottom board has strange issues. Everything works perfectly when I connect it to my bench power supply at 53V. The board powers up with no problems. When I connect it to the daisy chain of other boards, it suddenly will no longer power on, despite ~54V being passed through correctly to downstream boards.\n
\n
This is a real head-scratcher for me, and I’m having trouble making sense of it. I’m not so much looking for The Solution as to what steps I should take to troubleshoot this. There were some issues attaching the image, so in case it doesn’t show up.\n
\n
[photos.app.goo.gl/MCx7Q4BDbKTv68EJ8](https://photos.app.goo.gl/MCx7Q4BDbKTv68EJ8)
"""
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+body: "You can try checking whether the 54v supply has any voltage spikes if you haven’t already. 60-to-5 converter is most likely a switching converter and they draw high current instantaneously and can cause spikes if not filtered properly which may affect the functionality. This may not show up in DC voltage measurement, and daisy chained boards may still function if they are filtered well. One of the daisy-chained boards may be causing the disturbance too, and maybe top board is filtered well but bottom isn’t for some reason, maybe a soldering error(e.g. filter capscitor ground connection, poor soldering may be conductive but with high inductance, hindering filter functionality). So it is good to check supply quality. Also what do you mean by not powering up? Is 3.3v not working? What about 5v?"
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Show voter details
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75 |
DENIED
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edit
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Proxies\__CG__\App\Entity\Entry {#2300
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+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2521 …}
+slug: "Strange-board-behavior-when-switching-power-supplies"
+title: "Strange board behavior when switching power supplies"
+url: "https://photos.app.goo.gl/MCx7Q4BDbKTv68EJ8"
+body: """
This photo shows the power conversion side of two versions of the same board. Input is up to 60V DC, board converts to 5V and then down to 3.3V.\n
\n
The top board works correctly all the time. But the bottom board has strange issues. Everything works perfectly when I connect it to my bench power supply at 53V. The board powers up with no problems. When I connect it to the daisy chain of other boards, it suddenly will no longer power on, despite ~54V being passed through correctly to downstream boards.\n
\n
This is a real head-scratcher for me, and I’m having trouble making sense of it. I’m not so much looking for The Solution as to what steps I should take to troubleshoot this. There were some issues attaching the image, so in case it doesn’t show up.\n
\n
[photos.app.goo.gl/MCx7Q4BDbKTv68EJ8](https://photos.app.goo.gl/MCx7Q4BDbKTv68EJ8)
"""
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+body: "You can try checking whether the 54v supply has any voltage spikes if you haven’t already. 60-to-5 converter is most likely a switching converter and they draw high current instantaneously and can cause spikes if not filtered properly which may affect the functionality. This may not show up in DC voltage measurement, and daisy chained boards may still function if they are filtered well. One of the daisy-chained boards may be causing the disturbance too, and maybe top board is filtered well but bottom isn’t for some reason, maybe a soldering error(e.g. filter capscitor ground connection, poor soldering may be conductive but with high inductance, hindering filter functionality). So it is good to check supply quality. Also what do you mean by not powering up? Is 3.3v not working? What about 5v?"
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…2
} |
|
Show voter details
|
76 |
DENIED
|
moderate
|
Proxies\__CG__\App\Entity\Entry {#2300
+user: Proxies\__CG__\App\Entity\User {#2257 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2521 …}
+slug: "Strange-board-behavior-when-switching-power-supplies"
+title: "Strange board behavior when switching power supplies"
+url: "https://photos.app.goo.gl/MCx7Q4BDbKTv68EJ8"
+body: """
This photo shows the power conversion side of two versions of the same board. Input is up to 60V DC, board converts to 5V and then down to 3.3V.\n
\n
The top board works correctly all the time. But the bottom board has strange issues. Everything works perfectly when I connect it to my bench power supply at 53V. The board powers up with no problems. When I connect it to the daisy chain of other boards, it suddenly will no longer power on, despite ~54V being passed through correctly to downstream boards.\n
\n
This is a real head-scratcher for me, and I’m having trouble making sense of it. I’m not so much looking for The Solution as to what steps I should take to troubleshoot this. There were some issues attaching the image, so in case it doesn’t show up.\n
\n
[photos.app.goo.gl/MCx7Q4BDbKTv68EJ8](https://photos.app.goo.gl/MCx7Q4BDbKTv68EJ8)
"""
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+body: "You can try checking whether the 54v supply has any voltage spikes if you haven’t already. 60-to-5 converter is most likely a switching converter and they draw high current instantaneously and can cause spikes if not filtered properly which may affect the functionality. This may not show up in DC voltage measurement, and daisy chained boards may still function if they are filtered well. One of the daisy-chained boards may be causing the disturbance too, and maybe top board is filtered well but bottom isn’t for some reason, maybe a soldering error(e.g. filter capscitor ground connection, poor soldering may be conductive but with high inductance, hindering filter functionality). So it is good to check supply quality. Also what do you mean by not powering up? Is 3.3v not working? What about 5v?"
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+__isInitialized__: true
…2
} |
|
Show voter details
|
77 |
DENIED
|
ROLE_USER
|
null |
|
Show voter details
|
78 |
DENIED
|
moderate
|
App\Entity\EntryComment {#2324
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2300
+user: Proxies\__CG__\App\Entity\User {#2257 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
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+domain: Proxies\__CG__\App\Entity\Domain {#2521 …}
+slug: "Strange-board-behavior-when-switching-power-supplies"
+title: "Strange board behavior when switching power supplies"
+url: "https://photos.app.goo.gl/MCx7Q4BDbKTv68EJ8"
+body: """
This photo shows the power conversion side of two versions of the same board. Input is up to 60V DC, board converts to 5V and then down to 3.3V.\n
\n
The top board works correctly all the time. But the bottom board has strange issues. Everything works perfectly when I connect it to my bench power supply at 53V. The board powers up with no problems. When I connect it to the daisy chain of other boards, it suddenly will no longer power on, despite ~54V being passed through correctly to downstream boards.\n
\n
This is a real head-scratcher for me, and I’m having trouble making sense of it. I’m not so much looking for The Solution as to what steps I should take to troubleshoot this. There were some issues attaching the image, so in case it doesn’t show up.\n
\n
[photos.app.goo.gl/MCx7Q4BDbKTv68EJ8](https://photos.app.goo.gl/MCx7Q4BDbKTv68EJ8)
"""
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Show voter details
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79 |
DENIED
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edit
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App\Entity\EntryComment {#2324
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This photo shows the power conversion side of two versions of the same board. Input is up to 60V DC, board converts to 5V and then down to 3.3V.\n
\n
The top board works correctly all the time. But the bottom board has strange issues. Everything works perfectly when I connect it to my bench power supply at 53V. The board powers up with no problems. When I connect it to the daisy chain of other boards, it suddenly will no longer power on, despite ~54V being passed through correctly to downstream boards.\n
\n
This is a real head-scratcher for me, and I’m having trouble making sense of it. I’m not so much looking for The Solution as to what steps I should take to troubleshoot this. There were some issues attaching the image, so in case it doesn’t show up.\n
\n
[photos.app.goo.gl/MCx7Q4BDbKTv68EJ8](https://photos.app.goo.gl/MCx7Q4BDbKTv68EJ8)
"""
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} |
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Show voter details
|
80 |
DENIED
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moderate
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App\Entity\EntryComment {#2324
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This photo shows the power conversion side of two versions of the same board. Input is up to 60V DC, board converts to 5V and then down to 3.3V.\n
\n
The top board works correctly all the time. But the bottom board has strange issues. Everything works perfectly when I connect it to my bench power supply at 53V. The board powers up with no problems. When I connect it to the daisy chain of other boards, it suddenly will no longer power on, despite ~54V being passed through correctly to downstream boards.\n
\n
This is a real head-scratcher for me, and I’m having trouble making sense of it. I’m not so much looking for The Solution as to what steps I should take to troubleshoot this. There were some issues attaching the image, so in case it doesn’t show up.\n
\n
[photos.app.goo.gl/MCx7Q4BDbKTv68EJ8](https://photos.app.goo.gl/MCx7Q4BDbKTv68EJ8)
"""
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Show voter details
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81 |
DENIED
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ROLE_USER
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null |
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Show voter details
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82 |
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moderate
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Proxies\__CG__\App\Entity\Entry {#2344
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83 |
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Show voter details
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84 |
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85 |
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86 |
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87 |
DENIED
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edit
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App\Entity\EntryComment {#2332
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Show voter details
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88 |
DENIED
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App\Entity\EntryComment {#2332
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Show voter details
|
89 |
DENIED
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ROLE_USER
|
null |
|
Show voter details
|
90 |
DENIED
|
moderate
|
Proxies\__CG__\App\Entity\Entry {#2140
+user: Proxies\__CG__\App\Entity\User {#2248 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2495 …}
+slug: "Help-Bypassing-Timer-on-LED-Lights"
+title: "Help Bypassing Timer on LED Lights"
+url: null
+body: """
Hi all! I recently purchased some push-lights for my kitchen from my hardware store, and I stupidly didn’t read the package that said that they shut off after 30 mins. This is super inconvenient in my dark kitchen, and I can’t return them. I figured I might as well tinker with them, and any help would be greatly appreciated. The first picture is the small, round push-light (it was in a 3 pack, so I’ve got room for error with these), and the second picture was the even bigger disappointment because it’s a larger strip light.\n
\n
I found them online for reference [here](https://www.amazon.com/dp/B082XWVHS2/ref=emc_b_5_t?th=1) and [here](https://www.amazon.com/Fulcrum-20-LED-Wireless-Anywhere-Rectangular/dp/B00VSKK0V0/ref=asc_df_B00VSKK0V0/?tag=hyprod-20&linkCode=df0&hvadid=167144278306&hvpos=&hvnetw=g&hvrand=4849414619089547294&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004342&hvtargid=pla-274917460229&psc=1). It doesn’t say they shut off in the description of these, but it says it in the user manual under “product guides and documents” for the rectangle light.\n
\n
TL;DR: Help me bypass the “power saving” mode that shuts these off after 30 mins please!\n
\n

"""
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+body: "Can you read what u1 and q1 are in the first image? Q1 looks like a transistor switch and u1 might be a counter. It may be counting a clock or it might be a comparator checking whether a capacitor is charged or discharged to check time. Is there any components on the other side of the board? I would expect a capacitor or oscillator at least for timing."
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date: 2023-06-24 08:04:31.0 +02:00
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date: 2023-06-24 07:39:45.0 +02:00
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+__isInitialized__: true
…2
} |
|
Show voter details
|
91 |
DENIED
|
edit
|
Proxies\__CG__\App\Entity\Entry {#2140
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+slug: "Help-Bypassing-Timer-on-LED-Lights"
+title: "Help Bypassing Timer on LED Lights"
+url: null
+body: """
Hi all! I recently purchased some push-lights for my kitchen from my hardware store, and I stupidly didn’t read the package that said that they shut off after 30 mins. This is super inconvenient in my dark kitchen, and I can’t return them. I figured I might as well tinker with them, and any help would be greatly appreciated. The first picture is the small, round push-light (it was in a 3 pack, so I’ve got room for error with these), and the second picture was the even bigger disappointment because it’s a larger strip light.\n
\n
I found them online for reference [here](https://www.amazon.com/dp/B082XWVHS2/ref=emc_b_5_t?th=1) and [here](https://www.amazon.com/Fulcrum-20-LED-Wireless-Anywhere-Rectangular/dp/B00VSKK0V0/ref=asc_df_B00VSKK0V0/?tag=hyprod-20&linkCode=df0&hvadid=167144278306&hvpos=&hvnetw=g&hvrand=4849414619089547294&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004342&hvtargid=pla-274917460229&psc=1). It doesn’t say they shut off in the description of these, but it says it in the user manual under “product guides and documents” for the rectangle light.\n
\n
TL;DR: Help me bypass the “power saving” mode that shuts these off after 30 mins please!\n
\n

"""
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Show voter details
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92 |
DENIED
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moderate
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Hi all! I recently purchased some push-lights for my kitchen from my hardware store, and I stupidly didn’t read the package that said that they shut off after 30 mins. This is super inconvenient in my dark kitchen, and I can’t return them. I figured I might as well tinker with them, and any help would be greatly appreciated. The first picture is the small, round push-light (it was in a 3 pack, so I’ve got room for error with these), and the second picture was the even bigger disappointment because it’s a larger strip light.\n
\n
I found them online for reference [here](https://www.amazon.com/dp/B082XWVHS2/ref=emc_b_5_t?th=1) and [here](https://www.amazon.com/Fulcrum-20-LED-Wireless-Anywhere-Rectangular/dp/B00VSKK0V0/ref=asc_df_B00VSKK0V0/?tag=hyprod-20&linkCode=df0&hvadid=167144278306&hvpos=&hvnetw=g&hvrand=4849414619089547294&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004342&hvtargid=pla-274917460229&psc=1). It doesn’t say they shut off in the description of these, but it says it in the user manual under “product guides and documents” for the rectangle light.\n
\n
TL;DR: Help me bypass the “power saving” mode that shuts these off after 30 mins please!\n
\n

"""
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Show voter details
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93 |
DENIED
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ROLE_USER
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Show voter details
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94 |
DENIED
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moderate
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Hi all! I recently purchased some push-lights for my kitchen from my hardware store, and I stupidly didn’t read the package that said that they shut off after 30 mins. This is super inconvenient in my dark kitchen, and I can’t return them. I figured I might as well tinker with them, and any help would be greatly appreciated. The first picture is the small, round push-light (it was in a 3 pack, so I’ve got room for error with these), and the second picture was the even bigger disappointment because it’s a larger strip light.\n
\n
I found them online for reference [here](https://www.amazon.com/dp/B082XWVHS2/ref=emc_b_5_t?th=1) and [here](https://www.amazon.com/Fulcrum-20-LED-Wireless-Anywhere-Rectangular/dp/B00VSKK0V0/ref=asc_df_B00VSKK0V0/?tag=hyprod-20&linkCode=df0&hvadid=167144278306&hvpos=&hvnetw=g&hvrand=4849414619089547294&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004342&hvtargid=pla-274917460229&psc=1). It doesn’t say they shut off in the description of these, but it says it in the user manual under “product guides and documents” for the rectangle light.\n
\n
TL;DR: Help me bypass the “power saving” mode that shuts these off after 30 mins please!\n
\n

"""
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95 |
DENIED
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edit
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App\Entity\EntryComment {#2241
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+slug: "Help-Bypassing-Timer-on-LED-Lights"
+title: "Help Bypassing Timer on LED Lights"
+url: null
+body: """
Hi all! I recently purchased some push-lights for my kitchen from my hardware store, and I stupidly didn’t read the package that said that they shut off after 30 mins. This is super inconvenient in my dark kitchen, and I can’t return them. I figured I might as well tinker with them, and any help would be greatly appreciated. The first picture is the small, round push-light (it was in a 3 pack, so I’ve got room for error with these), and the second picture was the even bigger disappointment because it’s a larger strip light.\n
\n
I found them online for reference [here](https://www.amazon.com/dp/B082XWVHS2/ref=emc_b_5_t?th=1) and [here](https://www.amazon.com/Fulcrum-20-LED-Wireless-Anywhere-Rectangular/dp/B00VSKK0V0/ref=asc_df_B00VSKK0V0/?tag=hyprod-20&linkCode=df0&hvadid=167144278306&hvpos=&hvnetw=g&hvrand=4849414619089547294&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004342&hvtargid=pla-274917460229&psc=1). It doesn’t say they shut off in the description of these, but it says it in the user manual under “product guides and documents” for the rectangle light.\n
\n
TL;DR: Help me bypass the “power saving” mode that shuts these off after 30 mins please!\n
\n

"""
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}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
+root: null
+body: "Can you read what u1 and q1 are in the first image? Q1 looks like a transistor switch and u1 might be a counter. It may be counting a clock or it might be a comparator checking whether a capacitor is charged or discharged to check time. Is there any components on the other side of the board? I would expect a capacitor or oscillator at least for timing."
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"@allmycircuits@discuss.tchncs.de"
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date: 2023-06-24 08:04:31.0 +02:00
}
+createdAt: DateTimeImmutable @1687586625 {#2094
date: 2023-06-24 08:03:45.0 +02:00
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+"title": 4007
} |
|
Show voter details
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DENIED
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moderate
|
App\Entity\EntryComment {#2241
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2140
+user: Proxies\__CG__\App\Entity\User {#2248 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2495 …}
+slug: "Help-Bypassing-Timer-on-LED-Lights"
+title: "Help Bypassing Timer on LED Lights"
+url: null
+body: """
Hi all! I recently purchased some push-lights for my kitchen from my hardware store, and I stupidly didn’t read the package that said that they shut off after 30 mins. This is super inconvenient in my dark kitchen, and I can’t return them. I figured I might as well tinker with them, and any help would be greatly appreciated. The first picture is the small, round push-light (it was in a 3 pack, so I’ve got room for error with these), and the second picture was the even bigger disappointment because it’s a larger strip light.\n
\n
I found them online for reference [here](https://www.amazon.com/dp/B082XWVHS2/ref=emc_b_5_t?th=1) and [here](https://www.amazon.com/Fulcrum-20-LED-Wireless-Anywhere-Rectangular/dp/B00VSKK0V0/ref=asc_df_B00VSKK0V0/?tag=hyprod-20&linkCode=df0&hvadid=167144278306&hvpos=&hvnetw=g&hvrand=4849414619089547294&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004342&hvtargid=pla-274917460229&psc=1). It doesn’t say they shut off in the description of these, but it says it in the user manual under “product guides and documents” for the rectangle light.\n
\n
TL;DR: Help me bypass the “power saving” mode that shuts these off after 30 mins please!\n
\n

"""
+type: "article"
+lang: "en"
+isOc: false
+hasEmbed: false
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date: 2023-06-24 07:39:45.0 +02:00
}
+__isInitialized__: true
…2
}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
+root: null
+body: "Can you read what u1 and q1 are in the first image? Q1 looks like a transistor switch and u1 might be a counter. It may be counting a clock or it might be a comparator checking whether a capacitor is charged or discharged to check time. Is there any components on the other side of the board? I would expect a capacitor or oscillator at least for timing."
+lang: "en"
+isAdult: false
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date: 2023-06-24 17:06:25.0 +02:00
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"@allmycircuits@discuss.tchncs.de"
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+children: Doctrine\ORM\PersistentCollection {#2130 …}
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+reports: Doctrine\ORM\PersistentCollection {#2040 …}
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+editedAt: DateTimeImmutable @1687586671 {#2092
date: 2023-06-24 08:04:31.0 +02:00
}
+createdAt: DateTimeImmutable @1687586625 {#2094
date: 2023-06-24 08:03:45.0 +02:00
}
+"title": 4007
} |
|
Show voter details
|
97 |
DENIED
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ROLE_USER
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null |
|
Show voter details
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98 |
DENIED
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moderate
|
Proxies\__CG__\App\Entity\Entry {#2096
+user: Proxies\__CG__\App\Entity\User {#2558 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2598 …}
+slug: "How-to-setup-this-function-generator-with-this-oscilloscope"
+title: "How to setup this function generator with this oscilloscope?"
+url: "https://imgur.com/a/k6Tx1N9"
+body: """
I’ve got an old oscilloscope and a function generator that I’m trying to use to play around and get more familiar with this kinda stuff. I’m mostly new to electronics (especially analog ones) and I’m having a hard time getting them setup properly.\n
\n
Both devices turn on and the controls seemingly work, but I never get anything more than a flat line or random noise on the scope.\n
\n
Any help would be appreciated!\n
\n
The scope is a Sencore PS148A and the generator is a Heathkit SG-1271.
"""
+type: "link"
+lang: "en"
+isOc: false
+hasEmbed: true
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date: 2023-06-24 17:27:24.0 +02:00
}
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+comments: Doctrine\ORM\PersistentCollection {#2600 …}
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+favourites: Doctrine\ORM\PersistentCollection {#2606 …}
+notifications: Doctrine\ORM\PersistentCollection {#2608 …}
+badges: Doctrine\ORM\PersistentCollection {#2610 …}
+children: [
App\Entity\EntryComment {#2032
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2096 …2}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
+root: null
+body: """
If you are completely new I suggest watching a tutorial. Otherwise some basic tips could be\n
\n
1. if oscilloscope has multiple channels, make sure the channel you connected is the channel nel you see on the screen\n
2. make sure you did the ground connection. You need to connect both signal and ground tips if the probe\n
3. make sure voltage range is fine. If you use a large range in the screen, little amplitude you got may seem like a flat line.\n
4. calibrate your probe, if oscilloscope has that option. But an uncalibrated probe doesn’t explain flat line, it would explain distorted square wave, for example.\n
5. Use another probe. They can get broken. If it is broken all you will see will be the noise the cable pics up like an antenna.\n
6. separate the issue. Connect probe ends to a battery with k own voltage and see what you receive. If it doesn’t work, you know either probe or oscilloscope is wrong.\n
\n
List can get longer really, but I think a tutorial and these can go a long way for the beginning.
"""
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date: 2023-06-23 22:01:02.0 +02:00
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"@mkstowe@discuss.tchncs.de"
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+children: Doctrine\ORM\PersistentCollection {#2077 …}
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+reports: Doctrine\ORM\PersistentCollection {#2088 …}
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date: 2023-06-23 21:32:54.0 +02:00
}
+__isInitialized__: true
…2
} |
|
Show voter details
|
99 |
DENIED
|
edit
|
Proxies\__CG__\App\Entity\Entry {#2096
+user: Proxies\__CG__\App\Entity\User {#2558 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2598 …}
+slug: "How-to-setup-this-function-generator-with-this-oscilloscope"
+title: "How to setup this function generator with this oscilloscope?"
+url: "https://imgur.com/a/k6Tx1N9"
+body: """
I’ve got an old oscilloscope and a function generator that I’m trying to use to play around and get more familiar with this kinda stuff. I’m mostly new to electronics (especially analog ones) and I’m having a hard time getting them setup properly.\n
\n
Both devices turn on and the controls seemingly work, but I never get anything more than a flat line or random noise on the scope.\n
\n
Any help would be appreciated!\n
\n
The scope is a Sencore PS148A and the generator is a Heathkit SG-1271.
"""
+type: "link"
+lang: "en"
+isOc: false
+hasEmbed: true
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+badges: Doctrine\ORM\PersistentCollection {#2610 …}
+children: [
App\Entity\EntryComment {#2032
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2096 …2}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
+root: null
+body: """
If you are completely new I suggest watching a tutorial. Otherwise some basic tips could be\n
\n
1. if oscilloscope has multiple channels, make sure the channel you connected is the channel nel you see on the screen\n
2. make sure you did the ground connection. You need to connect both signal and ground tips if the probe\n
3. make sure voltage range is fine. If you use a large range in the screen, little amplitude you got may seem like a flat line.\n
4. calibrate your probe, if oscilloscope has that option. But an uncalibrated probe doesn’t explain flat line, it would explain distorted square wave, for example.\n
5. Use another probe. They can get broken. If it is broken all you will see will be the noise the cable pics up like an antenna.\n
6. separate the issue. Connect probe ends to a battery with k own voltage and see what you receive. If it doesn’t work, you know either probe or oscilloscope is wrong.\n
\n
List can get longer really, but I think a tutorial and these can go a long way for the beginning.
"""
+lang: "en"
+isAdult: false
+favouriteCount: 2
+score: 0
+lastActive: DateTime @1687550462 {#2024
date: 2023-06-23 22:01:02.0 +02:00
}
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"@mkstowe@discuss.tchncs.de"
]
+children: Doctrine\ORM\PersistentCollection {#2077 …}
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+votes: Doctrine\ORM\PersistentCollection {#2064 …}
+reports: Doctrine\ORM\PersistentCollection {#2088 …}
+favourites: Doctrine\ORM\PersistentCollection {#2087 …}
+notifications: Doctrine\ORM\PersistentCollection {#2086 …}
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+createdAt: DateTimeImmutable @1687548774 {#2579
date: 2023-06-23 21:32:54.0 +02:00
}
+__isInitialized__: true
…2
} |
|
Show voter details
|
100 |
DENIED
|
moderate
|
Proxies\__CG__\App\Entity\Entry {#2096
+user: Proxies\__CG__\App\Entity\User {#2558 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+domain: Proxies\__CG__\App\Entity\Domain {#2598 …}
+slug: "How-to-setup-this-function-generator-with-this-oscilloscope"
+title: "How to setup this function generator with this oscilloscope?"
+url: "https://imgur.com/a/k6Tx1N9"
+body: """
I’ve got an old oscilloscope and a function generator that I’m trying to use to play around and get more familiar with this kinda stuff. I’m mostly new to electronics (especially analog ones) and I’m having a hard time getting them setup properly.\n
\n
Both devices turn on and the controls seemingly work, but I never get anything more than a flat line or random noise on the scope.\n
\n
Any help would be appreciated!\n
\n
The scope is a Sencore PS148A and the generator is a Heathkit SG-1271.
"""
+type: "link"
+lang: "en"
+isOc: false
+hasEmbed: true
+commentCount: 2
+favouriteCount: 5
+score: 0
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date: 2023-06-24 17:27:24.0 +02:00
}
+ip: null
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+comments: Doctrine\ORM\PersistentCollection {#2600 …}
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+favourites: Doctrine\ORM\PersistentCollection {#2606 …}
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+badges: Doctrine\ORM\PersistentCollection {#2610 …}
+children: [
App\Entity\EntryComment {#2032
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2096 …2}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
+root: null
+body: """
If you are completely new I suggest watching a tutorial. Otherwise some basic tips could be\n
\n
1. if oscilloscope has multiple channels, make sure the channel you connected is the channel nel you see on the screen\n
2. make sure you did the ground connection. You need to connect both signal and ground tips if the probe\n
3. make sure voltage range is fine. If you use a large range in the screen, little amplitude you got may seem like a flat line.\n
4. calibrate your probe, if oscilloscope has that option. But an uncalibrated probe doesn’t explain flat line, it would explain distorted square wave, for example.\n
5. Use another probe. They can get broken. If it is broken all you will see will be the noise the cable pics up like an antenna.\n
6. separate the issue. Connect probe ends to a battery with k own voltage and see what you receive. If it doesn’t work, you know either probe or oscilloscope is wrong.\n
\n
List can get longer really, but I think a tutorial and these can go a long way for the beginning.
"""
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App\Entity\EntryComment {#2032
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+domain: Proxies\__CG__\App\Entity\Domain {#2598 …}
+slug: "How-to-setup-this-function-generator-with-this-oscilloscope"
+title: "How to setup this function generator with this oscilloscope?"
+url: "https://imgur.com/a/k6Tx1N9"
+body: """
I’ve got an old oscilloscope and a function generator that I’m trying to use to play around and get more familiar with this kinda stuff. I’m mostly new to electronics (especially analog ones) and I’m having a hard time getting them setup properly.\n
\n
Both devices turn on and the controls seemingly work, but I never get anything more than a flat line or random noise on the scope.\n
\n
Any help would be appreciated!\n
\n
The scope is a Sencore PS148A and the generator is a Heathkit SG-1271.
"""
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date: 2023-06-23 21:32:54.0 +02:00
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…2
}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
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+body: """
If you are completely new I suggest watching a tutorial. Otherwise some basic tips could be\n
\n
1. if oscilloscope has multiple channels, make sure the channel you connected is the channel nel you see on the screen\n
2. make sure you did the ground connection. You need to connect both signal and ground tips if the probe\n
3. make sure voltage range is fine. If you use a large range in the screen, little amplitude you got may seem like a flat line.\n
4. calibrate your probe, if oscilloscope has that option. But an uncalibrated probe doesn’t explain flat line, it would explain distorted square wave, for example.\n
5. Use another probe. They can get broken. If it is broken all you will see will be the noise the cable pics up like an antenna.\n
6. separate the issue. Connect probe ends to a battery with k own voltage and see what you receive. If it doesn’t work, you know either probe or oscilloscope is wrong.\n
\n
List can get longer really, but I think a tutorial and these can go a long way for the beginning.
"""
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App\Entity\EntryComment {#2032
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2096
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+domain: Proxies\__CG__\App\Entity\Domain {#2598 …}
+slug: "How-to-setup-this-function-generator-with-this-oscilloscope"
+title: "How to setup this function generator with this oscilloscope?"
+url: "https://imgur.com/a/k6Tx1N9"
+body: """
I’ve got an old oscilloscope and a function generator that I’m trying to use to play around and get more familiar with this kinda stuff. I’m mostly new to electronics (especially analog ones) and I’m having a hard time getting them setup properly.\n
\n
Both devices turn on and the controls seemingly work, but I never get anything more than a flat line or random noise on the scope.\n
\n
Any help would be appreciated!\n
\n
The scope is a Sencore PS148A and the generator is a Heathkit SG-1271.
"""
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date: 2023-06-23 21:32:54.0 +02:00
}
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…2
}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
+root: null
+body: """
If you are completely new I suggest watching a tutorial. Otherwise some basic tips could be\n
\n
1. if oscilloscope has multiple channels, make sure the channel you connected is the channel nel you see on the screen\n
2. make sure you did the ground connection. You need to connect both signal and ground tips if the probe\n
3. make sure voltage range is fine. If you use a large range in the screen, little amplitude you got may seem like a flat line.\n
4. calibrate your probe, if oscilloscope has that option. But an uncalibrated probe doesn’t explain flat line, it would explain distorted square wave, for example.\n
5. Use another probe. They can get broken. If it is broken all you will see will be the noise the cable pics up like an antenna.\n
6. separate the issue. Connect probe ends to a battery with k own voltage and see what you receive. If it doesn’t work, you know either probe or oscilloscope is wrong.\n
\n
List can get longer really, but I think a tutorial and these can go a long way for the beginning.
"""
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date: 2023-06-23 22:01:02.0 +02:00
}
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} |
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App\Entity\EntryComment {#2032
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#2096
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+slug: "How-to-setup-this-function-generator-with-this-oscilloscope"
+title: "How to setup this function generator with this oscilloscope?"
+url: "https://imgur.com/a/k6Tx1N9"
+body: """
I’ve got an old oscilloscope and a function generator that I’m trying to use to play around and get more familiar with this kinda stuff. I’m mostly new to electronics (especially analog ones) and I’m having a hard time getting them setup properly.\n
\n
Both devices turn on and the controls seemingly work, but I never get anything more than a flat line or random noise on the scope.\n
\n
Any help would be appreciated!\n
\n
The scope is a Sencore PS148A and the generator is a Heathkit SG-1271.
"""
+type: "link"
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date: 2023-06-23 21:32:54.0 +02:00
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…2
}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
+root: null
+body: """
If you are completely new I suggest watching a tutorial. Otherwise some basic tips could be\n
\n
1. if oscilloscope has multiple channels, make sure the channel you connected is the channel nel you see on the screen\n
2. make sure you did the ground connection. You need to connect both signal and ground tips if the probe\n
3. make sure voltage range is fine. If you use a large range in the screen, little amplitude you got may seem like a flat line.\n
4. calibrate your probe, if oscilloscope has that option. But an uncalibrated probe doesn’t explain flat line, it would explain distorted square wave, for example.\n
5. Use another probe. They can get broken. If it is broken all you will see will be the noise the cable pics up like an antenna.\n
6. separate the issue. Connect probe ends to a battery with k own voltage and see what you receive. If it doesn’t work, you know either probe or oscilloscope is wrong.\n
\n
List can get longer really, but I think a tutorial and these can go a long way for the beginning.
"""
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date: 2023-06-23 22:01:02.0 +02:00
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} |
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Proxies\__CG__\App\Entity\Entry {#1382
+user: Proxies\__CG__\App\Entity\User {#2181 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: Proxies\__CG__\App\Entity\Image {#2617 …}
+domain: Proxies\__CG__\App\Entity\Domain {#2619 …}
+slug: "SOLVED-A-pull-up-resistor-increases-the-low-side-of-a"
+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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1 => App\Entity\EntryComment {#2030
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Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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}
+body: "It should do the trick I think. If you are working on electronics a lot, you may consider buying a breadboard and variety of resistors, capacitors and nmos, pros, bjt transistors in bulk for quick fixes instead of waiting for orders to proceed. Have fun"
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…2
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|
Show voter details
|
107 |
DENIED
|
edit
|
Proxies\__CG__\App\Entity\Entry {#1382
+user: Proxies\__CG__\App\Entity\User {#2181 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
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+slug: "SOLVED-A-pull-up-resistor-increases-the-low-side-of-a"
+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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1 => App\Entity\EntryComment {#2030
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+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
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+body: """
Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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date: 2023-06-19 06:35:10.0 +02:00
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}
+body: "It should do the trick I think. If you are working on electronics a lot, you may consider buying a breadboard and variety of resistors, capacitors and nmos, pros, bjt transistors in bulk for quick fixes instead of waiting for orders to proceed. Have fun"
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…2
} |
|
Show voter details
|
108 |
DENIED
|
moderate
|
Proxies\__CG__\App\Entity\Entry {#1382
+user: Proxies\__CG__\App\Entity\User {#2181 …}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: Proxies\__CG__\App\Entity\Image {#2617 …}
+domain: Proxies\__CG__\App\Entity\Domain {#2619 …}
+slug: "SOLVED-A-pull-up-resistor-increases-the-low-side-of-a"
+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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1 => App\Entity\EntryComment {#2030
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+parent: Proxies\__CG__\App\Entity\EntryComment {#2081 …}
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+user: App\Entity\User {#264 …}
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+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
+root: null
+body: """
Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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App\Entity\EntryComment {#2030
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+slug: "SOLVED-A-pull-up-resistor-increases-the-low-side-of-a"
+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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+body: """
Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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Show voter details
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111 |
DENIED
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edit
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App\Entity\EntryComment {#2030
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+slug: "SOLVED-A-pull-up-resistor-increases-the-low-side-of-a"
+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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1 => App\Entity\EntryComment {#2030}
2 => App\Entity\EntryComment {#2457
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+magazine: Proxies\__CG__\App\Entity\Magazine {#1385 …}
+image: null
+parent: null
+root: null
+body: """
Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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App\Entity\EntryComment {#2030
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+slug: "SOLVED-A-pull-up-resistor-increases-the-low-side-of-a"
+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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+body: """
Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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Show voter details
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moderate
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App\Entity\EntryComment {#2457
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+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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date: 2023-06-21 17:59:31.0 +02:00
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Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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Show voter details
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115 |
DENIED
|
edit
|
App\Entity\EntryComment {#2457
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#1382
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+slug: "SOLVED-A-pull-up-resistor-increases-the-low-side-of-a"
+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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|
Show voter details
|
116 |
DENIED
|
moderate
|
App\Entity\EntryComment {#2457
+user: App\Entity\User {#264 …}
+entry: Proxies\__CG__\App\Entity\Entry {#1382
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+slug: "SOLVED-A-pull-up-resistor-increases-the-low-side-of-a"
+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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date: 2023-06-21 17:59:31.0 +02:00
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date: 2023-06-18 17:27:58.0 +02:00
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Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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Show voter details
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App\Entity\EntryComment {#2031
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+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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+body: """
Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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+body: "It should do the trick I think. If you are working on electronics a lot, you may consider buying a breadboard and variety of resistors, capacitors and nmos, pros, bjt transistors in bulk for quick fixes instead of waiting for orders to proceed. Have fun"
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DENIED
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App\Entity\EntryComment {#2031
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+slug: "SOLVED-A-pull-up-resistor-increases-the-low-side-of-a"
+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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1 => App\Entity\EntryComment {#2030
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+body: """
Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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App\Entity\EntryComment {#2031
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+slug: "SOLVED-A-pull-up-resistor-increases-the-low-side-of-a"
+title: "[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it?"
+url: "https://electronics.stackexchange.com/q/670924/107963"
+body: """
Solution\n
--------\n
\n
Using an open drain buffer like the `74LVC1G07` did the trick. Note that this part only works for inputs with a pull-up resistor. There are other parts from the same lineup that can work with any input.\n
\n
Problem\n
-------\n
\n
> I have an ebike computer that has two inputs that accept square wave signals. The range is 0-5V. One of the inputs has no pull-up/down resistors on it. When I hook up a device producing signal, the signal is detected correctly. Both highs and lows are detected correctly. The other input has a built-in pull-up resistor. When I hook the same signal to it, only the high side is detected. Measuring the voltage of the low side, it's a bit higher than when hooked to the other input and I'm guessing it isn't crossing the low threshold the computer expects in order to register the low.\n
\n
> Am I right in thinking that the pull-up resistor is increasing the lows?\n
\n
> Is it possible to counteract the internal pull-up resistor by hooking a pull-down resistor to the input?\n
\n
> I'm a software guy with decent soldering skills and minimal knowledge in electronics so please answer like I'm not the brightest electronic bulb on the tree.\n
\n
> Thank you in advance!\n
\n
Cross-posting my question from StackExchange.
"""
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1 => App\Entity\EntryComment {#2030
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+body: """
Problem you are having could be\n
\n
1. output impedance of the signal generator you use to generate the square wave. When you set it to low, output impedance of the signal generator builds a voltage divider together with the internal pull up, and the device ends up sensing a higher voltage than "low". This is something you can see if you have an oscilloscope, try to hook up a probe to the input and ensure whether you get what you set in the signal generator.\n
2. some signal sources have no or limited capacity to drain current. And when you set it to low, this is exactly what it us supposed to do, drain current from the internal pullup.\n
\n
As you mentioned in another comment, solution is a simple buffer. This could be an opamp, but even a simple nmos transistor should suffice (open drain as you said). But you need yo be careful with current ratings of the transistor, which you can easily calculate by dividing 5V by the pull up resistor. Send a message if you need help.\n
\n
Before these, I suggest you yo use an oscilloscope or multimeter to measure the voltage when it is supposed to be low, and see that in fact the problem is that voltage at the input doesn't go "low".
"""
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