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Proxies\__CG__\App\Entity\Entry {#1525
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+body: "Hello everyone! I’m designing a PCB and I have some doubts about how to connect the 4 resistors at the top to capacitor C34. They are 4 traces, and all of them terminate at the same pad of the capacitor. As I have currently placed them, are they connected correctly? Or should I connect them in a different way?"
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Show voter details
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3 |
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edit
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Proxies\__CG__\App\Entity\Entry {#1525
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Show voter details
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4 |
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moderate
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Proxies\__CG__\App\Entity\Entry {#1525
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Show voter details
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5 |
DENIED
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ROLE_USER
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null |
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6 |
DENIED
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moderate
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App\Entity\EntryComment {#1550
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Show voter details
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7 |
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edit
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App\Entity\EntryComment {#1550
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+body: "Hello everyone! I’m designing a PCB and I have some doubts about how to connect the 4 resistors at the top to capacitor C34. They are 4 traces, and all of them terminate at the same pad of the capacitor. As I have currently placed them, are they connected correctly? Or should I connect them in a different way?"
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Show voter details
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8 |
DENIED
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moderate
|
App\Entity\EntryComment {#1550
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-id: 751
-titleTs: "'connect':1 'pad':7 'sever':2 'track':3"
-bodyTs: "'4':18,28 'c34':25 'capacitor':24,41 'connect':16,50,55 'correct':51 'current':45 'design':5 'differ':59 'doubt':12 'everyon':2 'hello':1 'm':4 'pad':38 'pcb':7 'place':46 'resistor':19 'termin':34 'top':22 'trace':29 'way':60"
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date: 2023-07-04 02:17:38.0 +02:00
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…2
}
+magazine: Proxies\__CG__\App\Entity\Magazine {#1586 …}
+image: null
+parent: null
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+body: "As other have mentioned, what you got is fine for most basic applications. If you use a polygon pour you can decrease the resistance of the trace and consolidate it all into one large trace. I also see you using traces for ground, the general rule is if you have the room, make all the unused space on at least one of your layers ground with a polygon pour. This makes connecting ground easier, makes your ground more reliable (decreased resistance) and makes your board less susceptible to external noise"
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date: 2023-07-04 12:43:43.0 +02:00
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} |
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Show voter details
|
9 |
DENIED
|
ROLE_USER
|
null |
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Show voter details
|
10 |
DENIED
|
moderate
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Proxies\__CG__\App\Entity\Entry {#1577
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+magazine: Proxies\__CG__\App\Entity\Magazine {#1586 …}
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+slug: "555-based-PWM-Dimmer-not-working-only-with-LED-strips"
+title: "555 based PWM Dimmer not working only with LED strips"
+url: "https://discuss.tchncs.de/pictrs/image/0f232f11-9887-42e5-ba59-6aed360e08a0.jpeg"
+body: """
I bought a PWM Dimmer based on a 555 from AliExpress to regulate the brightness of a 12V 1A 1 meter LED strip, I already built one myself years ago on a perfboard but this one was the exact dimensions I needed for a project. I built mine from components from AliExpress and components found in old electronics so I thought nothing functionally would change The dimmer is this one [diymore.cc/…/pwm-10a-speed-regulation-led-dimming…](https://www.diymore.cc/products/pwm-10a-speed-regulation-led-dimming-ultra-high-linearity-band-switch) but I attached a real photo of the one I got from AliExpress My problem is that it isn’t doing any regulation while connected to LED strips, I tried with the 1m one and with another light that has three 30cm LED strips in parallel Every other light or motor I connected to it seemed to make it work. I really have no idea what could be causing this, maybe it’s sensible to capacitance? LED strips are two long straight parallel contacts but I don’t think it’s enough to cause anything as displayed here in the video: [live.staticflickr.com/video/…/1080p.mp4?s=eyJpIjo…](https://live.staticflickr.com/video/53017878188/54f865d36d/1080p.mp4?s=eyJpIjo1MzAxNzg3ODE4OCwiZSI6MTY4ODMxNzgwMCwicyI6ImI2MjZiMzk3MjExNTQxZWIyOTYwYzAyNTRmZDNhZDZjZTcwOWUxOGYiLCJ2IjoxfQ)\n
\n
Please no prejudice on that oscilloscope, it’s good for what its made for, it’s “calibrated”, it shows a clean square waveform on my simple diy dimmer ([photo](https://imgur.com/Cd1ezm8) to let you see what I mean with simple) versus what is shown in the video with the AliExpress one, an hybrid ramp/square. In the first part I show one of those LED strip that doesn’t work, in the second part I show one that does work, just like every other light or motor I’ve tried
"""
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+image: null
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+root: null
+body: "There is a couple of things I would suggest looking into. First just make sure the LED strip still works, then try a adding a current limiting resistor to the strip, even if it already has one it could help. A unity gain buffer could help as well. I also noticed that there is no active regulator on it, and all the work is put on a zener so I would also say either jank in an active regulator or even easier, supply it with a regulated rail"
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…2
} |
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Show voter details
|
11 |
DENIED
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edit
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Proxies\__CG__\App\Entity\Entry {#1577
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+slug: "555-based-PWM-Dimmer-not-working-only-with-LED-strips"
+title: "555 based PWM Dimmer not working only with LED strips"
+url: "https://discuss.tchncs.de/pictrs/image/0f232f11-9887-42e5-ba59-6aed360e08a0.jpeg"
+body: """
I bought a PWM Dimmer based on a 555 from AliExpress to regulate the brightness of a 12V 1A 1 meter LED strip, I already built one myself years ago on a perfboard but this one was the exact dimensions I needed for a project. I built mine from components from AliExpress and components found in old electronics so I thought nothing functionally would change The dimmer is this one [diymore.cc/…/pwm-10a-speed-regulation-led-dimming…](https://www.diymore.cc/products/pwm-10a-speed-regulation-led-dimming-ultra-high-linearity-band-switch) but I attached a real photo of the one I got from AliExpress My problem is that it isn’t doing any regulation while connected to LED strips, I tried with the 1m one and with another light that has three 30cm LED strips in parallel Every other light or motor I connected to it seemed to make it work. I really have no idea what could be causing this, maybe it’s sensible to capacitance? LED strips are two long straight parallel contacts but I don’t think it’s enough to cause anything as displayed here in the video: [live.staticflickr.com/video/…/1080p.mp4?s=eyJpIjo…](https://live.staticflickr.com/video/53017878188/54f865d36d/1080p.mp4?s=eyJpIjo1MzAxNzg3ODE4OCwiZSI6MTY4ODMxNzgwMCwicyI6ImI2MjZiMzk3MjExNTQxZWIyOTYwYzAyNTRmZDNhZDZjZTcwOWUxOGYiLCJ2IjoxfQ)\n
\n
Please no prejudice on that oscilloscope, it’s good for what its made for, it’s “calibrated”, it shows a clean square waveform on my simple diy dimmer ([photo](https://imgur.com/Cd1ezm8) to let you see what I mean with simple) versus what is shown in the video with the AliExpress one, an hybrid ramp/square. In the first part I show one of those LED strip that doesn’t work, in the second part I show one that does work, just like every other light or motor I’ve tried
"""
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+image: null
+parent: null
+root: null
+body: "There is a couple of things I would suggest looking into. First just make sure the LED strip still works, then try a adding a current limiting resistor to the strip, even if it already has one it could help. A unity gain buffer could help as well. I also noticed that there is no active regulator on it, and all the work is put on a zener so I would also say either jank in an active regulator or even easier, supply it with a regulated rail"
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…2
} |
|
Show voter details
|
12 |
DENIED
|
moderate
|
Proxies\__CG__\App\Entity\Entry {#1577
+user: Proxies\__CG__\App\Entity\User {#1620 …}
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+slug: "555-based-PWM-Dimmer-not-working-only-with-LED-strips"
+title: "555 based PWM Dimmer not working only with LED strips"
+url: "https://discuss.tchncs.de/pictrs/image/0f232f11-9887-42e5-ba59-6aed360e08a0.jpeg"
+body: """
I bought a PWM Dimmer based on a 555 from AliExpress to regulate the brightness of a 12V 1A 1 meter LED strip, I already built one myself years ago on a perfboard but this one was the exact dimensions I needed for a project. I built mine from components from AliExpress and components found in old electronics so I thought nothing functionally would change The dimmer is this one [diymore.cc/…/pwm-10a-speed-regulation-led-dimming…](https://www.diymore.cc/products/pwm-10a-speed-regulation-led-dimming-ultra-high-linearity-band-switch) but I attached a real photo of the one I got from AliExpress My problem is that it isn’t doing any regulation while connected to LED strips, I tried with the 1m one and with another light that has three 30cm LED strips in parallel Every other light or motor I connected to it seemed to make it work. I really have no idea what could be causing this, maybe it’s sensible to capacitance? LED strips are two long straight parallel contacts but I don’t think it’s enough to cause anything as displayed here in the video: [live.staticflickr.com/video/…/1080p.mp4?s=eyJpIjo…](https://live.staticflickr.com/video/53017878188/54f865d36d/1080p.mp4?s=eyJpIjo1MzAxNzg3ODE4OCwiZSI6MTY4ODMxNzgwMCwicyI6ImI2MjZiMzk3MjExNTQxZWIyOTYwYzAyNTRmZDNhZDZjZTcwOWUxOGYiLCJ2IjoxfQ)\n
\n
Please no prejudice on that oscilloscope, it’s good for what its made for, it’s “calibrated”, it shows a clean square waveform on my simple diy dimmer ([photo](https://imgur.com/Cd1ezm8) to let you see what I mean with simple) versus what is shown in the video with the AliExpress one, an hybrid ramp/square. In the first part I show one of those LED strip that doesn’t work, in the second part I show one that does work, just like every other light or motor I’ve tried
"""
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+body: "There is a couple of things I would suggest looking into. First just make sure the LED strip still works, then try a adding a current limiting resistor to the strip, even if it already has one it could help. A unity gain buffer could help as well. I also noticed that there is no active regulator on it, and all the work is put on a zener so I would also say either jank in an active regulator or even easier, supply it with a regulated rail"
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+title: "555 based PWM Dimmer not working only with LED strips"
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I bought a PWM Dimmer based on a 555 from AliExpress to regulate the brightness of a 12V 1A 1 meter LED strip, I already built one myself years ago on a perfboard but this one was the exact dimensions I needed for a project. I built mine from components from AliExpress and components found in old electronics so I thought nothing functionally would change The dimmer is this one [diymore.cc/…/pwm-10a-speed-regulation-led-dimming…](https://www.diymore.cc/products/pwm-10a-speed-regulation-led-dimming-ultra-high-linearity-band-switch) but I attached a real photo of the one I got from AliExpress My problem is that it isn’t doing any regulation while connected to LED strips, I tried with the 1m one and with another light that has three 30cm LED strips in parallel Every other light or motor I connected to it seemed to make it work. I really have no idea what could be causing this, maybe it’s sensible to capacitance? LED strips are two long straight parallel contacts but I don’t think it’s enough to cause anything as displayed here in the video: [live.staticflickr.com/video/…/1080p.mp4?s=eyJpIjo…](https://live.staticflickr.com/video/53017878188/54f865d36d/1080p.mp4?s=eyJpIjo1MzAxNzg3ODE4OCwiZSI6MTY4ODMxNzgwMCwicyI6ImI2MjZiMzk3MjExNTQxZWIyOTYwYzAyNTRmZDNhZDZjZTcwOWUxOGYiLCJ2IjoxfQ)\n
\n
Please no prejudice on that oscilloscope, it’s good for what its made for, it’s “calibrated”, it shows a clean square waveform on my simple diy dimmer ([photo](https://imgur.com/Cd1ezm8) to let you see what I mean with simple) versus what is shown in the video with the AliExpress one, an hybrid ramp/square. In the first part I show one of those LED strip that doesn’t work, in the second part I show one that does work, just like every other light or motor I’ve tried
"""
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App\Entity\EntryComment {#1609
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+body: """
I bought a PWM Dimmer based on a 555 from AliExpress to regulate the brightness of a 12V 1A 1 meter LED strip, I already built one myself years ago on a perfboard but this one was the exact dimensions I needed for a project. I built mine from components from AliExpress and components found in old electronics so I thought nothing functionally would change The dimmer is this one [diymore.cc/…/pwm-10a-speed-regulation-led-dimming…](https://www.diymore.cc/products/pwm-10a-speed-regulation-led-dimming-ultra-high-linearity-band-switch) but I attached a real photo of the one I got from AliExpress My problem is that it isn’t doing any regulation while connected to LED strips, I tried with the 1m one and with another light that has three 30cm LED strips in parallel Every other light or motor I connected to it seemed to make it work. I really have no idea what could be causing this, maybe it’s sensible to capacitance? LED strips are two long straight parallel contacts but I don’t think it’s enough to cause anything as displayed here in the video: [live.staticflickr.com/video/…/1080p.mp4?s=eyJpIjo…](https://live.staticflickr.com/video/53017878188/54f865d36d/1080p.mp4?s=eyJpIjo1MzAxNzg3ODE4OCwiZSI6MTY4ODMxNzgwMCwicyI6ImI2MjZiMzk3MjExNTQxZWIyOTYwYzAyNTRmZDNhZDZjZTcwOWUxOGYiLCJ2IjoxfQ)\n
\n
Please no prejudice on that oscilloscope, it’s good for what its made for, it’s “calibrated”, it shows a clean square waveform on my simple diy dimmer ([photo](https://imgur.com/Cd1ezm8) to let you see what I mean with simple) versus what is shown in the video with the AliExpress one, an hybrid ramp/square. In the first part I show one of those LED strip that doesn’t work, in the second part I show one that does work, just like every other light or motor I’ve tried
"""
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DENIED
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App\Entity\EntryComment {#1609
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+title: "555 based PWM Dimmer not working only with LED strips"
+url: "https://discuss.tchncs.de/pictrs/image/0f232f11-9887-42e5-ba59-6aed360e08a0.jpeg"
+body: """
I bought a PWM Dimmer based on a 555 from AliExpress to regulate the brightness of a 12V 1A 1 meter LED strip, I already built one myself years ago on a perfboard but this one was the exact dimensions I needed for a project. I built mine from components from AliExpress and components found in old electronics so I thought nothing functionally would change The dimmer is this one [diymore.cc/…/pwm-10a-speed-regulation-led-dimming…](https://www.diymore.cc/products/pwm-10a-speed-regulation-led-dimming-ultra-high-linearity-band-switch) but I attached a real photo of the one I got from AliExpress My problem is that it isn’t doing any regulation while connected to LED strips, I tried with the 1m one and with another light that has three 30cm LED strips in parallel Every other light or motor I connected to it seemed to make it work. I really have no idea what could be causing this, maybe it’s sensible to capacitance? LED strips are two long straight parallel contacts but I don’t think it’s enough to cause anything as displayed here in the video: [live.staticflickr.com/video/…/1080p.mp4?s=eyJpIjo…](https://live.staticflickr.com/video/53017878188/54f865d36d/1080p.mp4?s=eyJpIjo1MzAxNzg3ODE4OCwiZSI6MTY4ODMxNzgwMCwicyI6ImI2MjZiMzk3MjExNTQxZWIyOTYwYzAyNTRmZDNhZDZjZTcwOWUxOGYiLCJ2IjoxfQ)\n
\n
Please no prejudice on that oscilloscope, it’s good for what its made for, it’s “calibrated”, it shows a clean square waveform on my simple diy dimmer ([photo](https://imgur.com/Cd1ezm8) to let you see what I mean with simple) versus what is shown in the video with the AliExpress one, an hybrid ramp/square. In the first part I show one of those LED strip that doesn’t work, in the second part I show one that does work, just like every other light or motor I’ve tried
"""
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date: 2023-07-03 18:13:20.0 +02:00
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…2
}
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+body: "There is a couple of things I would suggest looking into. First just make sure the LED strip still works, then try a adding a current limiting resistor to the strip, even if it already has one it could help. A unity gain buffer could help as well. I also noticed that there is no active regulator on it, and all the work is put on a zener so I would also say either jank in an active regulator or even easier, supply it with a regulated rail"
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