Dear Support Team,
I am contacting you to get some wisdom on troubleshooting some issues I have with a LED strip. On the picture you can see that the strip is cut in two halves (9 LED each) and recently the second half is not lighting up anymore (on the right).
I checked the code the Pin 9 has 18 LED count declared, I tried to cut the first Neopixel after the junction and solder the strip again, without success. The soldering of the wires has been redone, I could measure a tension of 5.13V between the two pixels on the right (on the copper contact) between 5V and GND.
Any suggestions on how to identify the defective pixel and cut it off?
I greatly appreciate your help here!
Wishing you a nice rest of the day :)
Raphael <Nalath>
Issue with LED Strip PID2841
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Please be positive and constructive with your questions and comments.
- mikeysklar
- Posts: 14193
- Joined: Mon Aug 01, 2016 8:10 pm
Re: Issue with LED Strip PID2841
The green 5v pin on the right side looks like a weak solder connection.
Can you resolder the wires to the pads and measure the resistance over the gap? I suspect the jumper wires more than a dead LED which is rare.
Can you resolder the wires to the pads and measure the resistance over the gap? I suspect the jumper wires more than a dead LED which is rare.
- Nalath
- Posts: 7
- Joined: Sat Jun 13, 2020 12:28 pm
Re: Issue with LED Strip PID2841
Thanks for your feedback. The 5V is actually carried over despite the appearance (on the next junction further right the 5.13V are measured between 5V and GND). Plus it was working before that, so I more suspect a dead LED... Question is how to identify it?
- mikeysklar
- Posts: 14193
- Joined: Mon Aug 01, 2016 8:10 pm
Re: Issue with LED Strip PID2841
Are you able to measure the voltage all the way through to the far end of the strip?
I’m not convinced it is a failed LED as the NeoPixels can continue to work even with a dead pixel.
You could set the code to illuminate one pixel and try and make a 3 pin connection to each LED individually on the second half of the strip that is not illuminating.
I’m not convinced it is a failed LED as the NeoPixels can continue to work even with a dead pixel.
You could set the code to illuminate one pixel and try and make a 3 pin connection to each LED individually on the second half of the strip that is not illuminating.
- Nalath
- Posts: 7
- Joined: Sat Jun 13, 2020 12:28 pm
Re: Issue with LED Strip PID2841
Thanks @mikeysklar for your feedback.
I actually found the issue. It was link to the copper end of the Dout pin that pealed off slightly from the neopixel before the junction. This caused the instable signal downwards and the next pixels stopping to work.
I eliminated that pixel and soldered again this is now working fine!
Topic can be closed!
I actually found the issue. It was link to the copper end of the Dout pin that pealed off slightly from the neopixel before the junction. This caused the instable signal downwards and the next pixels stopping to work.
I eliminated that pixel and soldered again this is now working fine!
Topic can be closed!
Please be positive and constructive with your questions and comments.