The power supply is about 15' from the two strips currently exhibiting this behavior, and I've tried both 18AWG and 12AWG wire.
Each "strip" is cut into 4 41-pixel segments. Each segment has it's +5/GND wired in parallel from the "end" of the 15' power cable:
(sorry - basic paint programs are all I have at the moment)
At low brightness (#161616, for example), things run beautifully. I can also run a subset of the LEDs at full brightness and leave the rest dark and all is well. However, if I run all LEDs at full brightness, the first LED gets extremely hot, to the point where it stops passing data to the rest of the strip, and in one case to the point of failing entirely. If it was the load of the strip, I would think that the second and third LED's would be warm too; more importantly, I would expect the "first" led in each 41-led segment to be hot, but it's only the first pixel of the FIRST segment.
Also worth noting:
- it doesn't seem to be a consistent problem for all strips. All of them have higher temps in the first LED, but not all of them get super hot.
- Power at the start of each segment is 4.9xx volts. [edit] This turned out not to be true! 4.9 was, at the time, only at very low brightness. [/edit]
Being a software guy, I'm still a trial and error n00b when it comes to troubleshooting circuits. Any tips or pointers for what I should try?
Each "strip" is cut into 4 41-pixel segments. Each segment has it's +5/GND wired in parallel from the "end" of the 15' power cable:
(sorry - basic paint programs are all I have at the moment)
At low brightness (#161616, for example), things run beautifully. I can also run a subset of the LEDs at full brightness and leave the rest dark and all is well. However, if I run all LEDs at full brightness, the first LED gets extremely hot, to the point where it stops passing data to the rest of the strip, and in one case to the point of failing entirely. If it was the load of the strip, I would think that the second and third LED's would be warm too; more importantly, I would expect the "first" led in each 41-led segment to be hot, but it's only the first pixel of the FIRST segment.
Also worth noting:
- it doesn't seem to be a consistent problem for all strips. All of them have higher temps in the first LED, but not all of them get super hot.
- Power at the start of each segment is 4.9xx volts. [edit] This turned out not to be true! 4.9 was, at the time, only at very low brightness. [/edit]
Being a software guy, I'm still a trial and error n00b when it comes to troubleshooting circuits. Any tips or pointers for what I should try?
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