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Pixel String Issues

Started by PittFan, October 23, 2016, 06:29:19 PM

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PittFan

I have a 10 120 pixel strings attached to a F16v1 controller.  This is connected to my Pi FPP.  I have the FPP in bridge mode and am using Xlights.
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Two of these strings appear to have issues as they will flicker/flash at unpredictable times.  The flashing will show up at any time even though I have control of each pixel.
Essentially all the pixels after a certain pixel will flash red, blue or green very briefly.  But each pixel will work well otherwise.  It is very random.
To me, this suggests that one (or more pixels are bad).  How do I find the bad pixel as the flashing doesn't always occur from the same spot in the string.   It could be the last 20 pixels once and much of the string another time.  Does that suggest the first pixel is bad?  If a bad pixel is present in the center of the string, can it make pixels that come before it behave badly as well?

The flash will also occur only when only power is applied to the strings (i.e. no Xlights output)as well.  But then it only seems to be a random couple of nodes that light up at a time.

Thanks

Scottishsurfer

Could it be a power issue?  How many pixels are you trying to drive, and what voltage?  It was happening to me yesterday until I split the strings. Just a thought.

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