Dead pixel in 8x8 dotstar matrix

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j__t
 
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Dead pixel in 8x8 dotstar matrix

Post by j__t »

Hello, I have twelve DotStar High Density 8x8 Grid 's chained up. I just got these, they are brand new.

The 11th one seems to have a dead pixel (see attached picture).

Calling pixels.fill(color) colors all pixels, leaving the one dead.

And when I attempt to target the pixel directly I can't address it:

pixels[694] = (255,0,0) # selects pixel right before it
pixels[695] = (255,0,0) # selects pixel right after it

Is this an issue with having so many chained, or do I have a faulty matrix?
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Re: Dead pixel in 8x8 dotstar matrix

Post by adafruit_support_carter »

Would it be possible to remove that one from the chain so it could be tested stand alone?

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Re: Dead pixel in 8x8 dotstar matrix

Post by j__t »

It will take a little craftiness but won't be any more difficult than replacing it. Will give it shot and report back.

Thank you!

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Re: Dead pixel in 8x8 dotstar matrix

Post by j__t »

Also, just curious - can this be a result of soldering / wiring? Or is it usually an issue with the matrix

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Re: Dead pixel in 8x8 dotstar matrix

Post by adafruit_support_carter »

The behavior is generally indicating a potential issue with the PCB, not the wiring. But it's worth testing the board in isolation to verify.

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Re: Dead pixel in 8x8 dotstar matrix

Post by j__t »

Isolated, it does seem to be the matrix
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Re: Dead pixel in 8x8 dotstar matrix

Post by adafruit_support_carter »

OK, thanks for trying. Let's just replace it. Test the replacement before installing in your project.

Send an email to [email protected] with a link to this thread and your order number and they can send your a replacement 8x8 DotStar Matrix.

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Re: Dead pixel in 8x8 dotstar matrix

Post by j__t »

🙏
will do thank you

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Re: Dead pixel in 8x8 dotstar matrix

Post by j__t »

was fixed with replacement matrix, thank you

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