NeoMatrix only lights up 42 LEDs

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asymptote
 
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NeoMatrix only lights up 42 LEDs

Post by asymptote »

Hello,

Hello,

I recently purchased a NeoMatrix from your shop. Upon opening it and
programming it, I've noticed that only 42 pixels light up -- all pixels
past the 42nd pixel refuse to light up. I've attached an image.

In my experience, this is due to a bad pixel in the strip and requires a
new part. Before I go and assume that it's a dead pixel -- is there anything else I can do to figure out if this is the issue or not?

thanks,
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neomatrix.jpg
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adafruit_support_rick
 
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Re: NeoMatrix only lights up 42 LEDs

Post by adafruit_support_rick »

Does pressing on the first dead pixel make anything happen?
I presume you have your sketch set up for 64 pixels...

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asymptote
 
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Re: NeoMatrix only lights up 42 LEDs

Post by asymptote »

My code is set up for 64 pixels; when I set it to less than 42, I can light up exactly however many I'd like, but as soon as I hit over 42, it stops.

I pushed down on the first dead pixels, and that seemed to momentarily allow the remaining pixels to be programmed -- but unless I'm holding it down, I'm unable to send data to the pixels.

Is there a way I can reflow the solder easily without damaging the LED?
Last edited by asymptote on Wed Oct 01, 2014 11:39 am, edited 1 time in total.

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adafruit_support_rick
 
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Re: NeoMatrix only lights up 42 LEDs

Post by adafruit_support_rick »

Please email [email protected] with a link to this thread for a replacement matrix

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asymptote
 
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Re: NeoMatrix only lights up 42 LEDs

Post by asymptote »

My replacement board is exhibiting a similar problem -- in the attached image, all of the LEDs are supposed to be blue, but after a certain pixel, the colors are off, and then eventually die out completely.

I tried pushing down on the first dead pixel but this did not resolve the issue.

Do you have any thoughts on what could be wrong? Is it another dead board?

thanks,

nathan lachenmyer
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Franklin97355
 
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Re: NeoMatrix only lights up 42 LEDs

Post by Franklin97355 »

What are you using for power? And what code are you running? If you have changed it at all please post it here.

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