Small 32x32 RGB LED matrix panel color problem

EL Wire/Tape/Panels, LEDs, pixels and strips, LCDs and TFTs, etc products from Adafruit

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DMCo
 
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Small 32x32 RGB LED matrix panel color problem

Post by DMCo »

I have an Arduino project controlling a Medium 32x32 RGB LED matrix panel. It works great. When I purchased the small version, I plugged it into the same connectors, It worked, sort of. It shows all the right shapes in my application but the colors are wrong. I ran the testshapes demo and it draws the right shapes, the plasma demo is beautiful, but I the colors generated are different than when run on the medium matrix.

I've experimented with different color functions, 333, 444, 888, HSV. Color correction gets closer to what I expect, but I don't get orange with 7, 7, 0. I get lavender. With most options I get black.

I'm still experimenting, but it's become frustrating.

Any suggestions?

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pburgess
 
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Re: Small 32x32 RGB LED matrix panel color problem

Post by pburgess »

Strange. I don't have one of the small panels handy to compare against -- could you post photos of the connectors on the back? Sounds like the R/G/B data pins may be in different locations between the two sizes.

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DMCo
 
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Re: Small 32x32 RGB LED matrix panel color problem

Post by DMCo »

I'm sure your correct. I forgot about wiring all those color lines. It had the same single 16 pin header like the larger matrix, so I figured they were the same. I posted a picture of the back. Except for indicating which connector is input and output, it doesn't give a clue to the pin-outs.

As the control lines seem to be the same, I guess I could swap the color lines around until I find the right wiring. First I'll try in software using BGR, or GRB or RBG.

Thank you, that gives me something to go on.
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DMCo
 
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Re: Small 32x32 RGB LED matrix panel color problem

Post by DMCo »

The Blue and Green are swapped. There was a note in the wiring instructions on the adafruit site.

Thanks again

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