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Author Topic: LED matrix scrolling with PNP transistors?  (Read 939 times)
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I made a 16x32 led matrix on a breadboard with 8  red 8x8 matrixes. I connected the 32 columns to 4 shift registers (74HC595's) and connected the rows to 16 pnp transistors and then to two more shift registers.  I have tested this setup with elcojacob's  library here ( http://HTTP://,66988.0.html ). It works well with the example code. I wanted to try scrolling text on this setup, so I tried this code ( At first this didn't work, and I tried doing what it says at the very end. Now all that results is scrolling 5x8 blocks instead of defined letters.

Any help is appreciated!!!!

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