I just picked up a cheap 32x24 led matrix board from a surplus store and I would like to control it with the arduino. The board has (8) UCN 5801R and (1) SN74LS164N. I have no idea how to work with these other than some very basic experience with a shift register. After spending over an hour fiddling with my multimeter this thing still makes little sense to me.
Here are the datasheets for the ICs:
The board was clearly meant to be chained to other boards because it has 10 pins on each side (two being ground). It looks like it was cut very roughly from both sides but I am hoping that these were made strategically to allow the board to still function.
Here are some pictures:
Close up of driver circuit: http://img594.imageshack.us/i/img1151e.jpg/
Close up of driver circuit (reverse side): http://img816.imageshack.us/i/img1157.jpg/
Any advice on getting this thing up and running will be appreciated. And if not, at least I will have gotten 768 LEDs for 4 bucks ;)