Hello. I'm new to physical programming, but I'd like to make one matrix work with Arduino. I have Arduino Mega AT1280. I think I should use 3 MAX7219 chips and maybe ULN2803. But then there is coding issue. I have read many topics about programming MAX7219, but I think I still need coding help to get all 3 of them working. I'd like to make some animations also and need little tips about that. Yesterday I played different melodies from different buttons with Arduino and made LED chases. That was simple. I have some practice with PHP programming so I know a bit about programming logic.
About my project: As I said I have 20x5 matrix, each row's cathodes wired together and columns' have anodes wired tohether. So it should be OK with MAX7219 chip. I'm using white LED diodes, they were about 3,2V and drawing 20mA. And also they had a parameter 20000mcd or smth. I think I can limit them to 10mA.
I place order on MAX7219 chips today and hope to receive them in about a week. So far I'm wiring my LEDs and drilling holes for them.
Finally, a question. Does anybody have experience with Arduino and 3 MAX7219 chips?