Hi everyone !
I'm currently building a 30x30 red led matrix; copying the idea from that popular instructable : http://www.instructables.com/id/Super-Pong-Coffee-Table/?ALLSTEPS
I didn't work with the PIC, so i'm doing it with arduino.
So I control the colums with 4 595, no problem, but what about the rows ?
I crawled the internet for hours :
- use several 4017 decade counter ? No, because there is always one output one HIGH level; applying H on its RESET pin make the Q0 output work.
- use 595 ? Why not, but this must be a HUGE waste of time (knowing the row me must scan, send 8 bits to the concerned 595, and this 30 times in order to refresh the screen completely) ?
- or maybe still use 4 4017 with their Q0 output not wired, but using a 4017 for only 3 ouput pins is a bit frustrating...
Here are the schematics (2nd solution) :
Since the arduino will have to run a lot more complex programs on top of that (games, ...), have you got any (other) idea ?
I've seen lots of posts about led matrix. MAX7219, TLC5940, WS2801 (well that one is rather for RGB leds) ...
The only chips I have are 595. And 74LS373, but I have no idea how that one work.
Thanks a lot for your help