I am new to this forum so i hope that you can help me out guys.
I tried to find but i couldnt, informations about how many shift registers (595) you can attach to 3 pins on arduino, i found only examples for 2 registers, and i was wondering how many outputs can i get… what i am trying to do is, to control through serial, light bulbs making a big screen of them(and play a pong on it or something ), and switch them on and off using a transmiter that closes cuircuit on +5V (logical 1) and opens on 0V, it is a simple electromagnetic switch. I figured out how to control 80 bulbs with 2 registers on each 3 pins, so i could get 80 bulbs. I was also thinking about Max7129 but it works fine only with led matrixes because it refreshes in about 50Hz so human eye can’t see that at the moment not all led’s are blinking, but in this situation i need to keep the 5V all the time if i want to make the bulb light…
thanks for any help!