Multiplexing with Arduino

Projects General Guidance
1

Hi all,

I am trying to work out how to multiplex with an Arduino. I currently have been able to multiplex so that I can light up 16 LED's, using only 3 I/O pins on my Arduino. This is using a 74HC595 chip, and a breadboard.

I am hoping to be able to control around 100 output signals from my Arduino Uno. Does anyone have any recommendations for what equipment I would use, and how I could build it?

Thanks,
DH

2

You can daisy chain those chips. Read about it in example two: here

3

Yes... daisy chain the shift registers, you need a total of 2x10 outputs so 3 such shift registers (offering 24 outputs between them) can control 100 LEDs.