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?