Archive for May, 2016

MAX7219 Seven-segment driver


I have a couple projects in mind where I want to use a seven-segment display (one of them where I want large digits), but I don’t want to dedicate too many pins to driving the display. Also, writing custom code to multiplex the digits seemed tedious.

I read about the MAX7219 chip, which lets you drive up to 8 digits over SPI, and it seemed to be just what I was looking for.