Engineer does a complete breakdown of the classic NES controller and explains how it works. Awesome stuff

You’ve probably earned more than a few blisters on the NES controller, but what’s going on inside? How does it manage to communicate the state of 8 buttons using only 7 pins on the plug? In this episode we open up the NES controller to learn about the CD4021 chip and how sometime more complex can be better in a design.