Instead of going with a microcontroller he built the circuit around a 555 timer. What he really needed in this case is a flip-flop but lacking a chip for that he went with the 555 because it has ...

The Adafruit Push-button Power Switch is a tidy little design that lets you control a DC power source using an everyday tactile button. The breakout uses a latching analog circuit that is triggered by ...

This repo contains files for building a push-button control panel for Zoom. It was made using Windows short cuts, but could easily be modified for Mac instead. An ...