Our computer's clock is built using several 555 timers. The first is configured as an astable oscillator. See https://eater.net/bbcpu8-clock-module for more. Part 2: https://www.youtube.com/watch?v=81BgFhm2vz8 Part 3: https://www.youtube.com/watch?v=WCwJNnx36Rk Part 4: https://www.youtube.com/watch?v=SmQ5K7UQPMM Support me on Patreon: https://www.patreon.com/beneater You can get all the components used in this video from any online electronic components distributor for a few dollars. Complete parts list (everything in this video): 1x 555 timer IC 1x 1MΩ potentiometer 2x 1kΩ resistors 1x 100kΩ resistor 1x 330Ω resistor 1x 2µF capacitor 1x 0.1µF capacitor 1x 0.01µF capacitor 1x LED Solderless breadboard 22 gauge wire USB charger and cable or some other 5v power source