The JK flip-flop can be used to count in binary! 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 (Jameco, Digikey, Mouser, etc). Complete parts list (everything in this video): - 4x 74LS76 (Dual master-slave JK flip-flops) - 4x LEDs - 22 gauge wire - 5 volt power source (e.g., a USB phone charger) - Clock circuit from https://youtu.be/kRlSFm519Bo