This Keyboard Has Only 5 Keys… and It Works

I built a fully functional keyboard with just 5 keys and it actually works. In this video, I take a ridiculous idea and turn it into a real, usable keyboard powered entirely by combo keys. From early design decisions to PCB manufacturing, live assembly, debugging, and finally typing on it, this build was all about experimenting, learning, and making something weird just because it’s fun. It has zero practical use… but it looks cool, works surprisingly well, and was a blast to build. Topics covered: Combo key keyboard concepts Switch selection for multi-key presses PCB design and manufacturing Live soldering and assembly Firmware debugging and testing Typing tests on a 5-key keyboard Github (Comb03xD): github.com/lander03xD/zmk-config Twitch: twitch.tv/lander03xD Website: lander03xD.com