The brains of this thing is an ESP8266 on a custom PCB which controls the 127 individually addressable RGB LEDs. The clock may look large, but the big printed parts just fit on the bed of a Prusa i3.

If you find yourself wishing for even more functionality, you might want to build something like this custom macro keyboard with built-in LED backlighting. Rather than go with a standard ...

The big draw of the Hexgears A3 Immersion is its LED display ... gaming keyboard offers unmatched connectivity, and comes ...