Build An LED Propeller Clock My "Propeller Clock" is a mechanically scanned LED clock with seven light emitting diodes that spin, giving the illusion of numbers floating in the air. This is the first clock I ever built. I've built a few LED signs, but they get boring because I already know the message.
This clock utilizes only a few relatively inexpensive electronic components and a recycled motor from a VCR or floppy drive. The Propeller Clock (Bundle) Parts List