Link (Via Make)
With two time display options (Binary and wave-it-in-the-air POV display) and a super-bright flashlight mode, this watch is sure to turn some heads. Buy as a chip only, a kit to assemble yourself, a preassembled board, or a complete watch.
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects