Build your own clock

If you aren't satisfied with the current crop of chess clocks, you can always build your own. Using some inexpensive electronics, plus a set of instructions found here, you can make your own. They even supply pre-built clocks, which still gives you the ability to write your own control code.
While electronic clocks are now quite common place, the one piece of code I would be interested in adding/testing, is the ability to set a time via a wifi/bluetooth interface, cutting down on the time required to reset clocks at the start of each round!