wiki/ countdownclock

Count Down Clock

NASA has one. So should we.

Design

Wants

Is this overkill? :)

Part Options

These are more expensive than I was hoping. The sparkfun ones might be the best deal though. Still easier than making them.

Cost

Part Number Cost [USD] Total
7seg 6 ??? ?
Some LEDs (colons) 4ish 1.00 ?
LED Drivers ? ? ?
Power MOSFETs ? cheap ?
USB driver 1 ? ?
μc 1 ? ?
Board 1 ? ?

Board layout