PCB
$git/PCB contains the board PCB built with eagle:
eagle gps-logger/PCB/PCB.sch &Board to control the GPS module with an MSP430 and two push buttons.
Power consumption:
the GPS receivers draws about 20 mA, and the MSP430 about 1 µA most of the time (LPM3 hibernation mode) so the estimated overall consumption is 20 mA. With generic 900 mAh batteries I can theoretically keep it running for 45 hours.