[Steve Cholewiak] sent in his diy GPS data logger. It uses an old DeLorme tripmate – these were serial gps units that ran off of internal batteries. A PIC controller reads the NMEA sentences ...

HOBO launches industry's first self-contained water level logger with Bluetooth for fast, wireless data offload. Designed for both freshwater and saltwater environments, the HOBO MX20L logger is ...

He has built the basic GPS data logger using an accelerometer, a GPS unit, and a BS2P microcontroller. The overall weight is 62 grams and it can record for the whole 5 minute flight. At roughly $ ...