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USB GPS

Page history last edited by MrTundraMan 11 years, 4 months ago

ATMega32U4 based GPS

Features

MT3339 GPS - Capable of logging up to 16 hours at 32 seconds per log entry
ATMega32U4, 8-bit Microprocessor

Built-in USB interface

Doesn't require FTDI friend or other USB to TTL interface
Mini-USB-B jack
(Information about USB connectors)
Used for battery charging and Host Communication

Li-Polymer battery charger

Charges from USB
JST connector for direct battery connection

Compatible with Li-Poly Batteries

Extended voltage operation from 4.2V down to 3.0V of Li-Poly batteries
Works with Adafruit 1300 mA-hr Li-Poly battery

Battery form factor of battery is 1.35" x 2.55" x 0.23"

Works with Sparkfun 850 mA-hr battery

Form factor of 1.16" x 1.9" x 0.23"

Measured 35 mA current draw allows for 36+ hr battery life with 1300 ma-hr battery or 24+ hours with the 850 ma-hr battery

Well beyond the 32 hour log time of the GPS (in 15 second mode)
Battery life could be extended while logging by putting the AVR into sleep mode (20-25 mA for GPS only)

Very Small form factor

1.79x1.27 inch

Revision X1 Notes

Revision X2 Notes

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