General GPS project notes

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Garmin

Trimble

Lassen

Lassen SQ

Serial TTY to RS232

Serial TTY to Bluetooth

Serial TTY to USB

PIC datalogger

Power supply

High efficiency switching voltage regulators National LM2597 3.3 and 5.0 "Simple Switcher" 8-DIP $3.78 Digikey

Requires 1N5817 Schottky diode and 100 uH inductor (M9799-ND) and the usual handful of caps.

Backup / standby power Button cell batteries - CR2032

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