General GPS project notes

Garmin

Trimble

Lassen

Lassen SQ

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

 	Quantity  	Part Number  	Description  	Customer Reference  	Backorder Quantity  	Unit Price
USD 	Extended Price
USD
1 	4 	H2053-ND 	CONN HEADER 10POS 2MM PCB TIN 	  	0 	0.76000 	$3.04
2 	10 	P189-ND 	BATTERY LITHIUM COIN 3V 20MM 	  	0 	0.27000 	$2.70
3 	10 	BA2032-ND 	HOLDER COIN CELL CR2032 EJECT 	  	0 	0.70000 	$7.00
4 	10 	497-1442-5-ND 	IC POSITIVE REG 5V TO-220FP 	  	0 	0.64800 	$6.48
5 	10 	CP-002AH-ND 	CONN PWR JACK 2.1X5.5MM HIGH CUR 	  	0 	0.36400 	$3.64
6 	10 	CP-004A-ND 	CONN 2.1MM FEMALE PLUG 5.5MM OUT 	  	0 	0.55900 	$5.59
7 	4 	AD22105AR-ND 	IC THERMOSTATIC SWITCH SS 8-SOIC 	  	0 	3.08000 	$12.32
8 	2 	LM2597N-3.3-ND 	IC REG SIMPLE SWITCHER 8-DIP 	  	0 	3.78000 	$7.56
9 	2 	LM2597N-5.0-ND 	IC REG SIMPLE SWITCHER 8-DIP 	  	0 	3.78000 	$7.56
10 	10 	1N5817DICT-ND 	DIODE SCHOTTKY 20V 1A DO-41 	  	0 	0.30000 	$3.00
11 	2 	P151-ND 	BATT 3V LITH CAMERA - BULK PKG 	  	0 	2.63000 	$5.26