Garmin v1.0b manual How To Connect The GPS, Gps

How To Connect The GPS

Furious activity is no substitute for understanding. -H. H. Williams

These instructions assume that you are adding the GPS upgrade to a completed IN-14 nixie clock kit purchased through tubeclock.com. If you are adding the upgrade at the same time as building the kit, you will not need to remove the standard parts. Simply substitute the parts that came with the GPS upgrade kit instead. If you purchased a completed IN-14 nixie clock, you may use these instructions to upgrade the clock yourself.

1)To provide sufficient current for the GPS unit, resistor R1 will need to be replaced. This resistor was a ½ Watt 1k Ohm part, located on the right hand side of the PCB. Remove R1 and replace it with the 1 Watt, 100 Ohm part provided.

2)There are six wires which lead to the GPS-18. Each of these wires connects to a solder pad on the Nixie Clock circuit board. Snip off the connector provided on the GPS-18, strip the wire ends, and solder them to the pads on the clock PCB as listed in the table below.

GPS

18

Pin #

Color

Signal Name

Wire

Gauge

Connection Point on

Clock

1	Yellow	Pulse Per Second Output	28	RA0
2	Red	Vin – 5V Power In	26	5V_A
3	Black	Ground	28	GND_A
4	White	GPS Serial Transmit	28	RC1
5	Black	Ground	26	GND_A
6	Green	GPS Serial Receive	28	RC0

Yellow	Black (two wires)			Replace R1
			with	100Ohm 1W
Green
White
	Red	Replace Microcontroller