Re: GPS clock for Linux

"Richard B. Gilbert" <rgilbert88@xxxxxxxxxxx> writes:

Terje Mathisen wrote:
Richard B. Gilbert wrote:
Hal Murray wrote:
The Garmin GPS 18 LVC is popular. "Some assembly required."
(aka soldering) No big deal if somebody has a soldering iron
handy. There are a couple of links from here:
http://support.ntp.org/bin/view/Support/InexpensiveOemGps

You will need a 5VDC power supply and a DB-9 or DB-25 connector that
will connect to a serial or parallel port. The serial port DCD line
is frequently used. Also some hookup wire, solder, and perhaps other
goodies.

Using a USB port for the +5V line is the canonical solution: Very cheap,
dependable, and no extra wall warts.

Terje


I have read claims here that the high and unpredictable latencies in USB
render it useless for time keeping!

Yes. That is why you ONLY use it for the 5V. The usb output is +5V, Signal
+, Signal -, Power ground. Ignore the signal lines and just use the +5V and
ground to power your Garmin GPS.

.

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