[time-nuts] If there a FAQ

[Hal Murray]

albertson.chris at gmail.com said:
> What low cost GPSes should I look at?

These days, most low cost GPS units are USB, but those don't have a PPS 
signal.

You may be able to find the PPS signal on the module in there if you take it 
apart.

These are the only low cost ones I know of with PPS.  Both require chopping 
off the connector they ship with and wiring up to an RS-232 connector and 
providing power.

Garmin GPS 18x LVC:
  https://buy.garmin.com/shop/shop.do?pID=27594
  http://www.provantage.com/garmin-010-00321-36~7GRMO006.htm
Garmin has 3 versions of the GPS 18x.  Be sure to get the LVC.

GlobalSat MR-350:
  http://www.usglobalsat.com/p-58-mr-350p-bulkhead.aspx

If you find any more inexpensive ones with PPS, please let me know.


Those are hockey-puck, or mouse units, a clean package with a 15 ft cord.

You can also find bare modules.  Some of them require an antenna.  Some have an antenna built in.  Here are some examples.  Google will probably find many more.
  http://www.sparkfun.com/categories/4
  http://www.sparkfun.com/tutorials/127

Some of the older modules have a 10 KHz output.  That makes building an analog PLL reasonable.  Google for Jupiter.




-- 
These are my opinions, not necessarily my employer's.  I hate spam.