[time-nuts] GPS Valid Fix Detector

[Peter Putnam]

Greetings,

For those interested in a very simple means of determining if the NMEA
data stream from a GPS receiver contains valid fix data, I offer
design details for a "Valid Fix" detector that runs in a Microchip
12F629, an 8-pin DIP device.

No other components are required if the GPS receiver provides CMOS 
output levels:

http://www.ni6e.com/time/GPS_Valid_Fix.html

Regards,
Peter