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18 channel GPS module, model GSU-36 manufactured by Position Ltd in 2001, removed from working equipment. The pinouts, left to right with the PCB facing downwards, are as follows:
1: Gnd, 2: Batt (+ 3.3 volts), 3: 10kHz output, 4: 1PPS output, 5: RO2, 6: TX Data, 7: RX Data, 8: VCC (+ 3.3 volts), 9: VCC (+ 3.3 volts)
These devices output standard NMEA strings serially at 4800 baud, which can decoded by most microcontrollers using commonly available code or a PC with an RS232 level shifter. The series of strings output by the device looks like this when read from Hyperterminal on a PC.
$GPGSA,A,1,14,18,22,,,,,,,,,,,,*12
$GPGSV,1,1,03,14,57,296,15,18,57,116,10,22,83,004,16,,,,*40
$GPGGA,171840,3905.153,N,07950.130,W,0,00,099,00000,M,0025,M,,*42
$GPGLL,3905.15,N,07950.13,W*7B
$GPRMC,171840,V,3905.153,N,07950.130,W,000.0,000.0,180509,,*17
$GPZDA,171841,18,05,2009,,*45
$PKODA,H,099.9,00,00,00,00,00,00,00,00,0000,M,000.0,N,000.0,000.0,3,0
$PKODG,1,0,14,+57,296,10,03,10,07,03,00,18,05,09
$PKODG,7,2,0,100
The device also has a 1 pulse-per-second output, which makes it easy to incorporate the module into a Nixie clock for high accuracy timekeeping.
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