It should take just a few minutes to complete this crude GPS tracker. It is made out of FRS or PMR446 two-way radios and a Garmin GPS receiver. You could probably use any other GPS receiver and the range of this tracker is around 2-3km - depending on the two-way radios range.
What's interesting to me is that this configuration actually does work: RS232 output from Garmin is connected to microphone input of one radio with only two wires. At the other (receiver) side, instead of a speaker, a wire with a COM port connector is soldered and connected to PC with Google Earth and Earth Bridge installed.
It is a very simple hack that works but I would really like to see some opto-isolators here.
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