very cheap GPS
December 8, 2010
I posted this as a comment on the cheap FTDI cable idea and it occurs to me that a lot of folks who might be interested will miss it there...
My cheap suggestion costs 4 times as much, but includes a free GPS. Currently (Dec 2010) there is a vendor on Amazon selling the Pharos GPS-500 with Microsoft branding (was packaged with Streets) for $19 delivered, including the USB adapter and a USB extension cord. It will come in a plastic case that says Microsoft on it. Carefully crack that open to expose the GPS. Lay it chip down with the connector toward you. The 2nd lead from the left is for 3.3v or 5v (I have had success with both), followed by GND, GPS Tx and GND. Wire those 4 and it will start spewing NMEA strings at 4800 baud. I am pretty sure that GPS Rx is 1st lead on the left. I don't know that it listens for commands, but that would be important if you want to use the USB adapter that came with it to make an FTDI cable. Just match up which would connect to what using the GPS pinouts and you are good to go!
Another poster on that project thread noted that using adapters that make power providing serial cables is not the same as true FTDI.