Finished Building my GPS, now some ?s for the GPS gurus
Well, after weeks of procrastination i finally decided to build the GPS that i was planning. Someone had given me a Trimble Lassen LP GPS Module, and i have wired it to a MAX232 chip to make a Serial GPS (3.3v & 5v power taken from my PSU, saves having 2 voltage regs).
So anyway, i finally finished it last night. Here are the pics before i jammed everything into a jiffy box which fits inside my PC case:
Powering it up, i was extatic to find it worked first time. Data streaming from the GPS visible in Hyperterm. Destinator 3 also found the GPS as NMEA 4800 baud... But here is the problem, it wouldnt lock any satellites. Last night it would give me my location, and even traced my driving (holding the antenna out the sunroof), but it didnt show any satellites locked.
Today i cant get any location info. Is the antenna too weak? Is it possible to get location info without 'locking' onto a satellite? Anyone know?