[ntp:questions] Garmin GPS 18LVC Setup but questions on best way

David J Taylor david-taylor at blueyonder.neither-this-part.nor-this-bit.co.uk
Tue Dec 30 17:18:50 UTC 2008


Unruh wrote:
[]
> The other problem is that the the voltage levels might be wrong. A
> serial
> port is supposed to be -12V to 12V, not the 0-5V that the PPS line on
> the garmin delivers.   Now some serial ports are OK with the 0-5V but
> that is pretty
> unusual. YOu either need a voltage converter, or you need to use the
> parallel port instead, which takes 0-5V.

You are technically correct, but I haven't found a serial port yet which 
doesn't work correctly when fed with 0..5V.

Cheers,
David 




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