On Wed, 29 Apr 1998 07:24:56 -0300, you wrote:

>Hi guys,
>
>    A few days ago I saw some messages about people using PICs to control
>GPS receivers. I'm interested in exchange some ideas about the possibility
>of building a (home-brew) GPS receiver of my own.
>
>    If anyone can help me, please e-mail me privately. BTW, I'm electronic
>engineer with signal processing MSc degree, so don't get worried about being
>too complex!
SGS-Thomson has just announced a 2-chip GPS chipset which integrates
almost all of a GPS receiver. 
For a home-brew system, I'm sure it would be far  cheaper and easier
to buy  a commercial unit, maybe modifying it for your needs - you can
get GPSs for about UKP100 retail & I doubt you could build a 1-off for
anything close to that, certainly the actual low-level positioning
software is very complex, and I doubt it could be done without access
to a GPS simulator (or mobile workshop?!) 
If you want to customise & build-in GPS to some other system, I think
OEM GPS modules are about UKP100-150 in low volumes.
I'm sure home-brewing a GPS would be very interesting & challenging
but why re-invent the wheel?
     ____                                                           ____
   _/ L_/  Mike Harrison / White Wing Logic / wwl@netcomuk.co.uk  _/ L_/
 _/ W_/  Hardware & Software design / PCB Design / Consultancy  _/ W_/
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