Designing Gps devices

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Mahammad

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Hi , i want to build a simple gps device .no matter what may be its area .plz help me
 

what do you mean by GPS device ? a simple GPS receiver ?? please explain more
 

What exactly you mean? You want to make a GPS receiver?!!
OR
A GPS module based project?

---------- Post added at 23:16 ---------- Previous post was at 22:58 ----------

If I am right, a GPS device is something much much complicated and it is not so easy to make it.
But it is easy to use a GPS module since what we need to do is just to read the GPS data from the GPS module using a microcontroller via a serial interface.

---------- Post added at 23:18 ---------- Previous post was at 23:16 ----------

just read this post and see how difficult it is:
Build a GPS receiver?
 
Hi,

Here are a few examples of interesting GPS projects:

Ice Tube Clock

**broken link removed**



**broken link removed**

**broken link removed**

Interfacing an AVR controller to a GPS Mobile Phone

They should give you some ideas. I've seen GPS Modules for as little as $30 here, but depending on the options they can quickly increase in price.

BigDog

---------- Post added at 23:50 ---------- Previous post was at 23:47 ----------

The connection between MCU and GPS are usually asynchronous serial or RS-232.

For most people the hardest part of the project is designing a parser for the GPS NMEA sentences.

There are however several open source NMEA parsers available in C source code.
 
I want to design a gps receives that shows my position .i need not be very accurate .my position may differ by around 20 miter
 

Do you need portability, otherwise a GPS with a RS-232 will provide a location using a number of free PC GUI applications.

Otherwise a simple MCU with LCD readout and battery will provide the information you want in a portable configuration.

BigDog
 

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