Here’s a neat AVR – GPS – cell phone tracker project…

This project is about GPS tracing. it works as follows:
- GPS traces the position of the device via satelite
- Somebody (who wants to know the position) calls the number of the GSM-Module
- The Microcontroller noticed the call and ask the position which is stored in a global var
- The Microcontroller sends a command to the GSM-Module to send a SMS with position information back to the caller.

GPS-TRACE – Link.