Make 1015
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.