I need someone to explain this to me.

SMS tracking with a GPS GSM enabled AVR


[Alex] sent in some of his latest work. He interfaced some not so cheap components to give an AVR GPS and GSM I/O. For now it can read the GPS position and send text messages. Thanks to the GPS/GSM module, the schematic is pretty simple – anyone with basic soldering skills and a desire to put a dent in their credit card can probably build this. (Programming the AVR is probably the most difficult task)