This project teaches us a way on how to protect our vehicle and it seems that a steering wheel lock and an engine kill switch with a good hood lock seems to do the job. Some of many electrical ways to stop a car from starting and to kill switch is one of these systems and to interrupt its operation.

The hardware of this uses Econotags that features the MC13224V wireless microcontroller which is capable ARM7 based CPU that is easy to use and fully supported by the Contiki Operating System. While the Econotag has flexible power supply options wherein the server powers the Econotag from its external regulated input.

The input is connected to the car battery through a standard automotive fuse and been modified slightly to fit in a plastic project box on hand. And the USB connector was removed and half of a regular USB cable was pigtailed into the USB connector via on the Econotag.

The firmware running on both the kill switch and the fob is the Contiki OS that provides some great embedded OS features such as event based programming and concurrency.       Link to project