I am working on a car security system based on GSM project, i still searching for the appropriate kind of sensor to use in the car which satisfy two conditions
1- Anti-Theft -----------> Door and glass sensors
2- Anti-Hijacking -------> certain kind of sensor ????
Also i want to make a remote safe shutdown of the car's engine when the car is hi-jacked.
there are seveeral ways to do things
you can put electronic switches on the door and window this is the simplest way.
or you can even put infrared tx and rx.
you can use shock tilt or capacitive sensor.
what is the output?
1) stop egnition
2) add a tracker
3) alarm?
you have first to decide how you r system will work, the sensors, output
so that to start the design