Vehicle Theft Intimation to the Owner on His Cell Phone by GSM


Uploaded on May 03, 2012 by Efxkits

Model No: PIC 106 The main scope of this project is to stop the engine of an automobile automatically when the microcontroller sends an alert message to authorized owner. The project includes a GSM modem, microcontroller, relay, voltage regulator and the 12V battery to power up this module. When someone tries to steal the car then microcontroller gets an interrupt and orders GSM Modem to send the sms, the owner receives a SMS that his car is being stolen then the owner sends back the SMS to the GSM modem saying ‘stop engine’, vehicle will be stopped and in turn message will be relayed through GSM Modem. The control instruction is given to the microcontroller through interface, the output from which activates a relay driver to trip the relay that disconnects the ignition of the automobile resulting in stopping the vehicle.

The power supply consists of a step down transformer 230/12V, which steps down the voltage to 12V AC. This is converted to DC using a Bridge rectifier. The ripples are removed using a capacitive filter and it is then regulated to +5V using a voltage regulator 7805 which is required for the operation of the microcontroller and other components. For more details visit or

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