The circuit presented was developed to turn off the ignition of any vehicle by ringing a cell phone or landline, to avoid theft, making it possible to turn off the engine in a real theft situation. The device can be installed in any motor vehicle including motorcycles, passenger cars, etc. In the case of trucks, it is especially interesting because it avoids even theft of cargo. The system must be connected to a cell phone at the call signal output for it to work remotely. Whenever a call is made to this cell phone number, the ignition will be turned off. To turn on, there is a SET button (01) which, when pressed, will allow the vehicle to operate normally.(2006)