Posted by Circuits Arena on Saturday, 17 January 2015
Electronic Vehicle Immobilizer Project is the artlcle explaining Electronic Vehicle Immobilizer : This simple vehicle immobilizer circuit is affordable, straightforward to form, install and operate. It’...
Electronic Vehicle Immobilizer :
This simple vehicle immobilizer circuit is affordable, straightforward to form, install and operate. It’s conjointly terribly discreet.
Thoroughly field tested, it’s strong and weather resistant style will forestall vehicle thievery notwithstanding the criminal has the keys.
In it’s commonest application, it prevents the engine from turning over till the vehicles ‘G-Spot‘ is touched at identical time the key's turned to the ‘Start’ position, and therefore the operator is earthed.
Schematic and Circuit Description:
Turning the vehicles key supplys power (red).
The SCR prevents operation of the load till the voltage on the bottom of the PNP junction transistor is lowered by the earthed owner contacting the G-Spot (green),
This turns the junction transistor on and current then flows through the collector circuit and 220 ohm electrical device (orange), triggering the gate of the SCR.
Once triggered, the SCR permits power to flow to load (green) and remains on till power is isolated.
