This immobilizer circuit for the car was found in the Radio Electronics magazine of December 1976. It has several sensors blocking the ignition system.
The Buck-type DC-DC converter (voltage lowerer) shown in figure 11 is suggested by Analog Devices...
This circuit can be used to directly control direct current loads or higher alternating current loads...
This circuit can turn-on (only) a load (relay or lamp) when S1 is pressed. The circuit can be used as...