We found this circuit for immobilizing a car's ignition system in the December 1976 Radio Electronics magazine. The circuit uses the courtesy light activation switches.
Although indicated in the original publication of the 1980s as a capacitance switch, the circuit...
This is a circuit found in a 1970's Radio Electronics. The circuit works with virtually any triac...
This circuit, found in an old 1967 publication, cuts the current from a source when the current...