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.
This circuit uses sensors to determine who is the first to cross the end line. The circuit was...
When the lights turns off this circuit will produce a sound like a cricket. When the lights are...
This tunable circuit was found in the May 1994 issue of Electronics Now magazine. The circuit has...