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.
The circuit shown was found in a 1994 Linear Applications Handbook by National Semiconductor. The...
We found this circuit in documentation from the 1970s; The circuit uses Japanese transistors of...
This traditional crystal oscillator configuration with FET was found in the 1994 Linear...