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 can generate time base signals from 5 to 1500 Hz. We find it in a documentation about old neon...
This circuit is from General Electric documentation from 1965. The SCR and unijunction transistor may be...
This circuit is from a 90's documentation. The circuit is simple, as it uses only two transistors, and the...