This immobilizer circuit for the car was found in the Radio Electronics magazine of December 1976. It has several sensors blocking the ignition system.
This circuit, obtained in an old publication, causes a second telephone bell to be played in a...
This circuit is from the 1982 SGS Linear Circuits Manual. The circuit provides currents from 35 mA...
This circuit generates pulses of up to 60 seconds with a short reset time. The circuit is from an...