This circuit for cars with mechanical ignition systems was found in the Electronics Experimenter handbook from 1991. It inhibits the ignition system, preventing theft.
This electronic soldering gun circuit was found in the December 1998 Electronics Now magazine. The article...
This circuit uses only passive components and must be tuned to the operating range. The circuit is...
This is a very simple configuration with a power transistor to control a DC motor from 3 to 12 V...