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 circuit is from 1994 documentation by National Semiconductor. What it does is convert the...
This circuit with the known PLL 567 can be found in other versions in this section and in this...
This sophisticated circuit of the coin-toss game was found in an American 1980s documentation. The circuit...