This circuit turns off a relay after a time determined by C1. The circuit was found in the December 1974 Radio Electronics magazine. The relay is rated according to the supply voltage.
This game consists of a variation of the Nerve-Test with the difference that errors are indicated...
Found in a National Semiconductor manual from the 90's, this circuit uses components of the time,...
This bench power supply was found in Radio Electronics magazine from February 1962. The...