This circuit was found in the January 1980 issue of Radio Electronics magazine. It is a digital slot machine using common logic circuits. It can still be easily assembled today.
This small regulator was found in a Motorola 1968’s documentation. It is a current regulator using...
This circuit was found in a 1968 US publication. Transistors used are uncommon today. The circuit...
This electronic bait, or fish attractor, produces a sound in the water that attracts fish of...