Guitar Distorsion Pedal (CB18205E)

This simple circuit with two transistors was found in a 1985 publication. The power can come from batteries or battery, as consumption is very low.

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SCR Power Control (CB4678E)
This is a slightly different configuration of full-wave power control than we found in an old...
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This 1-transistor timer was published in Radio Electronics magazine in December 1960. The circuit has...
Automatic speed regulator for DC motors (CB23722E)
This type of circuit is widely used in old cassette recorders and tape players, regulating the...