Sinusoidal Oscillator (CB8427E)

Found in a 90s Electronic Design, this circuit can generate sinusoidal signals from 0.1 Hz to 25 kHz with low distortion using a MA292 from Maxim.

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Capacitive Code Switch (CB10446E)
This circuit was obtained from a Radio & Electronics Constructor from March 1976. The magazine no...
Double Touch Switch (CB16980E)
This bistable touch sensor circuit uses a relay and is very sensitive. We found it in a 1990...
Simple FM tuner (CB18577E)
This FM receiver tuning step circuit was found in a 1960 documentation. No information about the...