Rumble filter (CB6541E)

This turntable filter was found on an 80's Elektor. The circuit makes use of operational features that are easily obtainable today.

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Linear photometer (CB20721E)
Found in American documentation from the 1970s, this circuit employs an integrated circuit from...
Flashlight Remote Control (CB10851E)
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
Simple anemometer (CB23571E)
This assembly circuit using a small motor as a generator was found in Radio Electroics magazine from...