Steam locomotive (T315E)

This 1967 modeling circuit mimics the whistle of a locomotive. The steam-shrieking wheezing is set in a 2k2 potentiometer.

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2-transistor LC oscillator (CB22388E)
This circuit was found in English documentation from the 90's. Transistors are general purpose types....
Precision Rectifier (CB24972E)
This instrumentation circuit is from the June 1986 issue of Radio Electronics magazine. Equivalent...
Audio Remote Control (CB24138E)
This is an interesting idea that we found in the May 1971 issue of Radio Electronics magazine. It can...