Touch Switch (CB6449E)

This resistive sensor was found in a 1969 US documentation. The circuit uses transistors of the time, but current equivalents can be employed.

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RF Oscillator LM3909 (CB15924E)
The main feature of this RF oscillator that operates in the range of 100 to 800 kHz is its low...
Noise Generator with the 741 (CB12176E)
This traditional configuration of a white noise generator that uses the junction of a transistor with a...
10 W amplifier (CB17053E)
This excellent amplifier has already been presented in other configurations on this website. It is...