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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Complex Sound Generator (CB21237E)
Using LM3909 integrated circuits, this circuit was found in an American documentation from the...
8bit Digital to Analog Converter (CB5169E)
This circuit was found in an ancient American documentation. The components of the time are not...
Bootstrapped Emitter Follower Stage (CB25619E)
This circuit with low impedance output and 900k input impedance was found in the October 1993...