Touch Relay (CB18273E)

With the circuit shown in the figure, it is possible to connect or disconnect a load controlled by the relay by touching the sensors X1 and X2.

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Electronic Repellent (CB16654E)
This simple oscillator is yet another of the many versions of sonic insect repellent that we find...
4 to 20 MHz XTAL Oscillator (CB12705E)
The circuit in the figure operates at frequencies from 4 to 20 MHz and also uses a common junction FET...
Decade Counter (CB24584E)
This TTL counter was found in the April 1979 issue of Radio Electronics magazine. The circuit is...