1-cycle-per-30-day oscillator (CB26073E)

This extremely slow circuit produces one pulse per month and can be used in a timer. We found it in the November 1998 Electronics Now magazine.

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Transistor Tester (CB23935E)
This simple transistor tester circuit was found in the February 1968 issue of Radio Electronics magazine....
40W Voltage Inverter (CB25375E)
This powerful inverter provides a high-quality sine wave signal. I found it in a Radio Electronics issue...
Silencer (CB4197E)
This squelch is activated by its own noise, acting automatically. It is used in communications...