Alternator regulator (CB7121E)

This circuit was found in Radio Electronics from the 90s. Q3 must have a heatsink and R10 fixes the output voltage.

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Weak Signal Differential Detector (CB6665E)
This circuit was obtained from a 1966 documentation. The transistors are of the time. The circuit...
3-Gate Triggered Oscillator (CB25332E)
Using 3 ports, this rectangular oscillator was found in the March 1996 issue of Electronics Now...
Potentiometer with 555 and 4066 (CB25244E)
With this circuit it is possible to vary the resistance by adjusting the mark/space reaction of...