This circuit can be used to obtain a zener voltage from a common zener of another value, adjusting in a multimeter. The circuit is from an American documentation of the 1970s.
We found this circuit in the Radio Electronics magazine of May 1977. The circuit has the frequency...
This circuit is an improvement over the previous one, using the same capacitor system as a sensor....
This transmitter outputs signals to the analog TV range operating with composite video signals for analog...