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 got this circuit in a publication of 1987. This is an audio limiter, a circuit that cuts peaks...
This circuit can be used with motors or resistive loads, such as heaters and incandescent lamps....
This circuit, which in our times would be called a shield, can also be used with other loads. The...