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.
With this circuit it is possible to compare the gain of transistors to obtain a matched pair (of...
This circuit was found in an English magazine from 1978, but it can be easily assembled today,...
This circuit is from the Philips manual of 1990. The integrated circuit is not very common. The...