This circuit was originally intended to operate with a solar source for experiments. Transistors are general purpose, and the output current is relatively low.
Found in a 90s EDN, this circuit is indicated for power control through a 4-20 mA line. The...
In the figure we have an improved method of varying the voltage of a 7812 regulator. The circuit is...
This circuit was found in an Electronic Engineering of the 80s. The circuit indicates when a...