This circuit was found in a RE Experimenter Handbook from the 90's. The components are of the time, rare nowadays, except the 555 and 4017.
January 2017 - Mouser Electronics already has to supply the INA240 evaluation modules for current...
Greater simplicity for a radio receiver than that achieved by the author of this project found in a...
This power control with SCR was found in Radio Electronics from April 1966. The components are...