This circuit is from an American documentation from the 90's. The SCR can be of any type and the diodes must have current according to the controlled motor.
With this circuit, from an American documentation from 1976, it is possible to measure...
This power supply for model railroad was found in a February 1961 Radio Electronics Magazine. The...
This circuit was found in a Radio Electronics from June 1967. The regulator is suitable for power...