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.
Found in an EDN from the 90s, this regulator makes use of the integrated circuit of the time. The...
The transistors in the presented circuit can be the BC548 and the filter in front of the...
Found in the April 1995 issue of Electronics Now, this circuit operates at a lower frequency than...