This circuit was found in the July 1969 Radio Electronics magazine. The circuit controls resistive loads and universal motors with power according to the SCR used.
Found in an English publication, this control is intended for 220 V mains powered motors. However, it...
This circuit was taken from the 1974 Ferranti transistor manual. Transistors are common types at...
For someone who wants to take advantage of a double transformer in a good power supply, we found...