The presented circuit uses an opto-SCR. We found the circuit in the GE semiconductor manual. Equivalent triacs, depending on the load current and voltage, can be used.
Hig stability is the main feature of the 10 V regulator circuit shown in the figure and suggested by...
Suggested by Sprague in the 1980s documentation, this circuit can control three-phase AC motors....
This circuit uses a 709 operational amplifier that is no longer common today. However, the same...