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.
This old circuit, from the 80s, was found in American documentation. The circuit uses dual gate...
The value of R1 given by I = R1 / 5 determines the load current of this circuit. The maximum...
This circuit, found in a 1994 documentation, eliminates the hiss (static noise) that occurs when...