This circuit was found in a 1967 General Electric manual. It shows a SCR control with unijunction and zener diode. The triac depends on the controlled load.
This circuit was found in a Radio Electronics issue from May 1989. Please note that it may not...
The circuit in the figure is very interesting because it simulates an SCR triggered by light. When...
The circuit shown is a suggestion by National Semiconductor in its 1994 Linear Applications...