This configuration can be found in several articles on this site. The one shown in the diagram is from the datasheet of the LM101 series amplifiers, but it can be implemented with other types.
This control is intended for 110 VAC or 220 VAC Motors. Any TIC series triac can be used according the power...
This 1965 General Electric circuit uses a "Thyrector" that is a suppressor of the time. The...
The S-meter is a signal strength meter used in communication receivers. This circuit was found in...