The sensor of this circuit is a photodiode. Equivalent operations can be used, and the instrument can be replaced by the lower current range of a standard multimeter.
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...