This circuit is from a 1967 publication and applies to incandescent lamps up to 600 W. Triacs must be fitted with heat sinks.
This oscillator that generates signals below the audible range (sub audio or infrasound) was found...
This circuit was found in a 1971s English magazine. We can still assemble it using BC548...
We found this circuit in a 1988 documentation. It is a protective system that automatically shuts...