This circuit is from a 1967 publication and applies to incandescent lamps up to 600 W. Triacs must be fitted with heat sinks.
This circuit employs an old germanium transistor. The circuit is from a 1950s publication and uses...
We found this circuit in an English documentation from the 80's. Transistors can be modern...
This circuit is from 1999 documentation. The integrated circuit used is not very common today. Both...