Found in American documentation from the 90's, this circuit can be implemented with modern equivalent components. Observe the symmetrical power supply.
We find this circuit in documentation from the 1980s. The triac and diac are of conventional types...
Found in a 90s Popular Electronics, this circuit uses general-purpose transistors, serving to...
This control for 1200 W of power was found in the documentation of General Electric of 1966 has a...