The figure shows a typical circuit of a variac with a special transformer with sliding adjustment of the winding turns. The circuit is from an Electronics Now magazine from December 1997.
Using a CA3130, we found this circuit in an English publication from 1977. The circuit must use a...
We found this circuit in an American documentation from the 90s. The consumption is only 1 uA in...
This 1967 Electronics World circuit is suitable for frequencies up to 1 MHz. The setting applies...