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.
We found this circuit in Radio Electronics Special Projects from 1992. The circuit turns on the...
This circuit acts on a relay disconnecting the load when the input voltage exceeds the set limit....
This experimental short-range transmitter came out in a 1972 publication and was designed to...