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.
This circuit from a 1968 Motorola documentation provides a 120 AC output with 60 Hz from a 48 V DC...
This circuit was found in a National Semiconductor manual from the 1970s, appearing in articles and on...
The circuit presented uses two common transistors and is powered by the circuit being tested. The...