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.
Based on an Analog Devices LTC1540, this circuit consumes only 50 uA, serving to monitor the...
This circuit was found in a 1965 General Electric publication. The circuit can be adapted to...
This is the power supply circuit for the amplifier in the previous circuit. The source is...