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.
Found in a 90s Silicon Chip documentation, this circuit provides a current of 3 A and the voltages...
This circuit can either generate signals in the astable form or be synchronized externally,...
Found in a Hands On Electronics of the 80s, this circuit makes use of a gas sensor of the time....