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 can generate signals from 2 to 15 MHz or 4 to 22 MHz depending on the used components...
This circuit has the function of observing the characteristic curve of a transistor on the...
This narrow pulse generator is suggested by Texas Instruments using a Diac. The space mark ratio...