This circuit turns off when switch S1 is opened. The circuit is from the 1989 Radio Electronics Experimenter edition; The triac must be controlled according to the load.
The block shown in the figure is a basic source with a configuration widely used in technical...
Found in July 1975, Radio Electronics magazine this circuit can use any operating circuit,...
This oscillator produces an audible signal on a piezoelectric transducer. The frequency is...