This very high voltage generator for photographing the aura was found in the special edition of Radio Electronics Eerimenter magazine from 1990. The circuit uses a car ignition coil.
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...