This circuit, obtained from a 1965 magazine, can still be assembled using some modern equivalent components. The transistors may be BC558 and the transformer is obtained from a disused transistor radio.
This circuit uses an unusual Motorola integrated. The circuit is from Motorola's 1990 Linear...
This circuit was found in a September 1987 Radio Electronics. The current through the switch is...
The circuit shown in the figure triples the alternating voltage providing a continuous output...