The circuit is from Ferranti's 1974 transistor manual. Transistors are general purpose types, and the output waveform is rectangular. Components can be changed to other frequencies.
This simple voltage doubler provides a continuous voltage at its output that is twice the peak...
This circuit was obtained in an old Elektor and can be adapted to use white power LEDs. The...
This circuit was obtained in an Argentine publication from 1973. The original version uses...