This simple neon lamp oscillator produces a 140 Hz, 40 V peak-to-peak signal. The frequency is given by the capacitor that can have its value changed. Note the high supply voltage.
In the figure we have the way to use power transistors as rectifiers in a source, replacing common...
This is the conventional protection system for a low resistance analog instrument (millameter or...
This circuit uses one of the first comercial transistor and is from a 1958’s magazine. Tone...