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.
The integrated circuits used in this oscillator are not very common today, as we obtained it in...
This circuit was found in a 1967 Electronics World. Transistor Q1 can be a TIP321 and Q2 can be a...
This circuit is from a 1980s documentation featuring two time constants for sound decoding. The...