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 configuration of a transistor as a temperature sensor. The circuit is...
We found this circuit in a 1977 National Semiconductor Databook. The circuit can use other FETs...
This circuit generates a control tone that serves to adjust amplifiers, check audio cables. The...