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.
This nice analog indicator circuit was found in the January 1974 issue of Radio Electronics...
The purpose of this circuit is to increase the current of a MAX1735 regulator to obtain an output...
CMOS gates such as 4001 or 4011 can be configured as inverters and used in the circuit shown where...