This circuit is intended for detecting 3 levels power grid voltage, and it can be adapted to operate with the most diverse voltages. The circuit uses neon indicator lamps.
This circuit was found in an Electronics Now of 1988. The circuit is still current, and the power...
This circuit, in addition to transforming a sinusoidal signal into a square, shifts its phase. The...
To operate with high input voltages using a 3-terminal voltage regulator like the LM340-15, we can...