Abstract: The aim of the project is to make a low voltage and high voltage indicator. The system will save costly electrical and electronic appliances from the adverse effects of very high and very low mains voltages. A project has been proposed on simulating a overvoltage and under-voltage protector, with the hardware. The advantages of our project are -Wide single supply voltage range 2.0 V DC to 36 V DC ,Very low supply current drain (0.8mA) independent of supply voltage , low input biasing current 25mA.,Input common mode voltage range includes ground, differential input voltage range equal to the power supply voltage.
Keywords: Power Quality, Overvoltage, Undervoltage.