There are many places in this world with bad electricity power supply conditions, many people are still experiencing constant surges and sags in voltage. Voltage Fluctuation is one of the main cause to the damage of home appliances. Every appliance has a certain input voltage range, if the input voltage drops below or surges higher that this range, it caused a definitely damage in the electricity. In some cases, the appliances just stop working. The Automatic Voltage Regulator is designed to solve such problems, it is designed to have a generally wider input voltage range than normally electrical appliances, and it boost up or suppress the input low and high voltage to the acceptable range.