: In this modernized world each & every industries contains a large machines, equipments, computers, communication equipments, process controllers, etc. To get the desired output this system should be stable. In large industries the small variation in input voltage can cause heavy loss which is very dangerous to operators and machinery & also results in heavy financial loss. May types of voltage stabilizers are available in market. In these stabilizers the output is changed manually with switch to maintain output voltage constant. But during peak period this manual operation of stabilizer has to be done frequently. This paper presents low cost servo controlled voltage stabilizer which rectifies the problem
