Micro electro mechanical systems (MEMS) (also written as micro-electro-mechanical, Micro Electro Mechanical or microelectronic and micro electromechanical systems) is the technology of very small mechanical devices driven by electricity and it merges at the nano scale into nano electro mechanical systems (NEMS) and nanotechnology. MEMS are separate and distinct from the hypothetical vision of molecular nanotechnology or molecular electronics. MEMS are made up of components between 1 to 100 micro meters in size (i.e. 0.001 to 0.1 mm) and MEMS devices generally range in size from 20 micro meters (20 millionths of a meter) to a millimeter. They usually consist of a central unit that processes data, the microprocessor and several components that interact with the outside such as micro sensors. The aim of this project is to control the home appliances by using MEMS. The MEMS will be tagged to the hand. Whenever the hand moves in a particular direction, the mechanical movement of the hand will be recognized by MEMS. Here we consider 4 directions i.e. front, back, left, right and stop. MEMS convert this mechanical hand movement into equivalent electrical signals(X, Y, Z coordinates) and send it to the microcontroller. In this project MEMS connected to ADC and it gives ADC values. We use MCP3202 as ADC and gives values to microcontroller. And the controller will also be interfaced to 2 ac loads through relays. These loads will be controlled based on the signals received by the MEMS, as per the code logic. This project uses regulated 5V, 500mA power supply. Unregulated 12V DC is used for relay. 7805 three terminal voltage regulator is used for voltage regulation. Full wave bridge rectifier is used to rectify the ac output of secondary of 230/12V step down transformer.