VENSOFT Technologies www.ieeedeveloperslabs.in Email: [email protected] Contact: 9448847874 VENSOFT Technologies www.ieeedeveloperslabs.in Email: [email protected] Contact: 9448847874 SAFETY OF VALUABLE ITEMS USING ZIGBEE AND MEMS SENSOR ABSTRACT: The main objective of this project is to develop an embedded system based anti theft alarm based on MEMS sensor and zigbee technology. This project is implemented on an avr based Atmega16 developed board interfaced with MEMS, Buzzer and LCD for display purpose. Micro electromechanical systems (MEMS) is the technology of the very small, and merges at the nano-scale into nano- electromechanical systems (NEMS) and nanotechnology. MEMS are also referred to as micro-machines or Micro Systems Technology - MST. MEMS are made up of components between 1 to 100 micrometers in size and MEMS devices generally range in size from 20 micrometers 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. Due to MEMS large surface area to volume ratio, surface effects such as electrostatics and wetting dominate volume effects such as inertia or thermal mass. This property is used to detect any motion or change in acceleration due to gravity or simply called G force. The system needs to be secured and at the same time, should be protective for valuable items such that no body can try to theft our valuable items. The present project deals with designing an activation system for the protection of valuable items by checking the change in G force. If motion or change is detected the protection system is activated. The system uses a compact circuitry build around flash version of amega16 micro controller with a non volatile memory Programs are developed andcompiled using avr studoi4 tool. Isp is used to dump the code into micro controller. This project uses regulated 5v, 750ma power supply. 7805 three terminal voltage regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac output of secondary of 230/18v step down transformer.