The Project Electronic Voting System is an interesting project which uses ATMEGA8 microcontroller as its brain. The project is designed for four contestants. Voters can poll their vote to any one of the contestant. The ATMEGA8 microcontroller contains I/O ports of each digital pin. In this project four pins are dedicated for micro switches for four contestants, master switch for polling officer or can say for voter authentication. A simple yet powerful program is written in embedded C language and burned into the microcontroller to accept votes and to count total votes polled. Polling officer switch (master) is provided to avoid multiple polling of single voter. Every voter should get approval from the polling officer. If the polling officer issues approval with his control switch, then only a voter can poll his vote. This issuance of approval is indicated by a long buzzer beep. Vote counts are stored in EEPROM and display the total number of vote’s polled and individual contestant-vise votes polled. A buzzer is provided for audio effect of switch bounce. Whenever a switch is bounced, the system acknowledges the bounce by a short beep sound. This buzzer is driven by an ULN2003 IC. Multiple polling by a single voter is not possible.
This project uses regulated 5V, 500mA 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 230/12V step down transformer.
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