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Electronic Voting Machine projects

Now a days EVM are being used effectively. The confidence of the voter in its flawless working is gradually building up and these machines are thus becom ing quite popular throughout the coun try. Features of the elec tronic voting machines include avoidance of invalid votes and reduction of counting time and the consequent expenditure in curred on manpower deployment.

Hardware description

The voting machine circuit being described here is designed around Intel's basic 8085 microprocessor.
 It has two main units:

(i) control and processing unit, and
(ii) keyboard and display unit.

Keyboard and display are interfaced through a general-purpose programmable peripheral interface (PPD IC 8255. The system monitor programs are stored in 2732 EPROM. RAM 6116 is used for stor ing counts and a portion of it is also used as stack. IC 74L8373 (octal D-type latch) is used for segregating the lower order address bits from multiplexed address data bus of 8085. Two of the higher order bits are decoded by 74LS138 to generate chip select signals for IC4 through IC6. 

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1 comment:

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