8051 micro controller based Electronic Voting Machine .

1. SAHANA K 1DA14EI037
SOWMYA S 1DA14EI043
VIJAYALAKSHMI R JOGER 1DA14EI052
VIDYA BAGALI 1DA14IT410
DEPARTMENT OF ELECTRONICS AND INSTRUMENTATION
ENGINEERING
MINI PROJECT ON
ELECRONIC VOTING MACHINE
SUBMITTED BY
UNDER THE GUIDANCE OF
DR M MEENAKSHI
PROFESSOR AND HOD
DEPT . OF EI
COORDINATOR
SHRIDHAR KUMAR H R
ASSISTANT PROFESSOR
DEPT OF EI

2. CONTENTS
 INTRODUCTION
 COMPONENTS LIST
 BLOCK DIAGRAM
 CIRCUIT OPERATION
 ADVANTAGES
 DISADVANTAGES
 APPLICATIONS
 CONCLUSION
 REFERENCES

3. INTRODUCTION
 India is world’s largest democracy. Fundamental right to vote or
simply voting in elections forms the basis of Indian democracy.
 In India all earlier elections be it state elections or centre elections a
voter used to cast his/her vote to his/her favourite candidate by
putting the stamp against his/her name and then folding the ballot
paper as per a prescribed method before putting it in the Ballot box.
 Electronic voting (also known as e-voting) is a term encompassing
several different types of voting, embracing both electronic
means of casting a vote and electronic means of counting votes.

4.  No more ballot paper, ballot boxes, stamping, etc. all this condensed
into a simple box called ballot unit of the electronic voting machine.
EVM is capable of saving considerable printing stationery and
transport of large volumes of electoral material. It is easy to
transport, store, and maintain.
 Our Electronic Voting Machine is microcontroller based having
facility of storing of votes of candidates by pressing switches,
options of display in LCD the votes, total result etc.

5. COMPONENTS LIST
 8051 MICROCONTROLLER
 LCD DISPLAY
 LED
 BUZZER
 CONTROL SWITCHES
 EEPROM
 CAPACITORS
 RESISTORS
 BREAD BOARD
 POWER SUPPLY

6. BLOCK DIAGRAM

7. CIRCUIT DIAGRAM

8. PIN DIAGRAM

9. DESCRIPTION
Electronic Voting Machine basically consists of four main blocks.
These blocks are
 Keypad
 Microcontroller
 LCD Display
 Control switches

10.  Keypad: We have 4 keys on the keypad. Thus it has one key specified
for one candidate. This block is used in both voting and counting
mode, in voting mode key of respective candidate is pressed, the
corresponding signal is sensed by micro controller
 Micro controller: Micro controller senses the signal given from
switches and decides the mode of operation in voting mode it
increments the data for corresponding key i.e. respective candidate as
well as it sends signal to display block to indicate one key is pressed.

11.  LCD display : Liquid Crystal Display which is commonly known as
LCD is an Alphanumeric Display it means that it can display
Alphabets, Numbers as well as special symbols. Thus LCD is a user
friendly Display device which can be used for displaying various
messages . Here we have used 16 x 2 Alphanumeric Display which
means it can display two lines with maximum of 16 characters in one
line.
 Control switches: There are three control switches:
I. Clear Votes.
II. Controller switch.
III. Mode selection switch.

12. CIRCUIT OPERATION
 Power on: When supply is turned on RED LED glows
 Mode selection:
i. Voting mode: toggle switch on VCC
ii. Counting mode: toggle switch on GND.
i)Voting Mode: When toggle switch is in voting mode “Voting
mode” is displayed followed by “Please vote”. After a vote being
given, “Please wait for authority switch” is displayed and again
enable for voting after Control switch being pressed by the voting
Authority.

13. ii)Counting Mode: When toggle switch is in counting mode ,
Counting mode” in displayed on the screen, and total number of
votes to respective candidate can be displayed on the screen by
pressing the respective key assigned to them.
 Clear mode: Press clear switch when all entries are required to be
erased. Clear switch should be pressed before voting procedure.
Buzzer indication pressing of key in voting mode is indicated by a
buzzer sound.
 Controller switch: This switch is provided for enabling the
keypad in voting mode. This switch is under the control of voting
authority.

14. APPLICATIONS
 This could be used for voting purpose at any required place.
 It is used in general elections for choosing candidates to represent
people at various stages.
 It can be used in school, college student union elections.
 It can be used to find the general opinion of people on various issues.
 Anywhere where majority opinion is to be found out.

15. ADVANTAGES
 It is economical.
 Less manpower required.
 Time conscious, as less time required for voting & counting.
 Avoids invalid voting.
 Saves transportation cost due to its compact size.
 Convenient on the part of voter.

16.  We have to provide continuous power supply.
 Limited number of candidates.
 More candidates mean complicated circuit.
DISADVANTAGES

17. CONCLUSION
 This project can be used for voting since it overcome
all the drawbacks of ordinary voting machine.
 It provides additional security.
 The system can be manufactured simply as well as cheap.

18. REFERENCES
 BOOKS
1)Kenneth J.Ayala; “The 8051 Microcontroller Architecture,
Programming & Applications” Penram International,1996/Thomson
Learning 2nd edition ,2005
2)Muhammad Ali Mazidi and Jenice Gillespie Mazidi and Rollin D
McKinlay;”The 8051 Microcontroller and Embedded Systems –
using assembly and C “-PHI,2006/Pearson,2nd 2006
 WEBSITES
1)www.howstuffworks.com
2)wwwdnatechindia.com
 MAGAZINES
1)Electronics For You
2)electrikindia

19. THANK YOU