Electronic voting machine and microcontroller 8051

1. PRESENTED BY-GROUP 4
161-15-7096
151-15-4740
Electronic Voting Machine

2. Introduction
 A voting machine is a machine used to register
and tabulate votes. The first voting machines were
mechanical but it is increasingly more common to
use electronic voting machines.
 Voting machines have different levels of usability,
security, efficiency and accuracy.

3. History
 The first major proposal for the use of voting
machines came from the Chartists in 1838.
 In 1875, Henry Spratt of Kent received a U.S. patent
for a voting machine that presented the ballot as an
array of push buttons, one per candidate.
 Anthony Beranek of Chicago patented the first voting
machine appropriate for use in a general election in
the United States.

4. Component List
 Micro controller 8051
 LCD(16*2Alphanumaric)
 Power supply
 Control switches

5. Block diagram of EVM

6. MICRO-CONTROLLER 8051
 Microcontroller 8051 is designed in 1980’s by Intel.
 It is mainly an 8-bit microcontroller.
 Multiply, divide and compare instructions
 UART (serial port)
 It contains four ports.

7. Pin Diagram of 8051

8. Basic Pins
 PIN 9(reset pin)
 PINS 18 & 19(provides clock pules to the circuit)
 PIN 40 and 20( VCC and ground respectively)
 Pin 29( external ROM )
 Pin 30(ALE)
 Pin 31(multiple memories)

9. Ports
 PORT P1 (Pins 1 to 8)
 PORT P3 (Pins 10 to 17)
 PORT P2 (pins 21 to 28)
 PORT P0 (pins 32 to 39)

10. Main blocks of EVM
 Keypad block
 Micro controller block
 Display block
 Control switches block

11. Principal of Operation
 Power on: When supply is turned on WHITE LED
glows.
 Mode selection:
VOTING MODE:
-toggle switch on VCC
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 nd again enable for voting
after Control switch being pressed by
the voting Authority.
COUNTING MODE
-toggle switch on GND.
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

12. Principal of Operation
 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

13. LCD 2*16
 The Serial LCDs are very functional, liquid crystal
displays that can be easily interfaced to and
controlled by a microcontroller using an I/O pin.
 This device can be connected to a PC serial port
using a MAX232 line driver.
 The LCD displays provide basic text wrapping so that
your text looks correct on the display.

14. 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.

15. DISADVANTAGES
 Security issues and unequal internet access.
 We have to use external chip to store the votes.
 We have provide continuous power supply,

16. Circuit Diagram

17. EVM