Electronic Voting Machine Using PIC Microcontroller

Here you see how easily we can make Electronic Voting Machine Using PIC Microcontroller. By using this machine we can conduct any voting function like audience poll in school, college quiz competition or any small scale general election.

Project Description:

To make our project “Electronic Voting Machine Using PIC Microcontroller”, we need some component like
1)    Microcontroller (PIC16f877)
2)    6 no push switch
3)    Buzzer
4)    LCD Display
Now question is how our Electronic Voting Machine is work? See below the proteus simulation circuit diagram.

In above circuit diagram you see that four numbers of push button are used for voting four candidates. One master button is their which ensure that any participant can vote one candidate at a time. When a participant want to cast his vote master Switch has to be press to active the system and when participant press any puss button to vote the system will deactivated. Then any button will not work until press master button again. Bellow the master button there has a count button when we press that it will show the result candidate wise

See the embedded c code written in Mikroc Pro for PIC for our project “Electronic Voting Machine Using PIC Microcontroller”.

Embedded C Code

// Name : Interfacing 4×4 keypad with LCD using pic16f877 microcontroller

// Author : hope jy
// Date : 31/10/2017
// Website : http://www.sltechservice.com.ng/
// LCD module connections
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD module connections

char txt[7],txt1[7],txt2[7],txt3[7];

void main() {
int a=0,b=0;
int c=0,d=0,e=0;
trisd=1;
portd=0;
trisc=0;
portc=0;

while(1)
{
Lcd_Init(); // Initialize Lcd
Lcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
Lcd_Out(1,1,”press button “); // Write text in first row
Lcd_Out(2,1,”cast your vote”); // Write text in second row

while(portd==0)
{ // This loop use for pusing the system
}

if (portd==0b00100000)
{
e=1;
}
while (e==1)
{
Lcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Out(1,1,”1:xyz 2:yzx”); // Write text in first row
Lcd_Out(2,1,”3:zxy 4:yxz”); // Write text in second row
while(portd==0)
{
}
portc=0b00000001;
delay_ms(100);
portc=0b00000000;
Lcd_Out(2,1,”voting”);

if (portd==0b00000001)
{
a=a+1;
e=0;
}
if (portd==0b00000010)
{
b=b+1;
e=0;
}
if (portd==0b00000100)
{
c=c+1;
e=0;
}
if (portd==0b00001000)
{
d=d+1;
e=0;
}
if (portd==0b00010000)
{
Lcd_Cmd(_LCD_CLEAR);
inttostr(a, txt);
inttostr(b, txt1);
inttostr(c, txt2);
inttostr(d, txt3);
delay_ms(500);
Lcd_out(1,1,”1:”); // Write text in first row
Lcd_out(1,4,txt); // Write text in first row
Lcd_out(2,1,”3:”); // Write text in second row
Lcd_out(2,4,txt2); // Write text in second row
delay_ms(2000);
Lcd_out(1,1,”2:”); // Write text in first row
Lcd_out(1,4,txt1); // Write text in first row
Lcd_out(2,1,”4:”); // Write text in second row
Lcd_out(2,4,txt3); // Write text in second row
delay_ms(2000);
}

}
}
}