Make Auto Counter use Multiplexing seven segment display and PIC Microcontroller

In this tutorial we will learn how to make Auto counter use multiplexing seven segment display. Here I am use PIC16F877A microcontroller and 3 digit multiplexing seven segment display.

You can watch the following video or read the written tutorial bellow.

7 segment display

seven segment display has 7 segment and each segment emit light. When segment a,b,c,d,e & f emit light than the display show the decimal value 0.

3 digit 7 segment display

0.56'' - digit size

Circuit Diagram

Mikro C Code:

	// Common Cathod Multiplexing 7 segment display
	char display[10] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
	int i;
	char digit1,digit2,digit3;
	void main(){
	TRISB = 0X00;
	TRISD = 0X00;
	PORTB = 0X00;
	PORTD = 0X00;
	while(1){
	for(i=0;i<1000;i++){
	digit1 = i/100;
	digit2 = (i/10)%10;
	digit3 = i%10;

	PORTB = display[digit1];
	PORTD = 0X01;
	delay_ms(5);
	PORTD = 0X00;

	PORTB = display[digit2];
	PORTD = 0X02;
	delay_ms(5);
	PORTD = 0X00;

	PORTB = display[digit3];
	PORTD = 0X04;
	delay_ms(5);
	PORTD = 0X00;

	delay_ms(250);
	}
	}
	}