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7 Segment Display Interfacing

This is an easy zero to nine counter circuit made victimization Arduino! Here, a standard cathode 7-segment semiconductor diode show is connected to Arduino for displaying the digits.

The code (Arduino sketch) permits electric switch increment of the counter from zero to nine.

The whole circuit will be supercharged from a customary 9V PP3/6F22 battery, or from any appropriate Arduino power device.

The seven-phase show is, in fact, an awfully straightforward device. it’s a mixture of eight LEDs (the mathematical notation -DP- is that the 8th), which might be organized in order that completely different mixtures will be accustomed build numerical digits.

Circuit Schematics

The connections which are done for 7 segment display are given below:

PIN1 or E to PIN 6 of ARDUINO UNO

PIN2 or D to PIN 5

PIN4 or C to PIN 4

PIN5 or H or DP to PIN 9 ///not needed as we are not using the decimal point

PIN6 or B to PIN 3

PIN7 or A to PIN 2

PIN9 or F to PIN 7

PIN10 or G to PIN 8

PIN3 or PIN8 or CC to ground through a 100Ω resistor.

Components needed for this Project

Arduino Board ……………………………[ Purchase This Amazon | Aliexpress ]
2x 330 Ohms Resistors……………….. [ Purchase This Amazon | Aliexpress ]
Breadboard and Jump Wires ………[ Purchase This Amazon | Aliexpress ]
7 Segment LED Display ……..[ Purchase This Amazon | Aliexpress ]

*Please note: These are affiliate links. I may make a commission if you buy the components through these links. I would appreciate your support in this way!

Source Codes

 /*    Segment Led Display Using Arduino
 *      
 *  by Dejan Nedelkovski,https://earthbondhon.com/arduino-segment-led-display-counter/
 *  
 */

//Segment Led Display
#define segA 2//connecting segment A to PIN2

#define segB 3// connecting segment B to PIN3

#define segC 4// connecting segment C to PIN4

#define segD 5// connecting segment D to PIN5

#define segE 6// connecting segment E to PIN6

#define segF 7// connecting segment F to PIN7

#define segG 8// connecting segment G to PIN8 

int COUNT=0;//count integer for 0-9 increment

void setup()

{
for (int i=2;i<9;i++)
{
pinMode(i, OUTPUT);// taking all pins from 2-8 as output
}
}
void loop()

{

switch (COUNT)

             {
                case 0://when count value is zero show”0” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, HIGH);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, LOW);

                break;
                

                case 1:// when count value is 1 show”1” on disp

                digitalWrite(segA, LOW);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, LOW);

                digitalWrite(segE, LOW);

                digitalWrite(segF, LOW);

                digitalWrite(segG, LOW);

                break;
 

                case 2:// when count value is 2 show”2” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, LOW);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, HIGH);

                digitalWrite(segF, LOW);

                digitalWrite(segG, HIGH);

                break;

 
                case 3:// when count value is 3 show”3” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, LOW);

                digitalWrite(segF, LOW);

                digitalWrite(segG, HIGH);

                break;

 
                case 4:// when count value is 4 show”4” on disp

                digitalWrite(segA, LOW);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, LOW);

                digitalWrite(segE, LOW);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, HIGH);

                break;

 
                case 5:// when count value is 5 show”5” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, LOW);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, LOW);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, HIGH);

                break;

 
               case 6:// when count value is 6 show”6” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, LOW);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, HIGH);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, HIGH);

                break;

 

                case 7:// when count value is 7 show”7” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, LOW);

                digitalWrite(segE, LOW);

                digitalWrite(segF, LOW);

                digitalWrite(segG, LOW);

                break;

 

                case 8:// when count value is 8 show”8” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, HIGH);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, HIGH);

                break;

 

                case 9:// when count value is 9 show”9” on disp

                digitalWrite(segA, HIGH);

                digitalWrite(segB, HIGH);

                digitalWrite(segC, HIGH);

                digitalWrite(segD, HIGH);

                digitalWrite(segE, LOW);

                digitalWrite(segF, HIGH);

                digitalWrite(segG, HIGH);

                break;

 

                break;

                }

                if (COUNT<10)

                {
                                COUNT++;

                                delay(1000);///increment count integer for every second

                }

                if (COUNT==10)

                {

                                COUNT=0;// if count integer value is equal to 10, reset it to zero.

                                delay(1000);

                }

}

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

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