Connection for seven segment display to Arduino Nano with code

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Common Anode Seven Segment Display to Arduino Nano 

For common Anode 5v is given through resistor 

In common Anode when we give input high that elements will be OFF.

To ON A,B,C,D,E,F,G,DP the input must be low

Code

int seg_a = 11; // declaring the variables
int seg_b = 10;
int seg_c = 9;
int seg_d = 8;
int seg_e = 7;
int seg_f = 6;
int seg_g = 5;
int seg_dp = 4;
int com = 12;

void setup() {
  pinMode(seg_a,OUTPUT); //  all pins used to outputs
  pinMode(seg_b,OUTPUT);
  pinMode(seg_c,OUTPUT);
  pinMode(seg_d,OUTPUT);
  pinMode(seg_e,OUTPUT);
  pinMode(seg_f,OUTPUT);
  pinMode(seg_g,OUTPUT);
  pinMode(seg_dp,OUTPUT);
  pinMode(com,OUTPUT);
  
}

void loop() {
digitalWrite(com,HIGH); // common anode HIGH (5V) 
for (int i = 0; i < 10; i++) { // count 0 - 9
 switch(i){ // switch statemet to select the number 
  
  case 0: // set relevent segments HIGH and others LOW
  digitalWrite(seg_a,LOW);
  digitalWrite(seg_b,LOW);
  digitalWrite(seg_c,LOW);
  digitalWrite(seg_d,LOW);
  digitalWrite(seg_e,LOW);
  digitalWrite(seg_f,LOW);
  digitalWrite(seg_g,HIGH);
  digitalWrite(seg_dp,HIGH);
  break;

  case 1:
  digitalWrite(seg_a,HIGH);
  digitalWrite(seg_b,LOW);
  digitalWrite(seg_c,LOW);
  digitalWrite(seg_d,HIGH);
  digitalWrite(seg_e,HIGH);
  digitalWrite(seg_f,HIGH);
  digitalWrite(seg_g,HIGH);
  digitalWrite(seg_dp,HIGH);
  break;

  case 2:
  digitalWrite(seg_a,LOW);
  digitalWrite(seg_b,LOW);
  digitalWrite(seg_c,HIGH);
  digitalWrite(seg_d,LOW);
  digitalWrite(seg_e,LOW);
  digitalWrite(seg_f,HIGH);
  digitalWrite(seg_g,LOW);
  digitalWrite(seg_dp,HIGH);
  break;

  case 3:
  digitalWrite(seg_a,LOW);
  digitalWrite(seg_b,LOW);
  digitalWrite(seg_c,LOW);
  digitalWrite(seg_d,LOW);
  digitalWrite(seg_e,HIGH);
  digitalWrite(seg_f,HIGH);
  digitalWrite(seg_g,LOW);
  digitalWrite(seg_dp,HIGH);
  break;

  case 4:
  digitalWrite(seg_a,HIGH);
  digitalWrite(seg_b,LOW);
  digitalWrite(seg_c,LOW);
  digitalWrite(seg_d,HIGH);
  digitalWrite(seg_e,HIGH);
  digitalWrite(seg_f,LOW);
  digitalWrite(seg_g,LOW);
  digitalWrite(seg_dp,HIGH);
  break;

  case 5:
  digitalWrite(seg_a,LOW);
  digitalWrite(seg_b,HIGH);
  digitalWrite(seg_c,LOW);
  digitalWrite(seg_d,LOW);
  digitalWrite(seg_e,HIGH);
  digitalWrite(seg_f,LOW);
  digitalWrite(seg_g,LOW);
  digitalWrite(seg_dp,HIGH);
  break;

  case 6:
  digitalWrite(seg_a,LOW);
  digitalWrite(seg_b,HIGH);
  digitalWrite(seg_c,LOW);
  digitalWrite(seg_d,LOW);
  digitalWrite(seg_e,LOW);
  digitalWrite(seg_f,LOW);
  digitalWrite(seg_g,LOW);
  digitalWrite(seg_dp,HIGH);
  break;

  case 7:
  digitalWrite(seg_a,LOW);
  digitalWrite(seg_b,LOW);
  digitalWrite(seg_c,LOW);
  digitalWrite(seg_d,HIGH);
  digitalWrite(seg_e,HIGH);
  digitalWrite(seg_f,HIGH);
  digitalWrite(seg_g,HIGH);
  digitalWrite(seg_dp,HIGH);
  break;

  case 8:
  digitalWrite(seg_a,LOW);
  digitalWrite(seg_b,LOW);
  digitalWrite(seg_c,LOW);
  digitalWrite(seg_d,LOW);
  digitalWrite(seg_e,LOW);
  digitalWrite(seg_f,LOW);
  digitalWrite(seg_g,LOW);
  digitalWrite(seg_dp,HIGH);
  break;

  case 9:
  digitalWrite(seg_a,LOW);
  digitalWrite(seg_b,LOW);
  digitalWrite(seg_c,LOW);
  digitalWrite(seg_d,LOW);
  digitalWrite(seg_e,HIGH);
  digitalWrite(seg_f,LOW);
  digitalWrite(seg_g,LOW);
  digitalWrite(seg_dp,HIGH);
  break;

 }
  delay(1000); // Show each number for 1 second
  }


}

Thank You!

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