2Digit7SegmentsLED.ino

const int A = 10;
const int B = 2;
const int C = 3;
const int D = 4;
const int E = 5;
const int F = 6;
const int G = 7;
const int DIG1 = 8;
const int DIG2 = 9;
int i;

void setup() {
  pinMode(A,OUTPUT);
  pinMode(B,OUTPUT);
  pinMode(C,OUTPUT);
  pinMode(D,OUTPUT);
  pinMode(E,OUTPUT);
  pinMode(F,OUTPUT);
  pinMode(G,OUTPUT);
  pinMode(DIG1,OUTPUT);
  pinMode(DIG2,OUTPUT);
  i =0;

}

//1桁目と2桁目を交互に光らす。
void loop() {
  
  for(int j=0; j<50; j++) {
  digitalWrite(DIG1,LOW);
  digitalWrite(DIG2,HIGH);
  ledSeg(i/10);
  
  delay(10);
  
  digitalWrite(DIG1,HIGH);
  digitalWrite(DIG2,LOW);
  ledSeg(i%10);
  delay(10);
  }
  i++;
  if(i>100) i=0;
   
}

//光らせる部分を指定
void ledSeg(int val) {
  switch(val) {
    case 0:
      digitalWrite(A,LOW);
      digitalWrite(B,LOW);
      digitalWrite(C,LOW);
      digitalWrite(D,LOW);
      digitalWrite(E,LOW);
      digitalWrite(F,LOW);
      digitalWrite(G,HIGH);
    break;

    case 1:
      digitalWrite(A,HIGH);
      digitalWrite(B,LOW);
      digitalWrite(C,LOW);
      digitalWrite(D,HIGH);
      digitalWrite(E,HIGH);
      digitalWrite(F,HIGH);
      digitalWrite(G,HIGH);
    break;

    case 2:
      digitalWrite(A,LOW);
      digitalWrite(B,LOW);
      digitalWrite(C,HIGH);
      digitalWrite(D,LOW);
      digitalWrite(E,LOW);
      digitalWrite(F,HIGH);
      digitalWrite(G,LOW);
    break;

    case 3:
      digitalWrite(A,LOW);
      digitalWrite(B,LOW);
      digitalWrite(C,LOW);
      digitalWrite(D,LOW);
      digitalWrite(E,HIGH);
      digitalWrite(F,HIGH);
      digitalWrite(G,LOW);
    break;

    case 4:
      digitalWrite(A,HIGH);
      digitalWrite(B,LOW);
      digitalWrite(C,LOW);
      digitalWrite(D,HIGH);
      digitalWrite(E,HIGH);
      digitalWrite(F,LOW);
      digitalWrite(G,LOW);
    break;

    case 5:
      digitalWrite(A,LOW);
      digitalWrite(B,HIGH);
      digitalWrite(C,LOW);
      digitalWrite(D,LOW);
      digitalWrite(E,HIGH);
      digitalWrite(F,LOW);
      digitalWrite(G,LOW);
    break;

    case 6:
      digitalWrite(A,LOW);
      digitalWrite(B,HIGH);
      digitalWrite(C,LOW);
      digitalWrite(D,LOW);
      digitalWrite(E,LOW);
      digitalWrite(F,LOW);
      digitalWrite(G,LOW);
    break;

    case 7:
      digitalWrite(A,LOW);
      digitalWrite(B,LOW);
      digitalWrite(C,LOW);
      digitalWrite(D,HIGH);
      digitalWrite(E,HIGH);
      digitalWrite(F,LOW);
      digitalWrite(G,HIGH);
    break;

    case 8:
      digitalWrite(A,LOW);
      digitalWrite(B,LOW);
      digitalWrite(C,LOW);
      digitalWrite(D,LOW);
      digitalWrite(E,LOW);
      digitalWrite(F,LOW);
      digitalWrite(G,LOW);
    break;

    case 9:
      digitalWrite(A,LOW);
      digitalWrite(B,LOW);
      digitalWrite(C,LOW);
      digitalWrite(D,LOW);
      digitalWrite(E,HIGH);
      digitalWrite(F,LOW);
      digitalWrite(G,LOW);
    break;
  }
}