//BCD 1 int a1 = 4; //Bit 0 Decoder 1 int a2 = 5; //Bit 1 Decoder 1 int a3 = 6; //Bit 2 Decoder 1 int a4 = 7; //Bit 3 Decoder 1 //BCD 2 int b1 = 8; //Bit 0 Decoder 2 int b2 = 9; //Bit 1 Decoder 2 int b3 = 10; //Bit 2 Decoder 2 int b4 = 11; //Bit 3 Decoder 2 int n; int d1; int d2; void setup() { pinMode(4,OUTPUT); pinMode(5,OUTPUT); pinMode(6,OUTPUT); pinMode(7,OUTPUT); pinMode(8,OUTPUT); pinMode(9,OUTPUT); pinMode(10,OUTPUT); pinMode(11,OUTPUT); } void loop() { n=25; d1=n%10; // This will divide n by 10 and the remainder will be stored in d1 d2=n/10; // This will divide n by 10 and the value before decimal will be stored in d2 disp1(d1); disp2(d2); } void disp1(int num) { if(num == 0)//0000 { digitalWrite(a1, LOW); digitalWrite(a2, LOW); digitalWrite(a3, LOW); digitalWrite(a4, LOW); } if(num == 1)//0001 { digitalWrite(a1, HIGH); digitalWrite(a2, LOW); digitalWrite(a3, LOW); digitalWrite(a4, LOW); } if(num == 2)//0010 { digitalWrite(a1, LOW);//0 digitalWrite(a2, HIGH);//1 digitalWrite(a3, LOW);//0 digitalWrite(a4, LOW);//0 } if(num == 3)//0011 { digitalWrite(a1, HIGH);//1 digitalWrite(a2, HIGH);//1 digitalWrite(a3, LOW);//0 digitalWrite(a4, LOW);//0 } if(num == 4)//0100 { digitalWrite(a1, LOW);//0 digitalWrite(a2, LOW);//0 digitalWrite(a3, HIGH);//1 digitalWrite(a4, LOW);//0 } if(num == 5)//0101 { digitalWrite(a1, HIGH);//1 digitalWrite(a2, LOW);//0 digitalWrite(a3, HIGH);//1 digitalWrite(a4, LOW);//0 } if(num == 6)//0110 { digitalWrite(a1, LOW);//0 digitalWrite(a2, LOW);//1 digitalWrite(a3, LOW);//1 digitalWrite(a4, HIGH);//0 } if(num == 7) //0111 { digitalWrite(a1, LOW);//1 digitalWrite(a2, LOW);//1 digitalWrite(a3, LOW);//1 digitalWrite(a4, HIGH);//0 } if(num == 8) //1000 { digitalWrite(a1, LOW);//0 digitalWrite(a2, LOW);//0 digitalWrite(a3, LOW);//0 digitalWrite(a4, HIGH);//1 } if(num == 9)//1001 { digitalWrite(a1, LOW);//1 digitalWrite(a2, LOW);//0 digitalWrite(a3, LOW);//0 digitalWrite(a4, HIGH);//1 } } void disp2(int num) { if(num == 0)//0000 { digitalWrite(b1, LOW);// digitalWrite(b2, LOW);//0 digitalWrite(b3, LOW);//0 digitalWrite(b4, LOW);//0 } if(num == 1)//0001 { digitalWrite(b1, HIGH);//1 digitalWrite(b2, LOW);//0 digitalWrite(b3, LOW);//0 digitalWrite(b4, LOW);//0 } if(num == 2)//0010 { digitalWrite(b1, LOW);//0 digitalWrite(b2, HIGH);//1 digitalWrite(b3, LOW);//0 digitalWrite(b4, LOW);//0 } if(num == 3)//0011 { digitalWrite(b1, HIGH);//1 digitalWrite(b2, HIGH);//1 digitalWrite(b3, LOW);//0 digitalWrite(b4, LOW);//0 } if(num == 4)//0100 { digitalWrite(b1, LOW);//0 digitalWrite(b2, LOW);//0 digitalWrite(b3, HIGH);//1 digitalWrite(b4, LOW);//0 } if(num == 5) //0101 { digitalWrite(b1, HIGH);//1 digitalWrite(b2, LOW);//0 digitalWrite(b3, HIGH);//1 digitalWrite(b4, LOW);//0 } if(num == 6) //0110 { digitalWrite(b1, LOW);//0 digitalWrite(b2, LOW);//1 digitalWrite(b3, LOW);//1 digitalWrite(b4, HIGH);//0 } if(num == 7) //0111 { digitalWrite(b1, LOW);//1 digitalWrite(b2, LOW);//1 digitalWrite(b3, LOW);//1 digitalWrite(b4, HIGH);//0 } if(num == 8) //1000 { digitalWrite(b1, LOW);//0 digitalWrite(b2, LOW);//0 digitalWrite(b3, LOW);//0 digitalWrite(b4, HIGH);//1 } if(num == 9)//1001 { digitalWrite(b1, LOW);//1 digitalWrite(b2, LOW);//0 digitalWrite(b3, LOW);//0 digitalWrite(b4, HIGH);//1 } }