#define A 2
#define B 3
#define C 4
#define D 5
#define E 6
#define F 7
#define G 8
#define DOT 9
#define SEG1 13
#define SEG2 12
#define SEG3 11
#define TAMBAH A0
#define KURANG A1
#define POT A2

void setup() 
{
  // put your setup code here, to run once:
 pinMode(A, OUTPUT);
 pinMode(B, OUTPUT);
 pinMode(C, OUTPUT);
 pinMode(D, OUTPUT);
 pinMode(E, OUTPUT);
 pinMode(F, OUTPUT);
 pinMode(G, OUTPUT);
 pinMode(DOT, OUTPUT);
 pinMode(SEG1, OUTPUT);
 pinMode(SEG2, OUTPUT);
 pinMode(SEG3, OUTPUT);
 pinMode(TAMBAH, INPUT);
 pinMode(KURANG, INPUT);
 pinMode(POT, INPUT);
 Serial.begin(9600);
}

void out_port(byte temp)
{
  digitalWrite(A, temp&0B00000001);
  digitalWrite(B, temp&0B00000010);
  digitalWrite(C, temp&0B00000100);
  digitalWrite(D, temp&0B00001000);
  digitalWrite(E, temp&0B00010000);
  digitalWrite(F, temp&0B00100000);
  digitalWrite(G, temp&0B01000000);
  digitalWrite(DOT, temp&0B10000000);
}

byte tabelseg[]=
{
  0b11000000, //0
  0b11111001, //1
  0b10100100, //2
  0b10110000, //3
  0b10011001, //4
  0b10010010, //5
  0b10000010, //6
  0b11111000, //7
  0b10000000, //8
  0b10010000, //9
  0b01111111, //dot
};

byte i=0;
byte ratusan, puluhan, satuan;

void loop() 
{
 //digitalWrite(SEG1, HIGH);
 // put your main code here, to run repeatedly:

 /*if(digitalRead(TAMBAH)==HIGH && i<255)
 {
  i++;
  delay(200);
  Serial.println(i);
 }

 if(digitalRead(KURANG)==HIGH && i>0)
 {
  i--;
  delay(200);
  Serial.println(i);
 }*/
 
 i=(analogRead(POT))/4;


 ratusan=i/100;
 puluhan=i/10; //misal 12/10=1, nilai 1 masuk ke puluhan
 puluhan=puluhan%10;
 satuan=i%10; //misal 12%10 sisa 2, nilai 2 masuk ke satuan

 out_port (tabelseg[satuan]);
 digitalWrite(SEG1, HIGH);
 delay(50);
 digitalWrite(SEG1, LOW);

 out_port (tabelseg[puluhan]);
 digitalWrite(SEG2, HIGH);
 delay(50);
 digitalWrite(SEG2, LOW);
 
 out_port (tabelseg[ratusan]);
 digitalWrite(SEG3, HIGH);
 delay(50);
 digitalWrite(SEG3, LOW);

}