// on declare que l'on va utiliser une entreee analogique et lui donnons un nom

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600); // On etablie une connexion entre la carte et "l'écran"

pinMode (2, OUTPUT);
pinMode (3, OUTPUT); // On declare chaque port numérique come étant une sortie.
pinMode (4, OUTPUT);
pinMode (5, OUTPUT);
pinMode (6, OUTPUT);
pinMode (7, OUTPUT);
pinMode (8, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
int ValeurBrut = analogRead(A1);  /* je recupere la valeur lue par l'entrée analogique.
Ce n'est qu'une valeur proportionnelle et non grandeur physique.*/

/*Serial.print( "Valeur renvoyée par le potentiometre : ");
Serial.print (ValeurBrut);
Serial.print( " Ohm");*/

//La valeur maximale que peut prendre l'entrée Analogique est 1023. 
//ce qui correspond a 100% de la charge.
/*Admettons que le potentiometre a une charge maximale de 1000 ohm. */
int ResisVrai = map(ValeurBrut,0,1023,0,10000); // on rapporte la plage de valeur initiale a celle du potentiometre
int Affiche = map(ValeurBrut,0,1023,0,9);
Serial.print( "La résistance correspondante est de : ");
Serial.print (ResisVrai);
Serial.println(" Ohm");
Serial.print("La valeur affichée est");
Serial.println(Affiche);

switch (Affiche){
    case 0:
      digitalWrite(2,LOW);
      digitalWrite(3,LOW);
      digitalWrite(4,LOW);
      digitalWrite(5,LOW);
      digitalWrite(6,LOW);
      digitalWrite(7,LOW);
      digitalWrite(8,HIGH);
      break;
    case 1:
      digitalWrite(2,HIGH);
      digitalWrite(3,LOW);
      digitalWrite(4,LOW);
      digitalWrite(5,HIGH);
      digitalWrite(6,HIGH);
      digitalWrite(7,HIGH);
      digitalWrite(8,HIGH);
      break;
    case 2:
      digitalWrite(2,LOW);
      digitalWrite(3,LOW);
      digitalWrite(4,HIGH);
      digitalWrite(5,LOW);
      digitalWrite(6,LOW);
      digitalWrite(7,HIGH);
      digitalWrite(8,LOW);
      break;
    case 3:
       digitalWrite(2,LOW);
      digitalWrite(3,LOW);
      digitalWrite(4,LOW);
      digitalWrite(5,LOW);
      digitalWrite(6,HIGH);
      digitalWrite(7,HIGH);
      digitalWrite(8,LOW);
      break;
    case 4:
      digitalWrite(2,HIGH);
      digitalWrite(3,LOW);
      digitalWrite(4,LOW);
      digitalWrite(5,HIGH);
      digitalWrite(6,HIGH);
      digitalWrite(7,LOW);
      digitalWrite(8,LOW);
      break;
    case 5:
       digitalWrite(2,LOW);
      digitalWrite(3,HIGH);
      digitalWrite(4,LOW);
      digitalWrite(5,LOW);
      digitalWrite(6,HIGH);
      digitalWrite(7,LOW);
      digitalWrite(8,LOW);
      break;
    case 6:
      digitalWrite(2,LOW);
      digitalWrite(3,HIGH);
      digitalWrite(4,LOW);
      digitalWrite(5,LOW);
      digitalWrite(6,LOW);
      digitalWrite(7,LOW);
      digitalWrite(8,LOW);
      break;
    case 7:
      digitalWrite(2,LOW);
      digitalWrite(3,LOW);
      digitalWrite(4,LOW);
      digitalWrite(5,HIGH);
      digitalWrite(6,HIGH);
      digitalWrite(7,HIGH);
      digitalWrite(8,HIGH);
      break;
    case 8:
      digitalWrite(2,LOW);
      digitalWrite(3,LOW);
      digitalWrite(4,LOW);
      digitalWrite(5,LOW);
      digitalWrite(6,LOW);
      digitalWrite(7,LOW);
      digitalWrite(8,LOW);
      break;
    case 9:
      digitalWrite(2,LOW);
      digitalWrite(3,LOW);
      digitalWrite(4,LOW);
      digitalWrite(5,LOW);
      digitalWrite(6,HIGH);
      digitalWrite(7,LOW);
      digitalWrite(8,LOW);
      break;
    default:
      digitalWrite(2,HIGH);
      digitalWrite(3,HIGH);
      digitalWrite(4,HIGH);
      digitalWrite(5,HIGH);
      digitalWrite(6,HIGH);
      digitalWrite(7,HIGH);
      digitalWrite(8,HIGH);
      break;




}
  
delay (250);
}