LDR

void setup ()

{

Serial.begin(9600);

}

void loop()

{

int valeurA0;

float tension,resistance;

valeurA0=analogRead(A0);

tension=5.0*valeurA0/1023.0;

Serial.print(tension);

Serial.println(" V");

resistance=((5.0*10)/(tension))-10.0;

Serial.print(resistance);

Serial.println(" kiloOhms");

delay(1000);

}