const int potentiometer = 33;

void setup() {
  Serial.begin(115200);
}

void loop() {
  int value = analogRead(potentiometer); 
  float voltage = (value / 4095.0) * 3.3;
  Serial.print("Valeur avant DC : ");
  Serial.print(value);
  Serial.print("   Tension : ");
  Serial.print(voltage);
  Serial.println(" V");
  delay(100);
}