void setup() {
  Serial.begin(9600);
}

void loop() {
  int adcValue = analogRead(A0);     
  float voltage = adcValue * (5.0 / 1023.0); 
  Serial.print("ADC: ");
  Serial.print(adcValue);

  Serial.print("| Voltage: ");
  Serial.println(voltage);

  delay(200);
}