#include <Arduino.h>

int VOLUME_SOCKET = A0;

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

void loop() {
  int analog_val;
  float input_volt;

  analog_val = analogRead(VOLUME_SOCKET);

  input_volt = float ( analog_val) * (5.0 / 1024.0);

  Serial.print(analog_val);
  Serial.print( " : " );
  Serial.print(input_volt);
  Serial.println("V");

  delay(500);


}