#include "LiquidCrystal.h"

const int voltageSensor = A0;

float vOUT = 0.0;

float vIN = 0.0;

float R1 = 30000.0;

float R2 = 7500.0;

int value = 0;

LiquidCrystal lcd(7, 6, 5, 4, 3, 2); // RS, E, D4, D5, D6, D7

void setup()

{

//Serial.begin(9600);

lcd.begin(16,2);

lcd.print(" Measure > 25V  ");

delay(2000);

}

void loop()

{

 value = analogRead(voltageSensor);

 vOUT = (value * 5.0) / 1024.0;

 vIN = vOUT / (R2/(R1+R2));

 //Serial.print("Input = ");

 //Serial.println(vIN);

 lcd.setCursor(0,0);

 lcd.print("Input =         ");

 lcd.setCursor(9,0);

 lcd.print(vIN);

 delay(500);

}