#include <Wire.h>  
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
float voltage = 0.0;
float V = 0.0;
float temp=0.0;
int analog_value = 0;
void setup()
{
   lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.print("Voltmeter");
  lcd.setCursor(2, 1);
  lcd.print("MOTHERFUCKER!");
  delay(2000);
}
void loop()
{
   analog_value = analogRead(A0);
   temp = (analog_value * 5.0) / 1024.0;
   voltage = temp/(0.0909);
   if (voltage < 0.1)
   {
     voltage=0.0;
   }
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("VOLTAGE= ");
    lcd.print(voltage);
    lcd.setCursor(14,0);
    lcd.print("V");
    delay(30);
}