#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

void setup() {
  lcd.begin(16, 2);
  pinMode(A0, INPUT);
}
int vout = 0;
void loop() {
  digitalWrite(6, HIGH);
  vout = analogRead(A0);
  lcd.setCursor(0,0);
  lcd.print("Digit. voltmeter");

  lcd.setCursor(0,1);
  lcd.print("U=");
  lcd.print(vout * 5.0/1024);
  lcd.print("V");
  delay(1000);
}