RTC with Arduino

#include <LiquidCrystal.h>

#include <Wire.h>

#include "RTClib.h"

// LCD

// LCD D4 to Arduino 9

// LCD D5 to Arduino 10

// LCD D6 to Arduino 11

// LCD D7 to Arduino 12

// RS 4 to Arduino 7

// EN 6 to Arduino 8

// RH 5 to GND

// pin 3 to center pot

LiquidCrystal lcd(23, 22, 21, 20, 19, 18);  

// DS1307 RTC

// SDA pin to Arduino A4

// SCL pin to Arduino A5

RTC_DS1307 RTC;

void setup() {

  Serial.begin(57600);

  Wire.begin();

  RTC.begin();

  /*

  if (! RTC.isrunning()) {

   Serial.println("RTC is NOT running!");

   // following line sets the RTC to the date & time this sketch was compiled

   //  RTC.adjust(DateTime(10/23/2012, 10:30:00));

   }

   */

  lcd.begin(16,2); // 16x2 LCD

  lcd.clear(); // blank the display

}

void loop() {

  DateTime now = RTC.now();

  lcd.clear();

  lcd.setCursor(0,0);

  if (now.day() < 10) {

    lcd.print("0");

  }

  lcd.print(now.month(), DEC);

  lcd.print("/");

  if (now.month() < 10) {

    lcd.print("0");

  }

  lcd.print(now.day(), DEC);

  lcd.print("/");

  lcd.print(now.year(), DEC);

  lcd.setCursor(0,1);

  if (now.hour() < 10) {

    lcd.print("0");

  }

  lcd.print(now.hour(), DEC);

  lcd.print(":");

  if (now.minute() < 10) {

    lcd.print("0");

  }

  lcd.print(now.minute(), DEC);

  lcd.print(":");

  if (now.second() < 10) {

    lcd.print("0");

  }

  lcd.print(now.second(), DEC);

  delay(1000);

}