Arduino Real Time clock with 8 Digit Segment-Display

rtc_8segment.ino

/*
rtc_8segement

Real Time Clock with 8 Digit Segment-Display

Needed Hardware

An Arduino or compatible board like:
http://www.play-zone.ch/de/elektronik-kit-zubehoer/avr-arduino-freeduino/boards-kompatibel/freaduino-v1-2-mit-atmega328-100-arduino-kompatibel.html

8 Digit Segment-Display with MAX7219
http://www.play-zone.ch/de/8-zeichen-segment-display-mit-max7219.html

Adafruit DS1307 RTC Breakout Board - Kit
http://www.play-zone.ch/de/adafruit-ds1307-real-time-clock-breakout-board-kit.html

Potentiometer 100K
http://www.play-zone.ch/de/potentiometer-b100k.html

Created by:
05/17/2012 by Marcel Hauri, http://m83.ch

*/


#include <LedControl.h>
#include <Wire.h>
#include "RTClib.h"

// SDA: A5
// SCL: A4
RTC_DS1307 RTC;

// PIN 10: CS
// PIN 11: CLK
// PIN 12: DIN
LedControl lc=LedControl(12,11,10,1);

void setup() {
  lc.shutdown(0,false);
  lc.setIntensity(0,1);
  lc.clearDisplay(0);
  Serial.begin(9600);
  Wire.begin();
  RTC.begin();
  
  if (! RTC.isrunning()) {
    RTC.adjust(DateTime(__DATE__, __TIME__));
  }
}

void printLCD(int v, int a, int b) {
    int ones;
    int tens;
    
    ones=v%10;
    v=v/10;
    tens=v%10;

    lc.setDigit(0,a,(byte)ones,false);
    lc.setDigit(0,b,(byte)tens,false);
}

void loop() {
  DateTime now = RTC.now();
  
  int sensorValue = analogRead(A0);
  int val = (sensorValue/100)+1;
  lc.setIntensity(0,val);
  
  printLCD(now.second(), 0, 1);
  lc.setChar(0,2,'-',false);
  printLCD(now.minute(), 3, 4);  
  lc.setChar(0,5,'-',false);
  printLCD(now.hour(), 6, 7); 
  delay(10);
}

Would it be possible that you update this Sketch with the DS3231
That would be great!