Arduino RTC DS1307 Shield

DS1307 is a real-time chip of DALLAS company,which adopt I2C protocal to communicate with SCM, and there was this kind interface on Arduino, therefore is very convenient to link with each other. DS1307 have a programmable waveforms output, it can be used to drive LED lights, or trigger a certain event as a break off, but be careful when you use it to take some kind of high power module. We design the real clock module to pin out the I2C interface of Ds1307 and programmable waveforms output interface SQW are connected, but usually we will only use the I2C interface to realize basic set the clock/read function. Note, this module must be installed on the battery can work normally. The battery is button batteries (type CR1220), the positive upward:


Note : this shield don't include the batteries


This module communicate with Arduino through the I2C interface.It will be better to use with Arduino-Sensor-Shield-V4.0 and the Arduino-I2C-COM-Cable.


This module can be used with Arduino Special Sensor Shield V4.0.
You can do some simple design about it，it support“plug and play”。

In circuit connection, we can use Arduino sensor shield V4 board, but set the corresponding jumpers wires to IIC position :




Then connect with Arduino Special Sensor Shield V4.0.




Download the DS1307 Library 1 or Library 2

then uncompress DS1307 Library 1 or Library 2 into libraries of Arduino 0018 and restart ;

Testing Code :

#include <WProgram.h>
#include <Wire.h>
#include <DS1307.h> // written by  mattt on the Arduino forum and modified by D. Sjunnesson

void setup()
{
  Serial.begin(9600);

  RTC.stop();
  RTC.set(DS1307_SEC,1);        //set the seconds
  RTC.set(DS1307_MIN,23);     //set the minutes
  RTC.set(DS1307_HR,12);       //set the hours
  RTC.set(DS1307_DOW,4);       //set the day of the week
  RTC.set(DS1307_DATE,15);       //set the date
  RTC.set(DS1307_MTH,7);        //set the month
  RTC.set(DS1307_YR,10);         //set the year
  RTC.start();

}

void loop()
{

  Serial.print(RTC.get(DS1307_HR,true)); //read the hour and also update all the values by pushing in true
  Serial.print(":");
  Serial.print(RTC.get(DS1307_MIN,false));//read minutes without update (false)
  Serial.print(":");
  Serial.print(RTC.get(DS1307_SEC,false));//read seconds
  Serial.print("      ");                 // some space for a more happy life
  Serial.print(RTC.get(DS1307_DATE,false));//read date
  Serial.print("/");
  Serial.print(RTC.get(DS1307_MTH,false));//read month
  Serial.print("/");
  Serial.print(RTC.get(DS1307_YR,false)); //read year 
  Serial.println();

  delay(1000);
}

The Result : 

Download the code into Arduini oo18 and run , you can watch the result 
through the serial watching window  :