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Cara membuat jam digital dengan arduino

#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif

#include <Wire.h>
#include <DS1307.h>
#include <LiquidCrystal.h>
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
void setup()
{
Serial.begin(9600);
lcd.begin(16, 2);
lcd.print(" Jam Digital   ");
lcd.setCursor(0,1);
lcd.print(" ARDUINO UNO R3");
delay(2000);
lcd.clear();
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,5);       //set the date
RTC.set(DS1307_MTH,3);        //set the month
RTC.set(DS1307_YR,9);         //set the year
RTC.start();

}

void loop()
{
lcd.clear();
lcd.print(RTC.get(DS1307_HR,true)); //read the hour and also update all the values by pushing in true
lcd.print(":");
lcd.print(RTC.get(DS1307_MIN,false));//read minutes without update (false)
lcd.print(":");
lcd.print(RTC.get(DS1307_SEC,false));//read seconds

lcd.setCursor(0,1);
lcd.print(RTC.get(DS1307_DATE,false));//read date
lcd.print("/");
lcd.print(RTC.get(DS1307_MTH,false));//read month
lcd.print("/");
lcd.print(RTC.get(DS1307_YR,false)); //read year
delay(1000);

}
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