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Lesson 105: Ultimate Arduino Clocks projects using DS1307

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Lesson 105: Ultimate Arduino Clocks projects using DS1307

Please select other codes for this lecture from the links below.

  • Lesson 19: Introduction to LCD screen
  • Lesson 25: Introduction to HT16K33 Seven Segment Display
  • Purchase LCD Screen from Amazon USA
  • Purchase LCD Screen from Amazon Canada
  • Purchase LCD Screen from all other Amazon
  • Part 13: Clock and Timers

    This in this lesson we have 7 projects in one. We learn how use DS1307 Real-Time Clock (RTC) module to build a clock using Arduino.

    This is project 2-3 In this project we learn how to use DS1207 as alarm clock where we set specific date and time for our alarm and one output pin of Arduino is turned using Alarm. As shown in the video we first turn ON a buzzer as larm and then wiring diagram shown for connecting AC bulb or any other deive to the realy. Relay is just a machanical switch to turn ON or OFF something.

    Projects

    
     /*
     * Lesson 105-1: Building Clock using DS1307 | Robojax Arduino Step By Step Course
     This code:  Project 2-3: DS1307 Alarm with Buzzer and Relay
    In this lesson we learn how to use DS1307 Real-time clock module to build Arduino clock. In this lesson we learn about 7 projects. 
    
    Project 1: Basic DS1307 Clock with Arduino
    Project 2: DS1307 Alarm with Buzzer and Relay (this code)
    Project 3: DS1307 Alarm with Relay and AC Bulb (this code)
    Project 4: LED Seven Segment Clock using DS1307
    Project 5: Unlimited Alarm with Relay
    Project 6: LCD Clock using DS1307
    Project 7: LCD Clock with Alarm 
     * Watch Video instrution for this code:https://youtu.be/gz9xqvRroDY
     * 
     * This code is part of Arduino Step by Step Course which starts here:  https://youtu.be/-6qSrDUA5a8
     * 
     * for library of this code visit http://robojax.com/
     * 
    If you found this tutorial helpful, please support me so I can continue creating 
    content like this. Make a donation using PayPal by credit card https://bit.ly/donate-robojax 
    
     *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
     * This code has been download from Robojax.com
        This program is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.
    
        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.
    
        You should have received a copy of the GNU General Public License
        along with this program.  If not, see <https://www.gnu.org/licenses/>.
    
    
    */
    
    #include <Wire.h>
    #include "RTClib.h"
    
    #define alarmPin 2
    
    const int alarm[]={2019,6,14,22,17,0};
    const int waitTime =4000;
    
    
    RTC_DS1307 rtc;
    
    
    void setup () {
      pinMode(alarmPin,OUTPUT);//set pin 2 as output
     
      while (!Serial); // for Leonardo/Micro/Zero
    
      Serial.begin(9600);
      if (! rtc.begin()) {
        Serial.println("Couldn't find RTC");
        while (1);
      }
    
      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(F(__DATE__), F(__TIME__)));
        // This line sets the RTC with an explicit date & time, for example to set
        // January 21, 2014 at 3am you would call:
         //rtc.adjust(DateTime(2019, 3, 3, 20, 0, 0));
      }
      //rtc.adjust(DateTime(2019, 3, 3, 20, 0, 0));
       //rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
    }
    
    void loop () {
        DateTime robojax = rtc.now();
        Serial.print("Alarm: ");
        for(int i=0;i<6;i++){
          Serial.print(alarm[i]);
          if(i !=5){
            Serial.print("-");
          }
        }
        Serial.println();
        Serial.print("Time:  ");
        Serial.print(robojax.year(), DEC);
        Serial.print("-");
        Serial.print(robojax.month(), DEC);
        Serial.print("-");
        Serial.print(robojax.day(), DEC);
        Serial.print("-");    
        Serial.print(robojax.hour(), DEC);
        Serial.print("-");
        Serial.print(robojax.minute(), DEC);
        Serial.print("-");
        Serial.print(robojax.second(), DEC);
        Serial.println();
     
       if(checkAlarm(robojax)){
        digitalWrite(alarmPin, HIGH);// 
        Serial.print("Alarm Triggered");
        delay(waitTime);
        //while (1);// wait for ever 
       }else{
        digitalWrite(alarmPin, LOW);//
       }
        Serial.println();
        delay(500);
    }
    
    /*
     * 
     * @brief returns true if alarm array matches the current time
     * @param timeNow, is the object for RTC clock
     * @return true if alarm values matches current time
     * Written by Ahmad Shamshiri for Robojax.com 
     * on Friday Jun 14th, 2019 at 20:28 in Ajax, Ontatio, Canada
     * 
     */
    
    boolean checkAlarm(DateTime timeNow){
    
      if(
       alarm[0] ==timeNow.year()
       &&
       alarm[1] ==timeNow.month()
       &&
       alarm[2] ==timeNow.day()
       &&
       alarm[3] ==timeNow.hour()
       &&
       alarm[4] ==timeNow.minute()
       &&
       alarm[5] ==timeNow.second()
       ){
          return true;
       }else{
          return false;
         
       }
      
    }//checkAlarm
    
    
       

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