Arduino Alarm Clock with Temperature sensor

Hello Friends,

       
         If you make alarm clock please read it carefully because of some important things you have to follow for your device safety.



CIRCUIT DIAGRAM

for library

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SOURCE CODE 
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#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DS1302.h>


LiquidCrystal_I2C lcd(0x3F, 16, 2);

int Hour;
int Min;
int pset = 8; // pushbutton for setting alarm
int phour = 9; // pushbutton for hour
int pmin = 10; // pushbutton for minutes
int pexit = 11; // pushbutton for exit of set alarm
int buzzer = 6;
int h;
int m;
int buttonforset = 0; // pushbutton state for setting alarm
int buttonforhour = 0; // pushbutton state for hour
int buttonformin = 0;// pushbutton state for minutes
int buttonforexit = 0; // pushbutton state for exit of set alarm
int activate=0;
float temp;

Time t;


DS1302 rtc(2, 3, 4);

void setup()
{
 pinMode(pset, INPUT);
 pinMode(phour, INPUT);
 pinMode(pmin, INPUT);
 pinMode(pexit, INPUT);

 rtc.halt(false);
 rtc.writeProtect(false);


 lcd.begin();

// using following lines set time  and upload program on your bord after uploading again convert below lines in comments and again upload it
 //rtc.setDOW(SATURDAY); // Set Day-of-Week
 //rtc.setTime(10, 0, 0); // Set the time
 //rtc.setDate(11, 11, 2017); // Set the date
}

void loop()
{

  temp = analogRead(A0); //Reading the value from the analog input

  temp = temp * 0.48828125; //Sensor calibration to get the real value

  lcd.clear();


    lcd.setCursor (11,0);

 

    lcd.print(" C"); //Celsius of course :D

 

     delay(1000); //Refresh every 1s




 if (activate == 0) {

// Display time value on the right conrner upper line
 lcd.setCursor(0, 0);

 lcd.print(rtc.getTimeStr());

 // Display abbreviated Day-of-Week in the lower right corner
 lcd.setCursor(14, 1);
 lcd.print(rtc.getDOWStr(FORMAT_SHORT));

 // Display date in the lower left corner
 lcd.setCursor(0, 1);

 lcd.print(rtc.getDateStr());
 t = rtc.getTime();
 Hour = t.hour;
 Min = t.min;
 buttonforset = digitalRead(pset);
 } // setting button pressed
 if (buttonforset == HIGH) {
 activate =1;
 lcd.clear(); }
 while(activate== 1){
 lcd.setCursor(0,0);
 lcd.print("Set Alarm");
 lcd.setCursor(0,1);
 lcd.print("Hour= ");
 lcd.setCursor(9,1);
 lcd.print("Min= ");
 buttonforhour = digitalRead(phour); // set hour for alarm
 if (buttonforhour == HIGH){
 h++;
 lcd.setCursor(5,1);
 lcd.print(h);
 if (h>23){

 h=0;
 lcd.clear(); }
 delay(100);
 }
 buttonformin = digitalRead(pmin); // set minutes for alarm
 if (buttonformin == HIGH){
 m++;
 lcd.setCursor(13,1);
 lcd.print(m);
 if (m>59){
 m=0;
 lcd.clear();}
 delay(100);
 }

lcd.setCursor(5,1);
 lcd.print(h);
 lcd.setCursor(13,1);
 lcd.print(m);
 buttonforexit = digitalRead(pexit); // exit from set alarm mode
 if (buttonforexit == HIGH){
 activate = 0;
 lcd.clear();
 }
 }

 if (Hour== h && Min== m) {
   int i=0;

 do{
  i++;
  tone(6,450);
  delay(70);
  noTone(6);
  delay(60);
  }
  while(i<4);
delay(700);

 }

 }
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Follow steps:
>first connect RTC modual to the Arduino
    
        |__follow this during upload code
              > //rtc.setDOW(SATURDAY); // Set Day-of-Week
                   //rtc.setTime(10, 0, 0); // Set the time                 
                   //rtc.setDate(11, 11, 2017); // Set the date           
                   In this three line first remove ' // ' and set time and upload code,
                   after upload code again make this three line as comments by add ' // ' 
                   before line.and upload code again \
why do this operation ?
>when you upload first time code Time is set in the RTC, but when you reset your arduino bord Time is again set at your first upload Time everytime .that's you have to upload code again with making that three line as comment.

>after doing above steps connect all components as per diagram, and test your system. 


IF YOU HAVE ANY QUERY PLEASE ASK IN COMMENT.