Arduino Alarm Clock

This is an Alarm Clock powered by Arduino. It keeps track track of time down to the seconds. Once the alarm time is reached, the alarm goes off for one minute, then shuts off automatically.

For this project you will need a couple things,
Arduino Uno
16 pin LCD screen
Buzzer
Potentiometer
DS3231 RTC
Breadboard
Jumper Wires

First you need to wire everything together. Here is the circuit diagram and A picture of my project.

Pasted below is the code to the project, upload this to the arduino and un comment the time you need to set.

#include

#include

#include

LiquidCrystal lcd(2, 3, 4, 5, 6, 7);

DS3231 rtc(SDA, SCL);

Time t;

#define buz 11

int Hor;

int Min;

int Sec;




void setup()

{

Wire.begin();

rtc.begin();

Serial.begin(9600);

pinMode(buz, OUTPUT);

lcd.begin(16,2);

lcd.setCursor(0,0);

lcd.print("DIYHacking.com");

lcd.setCursor(0,1);

lcd.print("Arduino Alarm ");

// The following lines can be uncommented to set the date and time

//rtc.setDOW(WEDNESDAY); // Set Day-of-Week to SUNDAY

//rtc.setTime(12, 0, 0); // Set the time to 12:00:00 (24hr format)

//rtc.setDate(1, 1, 2014); // Set the date to January 1st, 2014

delay(2000);

}




void loop()

{

t = rtc.getTime();

Hor = t.hour;

Min = t.min;

Sec = t.sec;

lcd.setCursor(0,0);

lcd.print("Time: ");

lcd.print(rtc.getTimeStr());

lcd.setCursor(0,1);

lcd.print("Date: ");

lcd.print(rtc.getDateStr());




if( Hor == 11 && (Min == 32 || Min == 33)) //Comparing the current time with the Alarm time

{

Buzzer();

Buzzer();

lcd.clear();

lcd.print("Alarm ON");

lcd.setCursor(0,1);

lcd.print("Alarming");

Buzzer();

Buzzer();

}

delay(1000);

}




void Buzzer()

{

digitalWrite(buz,HIGH);

delay(500);

digitalWrite(buz, LOW);

delay(500);

}