Arduno Clock

 

Arduino Clock

This is a clock using RTC Tiny with Arduino. Using this we can see time & date. 

FOR VIDEO :

THING'S NEEDED

1. Arduino UNO R3
2. LCD Display (I2C)
3. DS 1307 RTC Tiny

CIRCUIT DIAGRAM

WIRING

RTC TO ARDUINO

• Connect VCC of RTC to 5V of Arduino.
• Connect GND of RTC to GND of Arduino.
• Connect SCL of RTC to A5 of Arduino.
• Connect SDA of RTC to A4 of Arduino.

LCD TO ARDUINO

• Connect the GND of LCD to GND of Arduino.
• Connect the VCC of LCD to 5V of Arduino.
• Connect the SDA of LCD to A4 of Arduino.
• Connect the SCL of LCD to A5 of Arduino.

CODE

#include <Wire.h>  

#include "RTClib.h"  

#include<LiquidCrystal_I2C.h>  

LiquidCrystal_I2C lcd(0x27, 16, 2); 

char DayoftheWeek[7][12] = {"SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"};

RTC_DS1307 rtc;  

void setup() {

  Serial.begin(9600);

  lcd.init();

  lcd.backlight(); 

  if (!rtc.begin())

  {

    lcd.print("Error RTC");

    while (1);

  }

  if (!rtc.isrunning())

  {

    lcd.print("RTC is not running");

  }

  rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));  // time auto update from computer

  // rtc.adjust(DateTime(2019, 12,27, 12,0,0);  //  year, month, date, hour, minut, second

}

void loop() {

  DateTime now = rtc.now();  // get time from rtc

  int PM_Hrs;

  int AM_Hrs;

  int Hour;

  

  PM_Hrs = now.hour() - 12;

  AM_Hrs = now.hour();

if (now.hour() < 12){

Hour = AM_Hrs ;

lcd.setCursor(11,0);

lcd.print("AM");

}

if (now.hour() > 12){

Hour = PM_Hrs ;

lcd.setCursor(11,0);

lcd.print("PM");

}

  lcd.setCursor(0, 0);

  lcd.print("   ");

  lcd.print(Hour);

  lcd.print(":");

  lcd.print(now.minute());

  lcd.print(":");

  lcd.print(now.second());

  lcd.setCursor(0, 1);

  lcd.print(" ");

  lcd.print(DayoftheWeek[now.dayOfTheWeek()]);

  lcd.print(",");

  lcd.print(now.day());

  lcd.print("/");

  lcd.print(now.month());

  lcd.print("/");

  lcd.print(now.year());

}

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