Project tutorial
Arduino RTC LED Clock

Arduino RTC LED Clock © GPL3+

Make a Big LED clock with arduino and RTC module to make it as a Real Time Clock.

  • 2,242 views
  • 3 comments
  • 6 respects

Components and supplies

Necessary tools and machines

About this project

First You have to download following libraries(link is given end of this page)1. Wire.h

2. RTClib.hParts List

Watch the video

This is the RTC clock Module

This is the Arduino Circuit

RTC Wiring Connections

RTC Switches

Circuit Diagram (COMMON ANODE)

IF YOU USE COMMON CATHODE LED DO THE CHANGES AS FOLLOWS

POWER SUPPLY

Code

LED clock CODEsArduino
Download this code and upload to the project
/*
 4 digit 7 segment display: http://www.sparkfun.com/products/9483
 Datasheet: http://www.sparkfun.com/datasheets/Components/LED/7-Segment/YSD-439AR6B-35.pdf
  */
// modified connexion by niq_ro from http://nicuflorica.blogspot.com
// dataseet: http://www.tme.eu/ro/Document/dfc2efde2e22005fd28615e298ea2655/KW4-563XSA.pdf
// Code modified by BMIAK Basnayaka
// http://www.setnfix.com

int digit1 = 11; 
int digit2 = 10;
int digit3 = 9; 
int digit4 = 6;
int digit5 = 5; 
int digit6 = 3; 

//Pin mapping from Arduino to the ATmega DIP28 if you need it
//http://www.arduino.cc/en/Hacking/PinMapping
int segA = 0; //Display pin 11
int segB = 1; //Display pin 7
int segC = 2; //Display pin 4
int segD = 4; //Display pin 2
int segE = 7; //Display pin 1
int segF = 8; //Display pin 10
int segG = 12; //Display pin 5
int segDP =13; // Display pin 3



#include < Wire.h >
#include "RTClib.h"
RTC_DS1307 RTC;

// Date and time functions using a DS1307 RTC connected via I2C and Wire lib
// original sketck from http://learn.adafruit.com/ds1307-real-time-clock-breakout-board-kit/
// add part with SQW=1Hz from http://tronixstuff.wordpress.com/2010/10/20/tutorial-arduino-and-the-i2c-bus/
// add part with manual adjust http://www.bristolwatch.com/arduino/arduino_ds1307.htm



byte SW0 = A0;
byte SW1 = A2;
byte SW2 = A1;
byte SWT = A3;
int Adhr=0;
int Admnt=0;
int D = 0;
int Z =0;

// use for hexa in zecimal conversion
long zh, uh, ore;
long zm, um, miniti;

void setup() {
  
 //Serial.begin(57600);
  Wire.begin();
  RTC.begin();
 // RTC.adjust(DateTime(F(__DATE__), F(__TIME__)));
// if you need set clock... just remove // from line above this

// part code for flashing LED
Wire.beginTransmission(0x68);
Wire.write(0x07); // move pointer to SQW address
// Wire.write(0x00); // turns the SQW pin off
 Wire.write(0x10); // sends 0x10 (hex) 00010000 (binary) to control register - turns on square wave at 1Hz
// Wire.write(0x13); // sends 0x13 (hex) 00010011 (binary) 32kHz

Wire.endTransmission();
  
  
  pinMode(segA, OUTPUT);
  pinMode(segB, OUTPUT);
  pinMode(segC, OUTPUT);
  pinMode(segD, OUTPUT);
  pinMode(segE, OUTPUT);
  pinMode(segF, OUTPUT);
  pinMode(segG, OUTPUT);
  pinMode(segDP, OUTPUT);

  pinMode(digit1, OUTPUT);
  pinMode(digit2, OUTPUT);
  pinMode(digit3, OUTPUT);
  pinMode(digit4, OUTPUT);
  pinMode(digit5, OUTPUT);
  pinMode(digit6, OUTPUT);


//Serial.begin(9600);

pinMode(SW0, INPUT);  // N.O. push button switch
pinMode(SW1, INPUT);  // N.O. push button switch
pinMode(SW2, INPUT);  // N.O. push button switch
pinMode(SWT, INPUT);  // N.O. push button switch

digitalWrite(SW0, HIGH); // pull-ups on
digitalWrite(SW1, HIGH);
digitalWrite(SW2, HIGH);
digitalWrite(segDP, LOW);


}


void loop() {

  DateTime now = RTC.now();
  long HR = now.hour()*1000;
  long timp = (HR*10)+now.minute()*100+now.second();
  Adhr = now.hour();
  Admnt=now.minute();

int DIM = 0;

//------------------------------------------------------
//12/24 hours shitching 
//------------------------------------------------------
if (timp < 130000){
digitalWrite(segDP, LOW);}


if (digitalRead(SWT)==0){delay(300);
 if (D == 0) {
 D =1;delay(200);}
 
else{
D =0;}
}

if (D == 0){  
if (timp>=130000)
timp=timp-120000;
}

if ((D == 1)& (timp>=130000) ){ 
digitalWrite(segDP, LOW);}
else
{digitalWrite(segDP, HIGH);
}
//------------------------------------------------------


  



//int timp = (now.minute(), DEC);
//   displayNumber(12); // this is number to diplay


     
    for(int i = 100 ; i >0  ; i--) {
     if (timp >= 100000) displayNumber01(timp); 
     else displayNumber02(timp); 
   } 

   for(int i = 100 ; i >0  ; i--) {
     if (timp >= 100000) displayNumber03(timp); 
     else displayNumber04(timp); 
   } 

   for(int i = 100 ; i >0  ; i--) {
     if (timp >= 100000) displayNumber05(timp); 
     else displayNumber06(timp); 
   } 




  

if (digitalRead(SW0)==0){delay(100);Z=1;  set_time(); }// hold the switch to set time
}





void set_time()   {
  byte minutes1 = 0;
  byte hours1 = 0;
  byte minutes = 0;
  byte hours = 0;
  hours=Adhr;
  minutes=Admnt;

   // zh = hours / 16;
   // uh = hours - 16 * zh ;
   //ore = 10 * zh + uh; 
    //zm = minutes / 16;
    //um = minutes - 16 * zm ;
    //miniti = 10 * zm + um; 

    if ((hours & 0x0f) > 9) hours =  hours + 6;
      //Serial.print(hours & 0x0f);
      //Serial.print(hours);
      if (hours > 0x23) hours = 0;

        if ((minutes & 0x0f) > 9) minutes = minutes + 6;
      //Serial.println(minutes & 0x0f);
     // Serial.println(minutes);
      if (minutes > 0x59) minutes = 0;
      
while (!(Z==0)){ // set time switch must be released to exit


 


    
   int TST = digitalRead(SW2);
    while (TST==0) // set hours
    { 
     hours++;          
     
   // converting hexa in zecimal:
    zh = hours / 16;
    uh = hours - 16 * zh ;
    ore = 10 * zh + uh; 
    zm = minutes / 16;
    um = minutes - 16 * zm ;
    miniti = 10 * zm + um; 
    
     for(int i = 400 ; i >0  ; i--) {
     displayNumber01(ore*10000+miniti*100); 
     }
   
      
      if ((hours & 0x0f) > 9) hours =  hours + 6;
      //Serial.print(hours & 0x0f);
      //Serial.print(hours);
      if (hours > 0x23) hours = 0;
      //Serial.print("Hours = ");
      if (hours <= 9) //Serial.print("0");
      //Serial.println(hours, HEX);
    delay(1);
    TST = digitalRead(SW2);
    }

   while (!(digitalRead(SW1))) // set minutes
    { 
     minutes++;  
   // converting hexa in zecimal:
    zh = hours / 16;
    uh = hours - 16 * zh ;
    ore = 10 * zh + uh; 
    zm = minutes / 16;
    um = minutes - 16 * zm ;
    miniti = 10 * zm + um; 
    
     for(int i = 400 ; i >0  ; i--) {
     displayNumber01(ore*10000+miniti*100); 
     }

      //Serial.println(minutes);
      if ((minutes & 0x0f) > 9) minutes = minutes + 6;
      //Serial.println(minutes & 0x0f);
     // Serial.println(minutes);
      if (minutes > 0x59) minutes = 0;
      //Serial.print("Minutes = ");
      if (minutes >= 9) //Serial.print("0");
      //Serial.println(minutes, HEX);
    delay(1);    
    }

    Wire.beginTransmission(0x68); // activate DS1307
    Wire.write(0); // where to begin
    Wire.write(0x00);          //seconds
    Wire.write(minutes);          //minutes
    Wire.write(0x80 | hours);    //hours (24hr time)
    Wire.write(0x06);  // Day 01-07
    Wire.write(0x01);  // Date 0-31
    Wire.write(0x05);  // month 0-12
    Wire.write(0x09);  // Year 00-99
    Wire.write(0x10); // Control 0x10 produces a 1 HZ square wave on pin 7. 
    Wire.endTransmission();
  
    // converting hexa in zecimal:
    zh = hours / 16;
    uh = hours - 16 * zh ;
    ore = 10 * zh + uh; 
    zm = minutes / 16;
    um = minutes - 16 * zm ;
    miniti = 10 * zm + um; 

 
    
    for(int i = 400 ; i >0  ; i--) {
     displayNumber01(ore*10000+miniti*100); 
     }
delay(100); 
Serial.print(digitalRead(SW0));
if (digitalRead(SW0)==0) Z = 0;
 delay(300);   
  }
//Serial.print(SW2);
}



void displayNumber01(long toDisplay) {
#define DISPLAY_BRIGHTNESS  25

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW

  for(int digit = 6 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
     digitalWrite(digit1, DIGIT_ON);
     //digitalWrite(segDP, HIGH);
      break;
   case 2:
      digitalWrite(digit2, DIGIT_ON);
      //digitalWrite(segDP, LOW);
      break;
    case 3:
      digitalWrite(digit3, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 4:
      digitalWrite(digit4, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 5:
      digitalWrite(digit5, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 6:
      digitalWrite(digit6, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
      
    }
    lightNumber(toDisplay % 10);
    toDisplay /= 10;
    delayMicroseconds(DISPLAY_BRIGHTNESS); 


     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);
    digitalWrite(digit5, DIGIT_OFF);
    digitalWrite(digit6, DIGIT_OFF);
}
} 

void displayNumber02(long toDisplay) {
#define DISPLAY_BRIGHTNESS  25

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW

  for(int digit = 6 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
     lightNumber(10); 
     //digitalWrite(segDP, HIGH);
     break;
   case 2:
      digitalWrite(digit2, DIGIT_ON);
      //digitalWrite(segDP, LOW);
      break;
    case 3:
      digitalWrite(digit3, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 4:
      digitalWrite(digit4, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
     case 5:
      digitalWrite(digit5, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 6:
      digitalWrite(digit6, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    }
    lightNumber(toDisplay % 10);
    toDisplay /= 10;
    delayMicroseconds(DISPLAY_BRIGHTNESS); 

     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);
    digitalWrite(digit5, DIGIT_OFF);
    digitalWrite(digit6, DIGIT_OFF);
}
} 

void displayNumber03(long toDisplay) {
#define DISPLAY_BRIGHTNESS  25

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW

  for(int digit = 6 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
     digitalWrite(digit1, DIGIT_ON);
     //digitalWrite(segDP, HIGH);
      break;
   case 2:
      digitalWrite(digit2, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 3:
      digitalWrite(digit3, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 4:
      digitalWrite(digit4, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 5:
      digitalWrite(digit5, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 6:
      digitalWrite(digit6, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    }
    lightNumber(toDisplay % 10);
    toDisplay /= 10;
    delayMicroseconds(DISPLAY_BRIGHTNESS); 

     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);
    digitalWrite(digit5, DIGIT_OFF);
    digitalWrite(digit6, DIGIT_OFF);
}
} 

void displayNumber04(long toDisplay) {
#define DISPLAY_BRIGHTNESS  25

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW

  for(int digit = 6 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
     lightNumber(10); 
     //digitalWrite(segDP, HIGH);
     break;
   case 2:
      digitalWrite(digit2, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 3:
      digitalWrite(digit3, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 4:
      digitalWrite(digit4, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 5:
      digitalWrite(digit5, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 6:
      digitalWrite(digit6, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    }
    lightNumber(toDisplay % 10);
    toDisplay /= 10;
    delayMicroseconds(DISPLAY_BRIGHTNESS); 

     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);
    digitalWrite(digit5, DIGIT_OFF);
    digitalWrite(digit6, DIGIT_OFF);
}
} 

void displayNumber05(long toDisplay) {
#define DISPLAY_BRIGHTNESS  25

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW

  for(int digit = 6 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
     digitalWrite(digit1, DIGIT_ON);
     //digitalWrite(segDP, HIGH);
      break;
   case 2:
      digitalWrite(digit2, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 3:
      digitalWrite(digit3, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 4:
      digitalWrite(digit4, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 5:
      digitalWrite(digit5, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 6:
      digitalWrite(digit6, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    }
    lightNumber(toDisplay % 10);
    toDisplay /= 10;
    delayMicroseconds(DISPLAY_BRIGHTNESS); 

     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);
    digitalWrite(digit5, DIGIT_OFF);
    digitalWrite(digit6, DIGIT_OFF);
}
} 

void displayNumber06(long toDisplay) {
#define DISPLAY_BRIGHTNESS  25

#define DIGIT_ON  HIGH
#define DIGIT_OFF  LOW

  for(int digit = 6 ; digit > 0 ; digit--) {

    //Turn on a digit for a short amount of time
    switch(digit) {
    case 1:
     //digitalWrite(digit1, DIGIT_ON);
     //digitalWrite(segDP, HIGH);
      break;
   case 2:
      digitalWrite(digit2, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 3:
      digitalWrite(digit3, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 4:
      digitalWrite(digit4, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 5:
      digitalWrite(digit5, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    case 6:
      digitalWrite(digit6, DIGIT_ON);
      //digitalWrite(segDP, HIGH);
      break;
    }
    lightNumber(toDisplay % 10);
    toDisplay /= 10;
    delayMicroseconds(DISPLAY_BRIGHTNESS); 

     //Turn off all segments
    lightNumber(10); 

    //Turn off all digits
    digitalWrite(digit1, DIGIT_OFF);
    digitalWrite(digit2, DIGIT_OFF);
    digitalWrite(digit3, DIGIT_OFF);
    digitalWrite(digit4, DIGIT_OFF);
    digitalWrite(digit5, DIGIT_OFF);
    digitalWrite(digit6, DIGIT_OFF);
}
} 
//Given a number, turns on those segments
//If number == 10, then turn off number
void lightNumber(int numberToDisplay) {

#define SEGMENT_ON  HIGH
#define SEGMENT_OFF LOW

  switch (numberToDisplay){

  case 0:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_OFF);
    break;

  case 1:
    digitalWrite(segA, SEGMENT_OFF);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    break;

  case 2:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_ON);
    break;

  case 3:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_ON);
    break;

  case 4:
    digitalWrite(segA, SEGMENT_OFF);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    break;

  case 5:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    break;

  case 6:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    break;

  case 7:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    break;

  case 8:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_ON);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    break;

  case 9:
    digitalWrite(segA, SEGMENT_ON);
    digitalWrite(segB, SEGMENT_ON);
    digitalWrite(segC, SEGMENT_ON);
    digitalWrite(segD, SEGMENT_ON);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_ON);
    digitalWrite(segG, SEGMENT_ON);
    break;

  // all segment are ON
  case 10:
    digitalWrite(segA, SEGMENT_OFF);
    digitalWrite(segB, SEGMENT_OFF);
    digitalWrite(segC, SEGMENT_OFF);
    digitalWrite(segD, SEGMENT_OFF);
    digitalWrite(segE, SEGMENT_OFF);
    digitalWrite(segF, SEGMENT_OFF);
    digitalWrite(segG, SEGMENT_OFF);
    break;
  
  }
// End of the coding, BUDHUSARANAI, Best of luck.
  
}

Schematics

SSD Circuit
This is the wiring of SSD with LED
5555555 page 0 gzfnyhtayf

Comments

Similar projects you might like

Digital And Binary Clock With Two LED Matrix And RTC

Project tutorial by LAGSILVA

  • 13,073 views
  • 41 comments
  • 46 respects

Digital Clock with Arduino, RTC and Shift Register 74HC595

Project tutorial by LAGSILVA

  • 34,126 views
  • 26 comments
  • 76 respects

RTC Based Clock

Project tutorial by shivakumarj1995

  • 14,616 views
  • 15 comments
  • 18 respects

Tri-Mode Digital Clock with ATtiny85 and RTC

Project tutorial by LAGSILVA

  • 8,899 views
  • 4 comments
  • 25 respects

Digital & Binary Clock In 8 Digits x 7 Segments LED Display

Project tutorial by LAGSILVA

  • 3,611 views
  • 3 comments
  • 11 respects

Simple Arduino Digital Clock Without RTC

Project in progress by Annlee Fores

  • 124,401 views
  • 32 comments
  • 113 respects
Add projectSign up / Login