Digital Clock with 8 digits 7 Segment Module (without RTC)

Disini kita akan belajar membuat sebuah Jam Digital sederhana,karena hanya membutuhkan 1 unit 8 digit Seven Segmen (dengan 1 IC Max7219) dan Sebuat controller Arduino (Uno/Nano/Pro mini).

Disini kita dapat menambah kan Opsi 3 buat push button sebagai tombol setting manual Jam nya.

Berikut bahan-bahan yang kita butuhkan :

1unit Arduino Uno atau Arduino Nano atau Arduino Pro mini

1unit display Seven Segment 8digit Max7219

3buah tombol Push button

beberapa helai kabel jumper duppon

https://www.tokopedia.com/rajacell/digital-tube-display-module-8-x-7-segment-max7219-for-arduino

Schematic 8 Digits 7 Segment Display dengan Single Controller Max7219

Schematic 3 Push Button Active Low

Library Arduino yang kita butuhkan :

Library Segment Led Controller download disini atau download disini.

Library Push Button download disini.

Extract dan masukan Library yang dibutuhkan diatas (salah satu saja) ke dalam folder Libraries Arduino (master foldernya saja)
Windows 64bit : C:\ Program Files (x86) \ Arduino \ libraries
Windows 32bit : C:\ Program Files \ Arduino \ libraries

Wiring Arduino dengan Display Segment :

wiring Module Display 8digit 7segment ke Arduino (Uno)// Arduino Pin D12 to DIN 8digit 7segment

// Arduino Pin D11 to CLK 8digit 7segment
// Arduino Pin D10 to CS 8digit 7segment
// Arduino Pin 5V to VCC 8digit 7segment

// Arduino Pin GND to GND 8digit 7segment

Wiring Arduino dengan Display Segment :

wiring Module Push Button ke Arduino (Uno)

// Arduino Pin D4 to Push Button SETUP

// Arduino Pin D3 to Push Button (+) increase digit

// Arduino Pin D2 to Push Button (-) decrease digit

// Arduino Pin GND disambungkan dengan Common pin push button

(lihat schematic Push button diatas untuk lebih jelasnya)

kita tidak perlu memberikan Resistor Pull-Up seperti pada gambar karena kita akan memakai

internal R Pullup milik Digital Pin Arduino.

Dani's Simple Digital Clock Sourche Code

Copy paste sourche code dibawah ini ke dalam Arduino IDE kemudian upload ke Arduino Board Anda. Anda juga bisa download .ino file nya disini.

#include "LedControl.h" //Memanggil library Led Control
#include <Button.h> //Memanggil library Push Button

//wiring Module Display 8digit 7segment ke Arduino (Uno)
// Arduino Pin D12 to DIN, 
// Arduino Pin D11 to CLK, 
// Arduino Pin D10 to CS, 
// No.of devices is 1 (Display Urutan ke 1)

//Setup Tombol Setting
#define DN_PIN 2 //Decrease Button
#define UP_PIN 3 //Increase Button
#define SET_PIN 4  //Setup Button
#define PULLUP true //Mengaktifkan internal Pull Up
#define INVERT true 
#define DEBOUNCE_MS 20     
#define REPEAT_FIRST 500 
#define REPEAT_INCR 100 

//Declare push buttons
Button btnUP(UP_PIN, PULLUP, INVERT, DEBOUNCE_MS);    
Button btnDN(DN_PIN, PULLUP, INVERT, DEBOUNCE_MS);
Button btnSET(SET_PIN, PULLUP, INVERT, DEBOUNCE_MS);
//////////////////////////////////////////
//     Example by Dani Rajacell         //
//  Mohon tetap mencantumkan sumber     //
//apabila menggunakan example kode ini  //
//////////////////////////////////////////
LedControl lc=LedControl(12,11,10,1); // DIN,CLK,CS,No.
enum {WAIT, INCR, DECR};              //The possible states for the state machine
uint8_t STATE;                        //The current state machine state
int count;                            //The number that is adjusted
int lastCount = -1;                   //Previous value of count (initialized to ensure it's different when the sketch starts)
unsigned long rpt = REPEAT_FIRST;     //A variable time that is used to drive the repeats for long presses

//Variable penyimpan logika setup
uint8_t setMode = 8;
uint8_t setRun = 0;

//Pengambilan waktu dari compiller
uint32_t targetTime = 0;
uint8_t conv2d(const char* p) {
uint8_t v = 0;
  if ('0' <= *p && *p <= '9')
   v = *p - '0';
  return 10 * v + *++p - '0';
}

//Mengambil waktu jam dari waktu Compiler Arduino IDE
uint8_t hh = conv2d(__TIME__), mm = conv2d(__TIME__ + 3), ss = conv2d(__TIME__ + 6);
uint8_t hh1 = hh%10, mm1 = mm%10, ss1 = ss%10; // mengambil digit kedua
uint8_t hh2 = (hh%100)/10, mm2 = (mm%100)/10, ss2 = (ss%100)/10; // mengambil digit pertama

void setup()
{
  //Serial.begin (115200);
  // Initialize the MAX7219 device
  // Kondisi default Max7219 saat power ON adalah Standby jadi harus kita aktifkan dulu...
  lc.shutdown(0,false);   // Enable display
  lc.setIntensity(0,12);  // Set brightness level (Level Kecerahan : 0 sampai 15)
  writeRJC();
  lc.clearDisplay(0);     // Clear display register (Mengkosongkan tampilan segment)
}
//////////////////////////////////////////
//     Example by Dani Rajacell         //
//  Mohon tetap mencantumkan sumber     //
//apabila menggunakan example kode ini  //
//////////////////////////////////////////
void loop(){
if (targetTime < millis()) {
    targetTime = millis() + 1000;
    
    ss1++;              // Advance second
    if (ss1 == 10) {
      ss1 = 0;
      ss2++;
      if (ss2 == 6) {
      ss2 = 0;
      mm1++;            // Advance minute
      if (mm1 == 10) {
        mm1 = 0;
        mm2++;
        if (mm2 == 6) {
        mm2 = 0;
        hh1++;          // Advance hour
        if (hh1 == 10) {
          hh1 = 0;
          hh2++;}
        if (hh2>=2 && hh1>=4) {
          hh2=0;
          hh1=0;
        }
       }
      }
     }
    }
   }
  
  lc.setDigit(0,7,hh2,false);
  lc.setDigit(0,6,hh1,false);
  lc.setChar(0,5,'-',false);
  lc.setDigit(0,4,mm2,false);
  lc.setDigit(0,3,mm1,false);
  lc.setChar(0,2,'-',false);
  lc.setDigit(0,1,ss2,false);
  lc.setDigit(0,0,ss1,false);

setupClock ();

}
//////////////////////////////////////////
//     Example by Dani Rajacell         //
//  Mohon tetap mencantumkan sumber     //
//apabila menggunakan example kode ini  //
//////////////////////////////////////////
void setupClock (void) {
   btnUP.read();                             //read the buttons
   btnDN.read();
   btnSET.read();
    
    if (hh2==2 && hh1>3){hh1=0;}
    if (setMode==2){setMode=3;}
    if (setMode==5){setMode=6;}
    if (setMode == 9){writeSetup(); setMode = 0; setRun=1;}
    if (setMode == 8 && setRun == 1){writeFinish(); setRun=0;}
    lc.setLed(0,setMode,0,true);
    switch (STATE) {
        
        case WAIT:                                //wait for a button event
            if (btnSET.wasPressed())
               { setMode = setMode+1; if (setMode == 10)setMode=0;}
            if (btnUP.wasPressed())
                STATE = INCR;
            else if (btnDN.wasPressed())
                STATE = DECR;
            else if (btnUP.wasReleased())         //reset the long press interval
                rpt = REPEAT_FIRST;
            else if (btnDN.wasReleased())
                rpt = REPEAT_FIRST;
            else if (btnUP.pressedFor(rpt)) {     //check for long press
                rpt += REPEAT_INCR;               //increment the long press interval
                STATE = INCR;
            }
            else if (btnDN.pressedFor(rpt)) {
                rpt += REPEAT_INCR;
                STATE = DECR;
            }
            break;

        case INCR:                                //increment the counter
            if (setMode==1 && ss2<5)ss2=ss2+1;
            if (setMode==0 && ss1<9)ss1=ss1+1;
            if (setMode==4 && mm2<5)mm2=mm2+1;
            if (setMode==3 && mm1<9)mm1=mm1+1;
            if (setMode==7 && hh2<2)hh2=hh2+1;
            if (setMode==6 && hh1<9 && hh2<2)hh1=hh1+1;  
            if (setMode==6 && hh1<3 && hh2==2)hh1=hh1+1;           
            
            STATE = WAIT;
            break;

        case DECR:                                //decrement the counter
            if (setMode==1 && ss2>0)ss2=ss2-1;
            if (setMode==0 && ss1>0)ss1=ss1-1;
            if (setMode==4 && mm2>0)mm2=mm2-1;
            if (setMode==3 && mm1>0)mm1=mm1-1;
            if (setMode==7 && hh2>0)hh2=hh2-1;
            if (setMode==6 && hh1>0)hh1=hh1-1;
            
            STATE = WAIT;
            break;
    }
}
//////////////////////////////////////////
//     Example by Dani Rajacell         //
//  Mohon tetap mencantumkan sumber     //
//apabila menggunakan example kode ini  //
//////////////////////////////////////////
void writeSetup() {
  lc.setDigit(0,7,5,false);
  lc.setChar(0,6,'e',false);
  lc.setRow(0,5,B00001111);
  lc.setRow(0,4,B00111110);
  lc.setChar(0,3,'p',false);
  lc.setChar(0,2,'-',false);
  lc.setChar(0,1,'-',false);
  lc.setChar(0,0,'-',false);
  delay(1000); 
  if(ss1<9)ss1=ss1+1;
  lc.clearDisplay(0);
} 

void writeFinish() {
  lc.setRow(0,7,B01000111);
  lc.setRow(0,6,B00110000);
  lc.setRow(0,5,B00010101);
  lc.setRow(0,4,B00110000);
  lc.setDigit(0,3,5,false);
  lc.setRow(0,2,B00010111);
  lc.setChar(0,1,'-',false);
  lc.setChar(0,0,'-',false);
  delay(1000); 
  if(ss1<9)ss1=ss1+1;
  lc.clearDisplay(0);
} 

void writeRJC() {
  lc.setRow(0,7,B11000110);
  lc.setRow(0,6,B11111101);
  lc.setRow(0,5,B10111000);
  lc.setRow(0,4,B11111101);
  lc.setRow(0,3,B11001110);
  lc.setRow(0,2,B11101111);
  lc.setRow(0,1,B10001110);
  lc.setRow(0,0,B10001110);
  delay(2000); 
  lc.clearDisplay(0);
}