Project I - 19 Digital Clock using LED Matrix P10 Module (Arduino Based)

Digital Clock using LED Matrix P10 Module

Build a digital clock with Matrix P10 LED based on Arduino UNO. LED Matrix P10 is now often used for displays such as text display (moving sign / running text). In addition to practical, LED module Matrix P10 is also flexible to development. Just adjust to the size of writing / display that we will make.

Hardware Requirement

• LED Matrix P10 Module
• Arduino UNO
• Power supply +5 Volt
• RTC DS1307 Module

                                           

LED Matrix P10 Module | Source | Source

           

Modul RTC DS1307 | Source

Schematic

Arduino - LED Matrix P10 (DMD) Wiring

Arduino - RTC DS1307 Wiring

Source Code/Sketch

#include <Wire.h>
#include <DS1307.h>
#include <SPI.h>
#include <DMD.h>
#include <TimerOne.h>
#include "SystemFont5x7.h"
#define DISPLAYS_ACROSS 1
#define DISPLAYS_DOWN 1
DMD dmd(DISPLAYS_ACROSS, DISPLAYS_DOWN);
int a;
char b[8];
String str;
void ScanDMD()
{
dmd.scanDisplayBySPI();
}
void setup()
{
RTC.stop();
RTC.start();
Serial.begin(9600);
Timer1.initialize( 5000 );
Timer1.attachInterrupt( ScanDMD );
dmd.clearScreen( true );
}
void loop()
{
str="";
int h(RTC.get(DS1307_HR,true));
int m(RTC.get(DS1307_MIN,false));
dmd.clearScreen( true );
str=String(h)+":"+String(m);
str.toCharArray(b,6);
dmd.selectFont(SystemFont5x7);
dmd.drawString( 1, 4, b, 5, GRAPHICS_NORMAL );
delay(5000);
}

How it Works

Digital clock will be shown on the LED Matrix P10 module with interesting view

Download the required file.