Project V - 39. Countdown Timer with Panel Matrix P10 Module (Arduino Based)

Countdown Timer with Panel Matrix P10 Module

This tool serves as a delay of time (pause) between adzan and iqomah (or you can apply for the other function. For example, if the delay is set to 5 minutes then the timer will counting down from minute 5 to 0. In another hand, this tool use Matrix panel P10 as the display.

Hardware Requirement

• Arduino Uno Board
• LED Dot Matrix P10 Module
• Push button
• Power supply +5 Volt
• Jumper

LED Matrix P10 Module| Source

 Schematic

Arduino - LED Matrix P10 Wiring

Source Code/Sketch

Source Code/Sketch

#include <SPI.h>
#include <DMD.h>
#include <TimerOne.h>
#include "SystemFont5x7.h"
#include "Arial_black_16.h"
#define DISPLAYS_ACROSS 1
#define DISPLAYS_DOWN 1
DMD dmd(DISPLAYS_ACROSS, DISPLAYS_DOWN);
int menit,detik,i;
char b[8];
String str;
void ScanDMD()
{
dmd.scanDisplayBySPI();
}
void setup()
{
Serial.begin(9600);
Timer1.initialize( 5000 );
Timer1.attachInterrupt( ScanDMD );
dmd.clearScreen( true );
pinMode(2,INPUT);
digitalWrite(2,HIGH);
}
void loop()
{
str="";
menit=2;
while(digitalRead(2));
i=1;
while(i){
if(detik>0){
detik--;
}
else if(detik==0){
detik=59;
if(menit>0){
menit--;
}
else if(menit==0){
detik=0;
i=0;
}
}
dmd.clearScreen( true );
str=String(menit)+":"+String(detik);
str.toCharArray(b,6);
dmd.selectFont(Arial_Black_16);
dmd.drawString( 0, 1, b, 5, GRAPHICS_NORMAL );
delay(1000);
}
}

How it Works

1. Connect the Arduino with Peripherals needed
2. Plug in the Power Source on the device
3. Compile and upload the script program above to your arduino
4. Press the (START) button (push button) connected with pin 2 Arduino. The timer will start 
   running. In this example a 2 minute pause is made. You can change the timer in the code easily



Video for Project V - 39. Countdown Timer with Panel Matrix P10 Module (Arduino Based)

Required File