Arduino Smile MAX7219 Matrix LED Tutorial

In this tutorial "Controlling a Led Matrix Using Arduino". I show you how to use Led matrix displays using Arduino.

And in this article, we will learn to make smile emoticons using this matrix display using Arduino too.

The ingredients used are still the same as the previous article. so right away we start the tutorial.

this is a list of the components needed:

• Led Matrik
• Arduino Nano
• Jumper Wire
• USBmini
• Project Board

Required library:

• LedControl

To assemble the components see the schematic drawing above, you can also see the information below:

Led Matrix to Arduino

VCC ==> +5V

GND ==> GND

DIN ==> D6

CS ==> D7

CLK ==> D8

After completing the component assembly, proceed to the programming process.

Use the code below to make a smile emoticon in the dot matrix:

#include "LedControl.h"
/*
 Now we need a LedControl to work with.
 ***** These pin numbers will probably not work with your hardware *****
 pin 6 is connected to the DataIn 
 pin 8 is connected to the CLK 
 pin 7 is connected to LOAD 
 We have only a single MAX72XX.
 */
LedControl lc=LedControl(6,7,8,1);
unsigned long delaytime=100;
void setup() {
   lc.shutdown(0,false);
   lc.setIntensity(0,8);
   lc.clearDisplay(0);
}
void smile(){
   byte a[8]={B00000000,B01100110,B01100110,B00000000,B00000000,B01000010,B00111100,B00000000};
  lc.setRow(0,0,a[0]);
  lc.setRow(0,1,a[1]);
  lc.setRow(0,2,a[2]);
  lc.setRow(0,3,a[3]);
  lc.setRow(0,4,a[4]);
  lc.setRow(0,5,a[5]);
  lc.setRow(0,6,a[6]);
  lc.setRow(0,7,a[7]);
}
void loop() { 
  smile();
 
}

For the results can be seen in the picture above.