MAX7219 LED Matrix Display Interfacing With Arduino

MAX7219 LED Matrix Display Arduino Walkthrough & Test Code – Scrolling Text Code

MAX7219 LED Matrix Display

There are many different kinds of these modules floating around. Although they are all using the same driver (MAX7219), they have their own settings. The one I picked up for myself can be found below and features four distinct modules. Each module has a driver & an LED matrix on it. These modules are extremely versatile and allow the user to chain as many as needed through a functionality similar to Shift Resister. Simply connect the headers and your text will keep on scrolling.

Hardware & Software for the Project

You are going to need a few things for the project; you can find them through the following links:
  • Arduino Uno
  • MAX7219 Dot Matrix Module 
  • Breadboard 
  • Jumper Cables 

MAX7219 Display Parola example

The second example is slightly more complex. It allows the user to enter a text string through the serial monitor and will output the said string through the LED matrix display. The file can be found through the title “MD_MAX72_Message”.

Code not included here, but can be found under examples of the library

This example has many similarities to the previous one when it comes to the display. However, an important feature is added which allows you to communicate to the Arduino through the Serial Port. Once the string is read by the micro controller, it is sent out to the MAX7219 LED Matrix Display. Browse through the code and feel free to post your questions on the forum should you encounter any difficulties with it.

Circuit Diagram


library : -

#include <MD_Parola.h>

#include <MD_MAX72xx.h>