Introduction: DIY Arduino LED Matrix Display - 80x8 Px

In this instructables guide I will show you how to make your own Arduino LED Matrix display!

Main Features:

  • Time
  • Day of the week
  • Date
  • Temperature and Humidity
  • Ticker Text
  • Adjustable brightness level
  • Bluetooth communication

Can be controlled from your Android phone or Windows computer!

Watch it in action:

Official project page and future updates can be found here:

Let's get started!!!

Step 1: What You Will Need - Hardware

For this project you will need:

For the case-box you will need:

Use black - transparent plexiglass, 3mm thickness:

  • 2pcs 33x4 cm
  • 2pcs 33x6 cm
  • 2pcs 6.6x4.6 cm (left and right)

Optional, if you have a 3d printer you can print the left and right side (attached .stl files).

Step 2: The Circuit


8x8 MAX7219 LED Matrix Display module:

  • Vcc - 5VGND - GND
  • DIN -From the last one to Arduino pin 10
  • CLK - Arduino Pin 13
  • CS - Arduino Pin 11
  • DOUT - to previous DIN as the schematic


  • Vcc - 5V
  • Data - Arduino pin 9
  • ---
  • GND - GND


  • Vcc - 5V
  • GND - GND
  • RX - Arduino Pin 3
  • TX - Arduino Pin 4

RTC DS1307 Module

  • Vcc - 5V
  • SDA - Arduino pin A4
  • SCL - Arduino pin A5


  • As the schematic, to Arduino pin A0

Step 3: The Code

Download the code from here and open it with Arduino IDE. Inside you will also find all necessary libraries.

Step 4: Software and Configuration Protocol

From here you can download the software for windows os.

The application for Android devices will be soon available.

If you want you can make your own application, or make an app for a different operation system.

Bellow you will find the protocol that we are using.

Configuration protocol:

For time and date send: HH:MM:SS dd/mm/yyyy>

For ticker text send: Your Text Here>

For brightness level send: Auto> or value> (value from 1 to 16)

Step 5: Android Application

Download it from Android PlayStore

Features of current version:
-Update time and date with your device clock

-Update brightness level

-16 available levels (set to 0 for automatic adjustment)

-Change the ticker (scrolling) text (set to blank to deactivate it)

How to use it:

Turn on Bluetooth and pair your display. The default name of the Bluetooth module is "HC-06" or "HC-05" and usually the password is "1234". Now open the application, press the "Load Paired Devices" button and select your BT module. (see also the video)

Note: If you can't establish a connection with your LED Matrix Display, just restart it.

If you have any problem with this application just send me an email.

For android ver. >4.4, screen size >4.5"

Step 6: Well Done!

That's it!

I hope you liked this, let me know in the comments!

I would also like to see some photos with your new Arduino LED Matrix display!

Microcontroller Contest 2017

Participated in the
Microcontroller Contest 2017