The MAX7219 4-in-1 Dot Matrix Module is a powerful, versatile display solution for makers and engineers. At Electrapac, we recommend this module for projects that require clear, scrolling text or custom animations without the complexity of wiring dozens of individual LEDs.

Product Overview

This module combines four 8 x 8 LED matrices into a single, cohesive 32 x 8 display. It is powered by the MAX7219 serial input/output common-cathode display driver. Because the driver handles the multiplexing internally, your microcontroller (like an Arduino) only needs to use 3 data pins to control all 256 LEDs.

Key Features for Electrapac Customers

• Chainable Design: The module features input pins on one side and output pins on the other. You can link multiple 4-in-1 units together to create an even longer display (64 x 8 or 128 x 8) without using extra pins on your Arduino.

• Integrated Driver: The MAX7219 chip takes care of the "heavy lifting" (multiplexing and current limiting), ensuring uniform brightness across all LEDs.

• Brightness Control: The intensity of the LEDs can be adjusted via software, allowing you to dim the display for night use or brighten it for daylight visibility.

• Single-Row Layout: The sleek, horizontal form factor is perfect for scrolling "ticker" tapes, digital clocks, and status messages.

• Includes 5P Line: Every module from Electrapac comes with a 5-pin female-to-female DuPont cable, making it ready to plug into your project immediately.

Pin Configuration & Connection Guide

To get your display running, connect the module to your microcontroller using these pins:

1. VCC: Connect to +5V.

2. GND: Connect to Ground.

3. DIN (Data In): Connect to a Digital Pin (e.g., Arduino Pin 11).

4. CS (Chip Select): Connect to a Digital Pin (e.g., Arduino Pin 10).

5. CLK (Clock): Connect to a Digital Pin (e.g., Arduino Pin 13).

Electrapac Tech Tip: For the best coding experience, use the "MD_Parola" or "LedControl" libraries in the Arduino IDE. These libraries make scrolling text and custom character generation incredibly simple.

Primary Applications

• Digital Clocks: Displaying time, date, and temperature in a modern, retro-tech style.

• Information Tickers: Scrolling live stock prices, news headlines, or social media notifications.

• Robotics: Adding "facial expressions" or status eyes to your robot.

• Scoreboards: Keeping track of points for tabletop games or sports.

• Industrial Monitoring: Displaying real-time sensor data like "CO2 Levels" or "System OK" in a workshop.

Why Shop at Electrapac?

We test our MAX7219 Modules to ensure all 256 LEDs are fully functional and the headers are soldered straight for easy cascading. Visit us at for the visual components that give your data a voice.