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Matrix 8x8 LED Dot Display Module MAX7219

The MAX7219 LED Matrix Module is a compact and efficient display driver solution designed to interface microcontrollers with LED displays such as 7-segment displays, bar graphs, and 8 x 8 LED dot matrices. Based on the MAX7219 integrated circuit, the module manages multiplex scanning, constant current regulation, and display data storage internally, significantly reducing software complexity and wiring requirements. it communicates using a simple four-wire serial interface, making it compatible with Arduino, ESP8266, ESP32, and many other microcontroller platforms. The module supports cascading, allowing multiple units to be connected together for extended displays such as scrolling text panels, counters, clocks, and status indicators. Built-in brightness control and low-power shutdown mode make it suitable for both portable and fixed installations.

Package Includes

  • 1 x MAX7219 LED Matrix Module


14.95 AED 14.95 AED (Tax included)

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Features

  • Integrated MAX7219 LED driver for direct microcontroller control
  • Supports 8 x 8 LED matrices, 7-segment displays, and bar graph displays
  • B-type BCD encoder and multi-channel scan loop integrated on-chip
  • Onboard RAM for storing display data
  • Four-wire serial interface using minimal I/O pins
  • Adjustable brightness via software control
  • Low-power shutdown mode
  • Supports cascading multiple modules
  • Compact PCB with mounting holes for secure installation

Specifications

  • Driver IC: MAX7219
  • Display Type: 8 x 8 common cathode LED matrix
  • Operating Voltage: 5V DC
  • Interface: Serial (DIN, CS, CLK)
  • Cascade Support: Yes
  • Module Dimensions: 3.2 cm x 3.2 cm x 1.3 cm

Pinout

MAX7219 LED Matrix Module: Specs, Pinout, Application, Datasheet, Interfacing, and Applications

Pin Description
VCC Power supply pin, connect to +5V
GND Ground pin
DIN Serial data input
CS Chip select pin
CLK Serial clock pin

Arduino Library

For easy control of the MAX7219 module with Arduino, it is recommended to use the LedControl library.

  1. Open Arduino IDE
  2. Go to Sketch > Include Library > Manage Libraries
  3. Search for LedControl
  4. Install the library by Eberhard Fahle

Arduino Example Code


// MAX7219 LED Matrix Arduino Example
#include <LedControl.h>

// Pin configuration
#define DIN_PIN 12
#define CLK_PIN 11
#define CS_PIN 10

// Create LedControl object
LedControl lc = LedControl(DIN_PIN, CLK_PIN, CS_PIN, 1);

void setup() {
  lc.shutdown(0, false);      // Wake up the MAX7219
  lc.setIntensity(0, 8);      // Set brightness (0-15)
  lc.clearDisplay(0);         // Clear display
}

void loop() {
  // Display a simple pattern
  byte smiley[8] = {
    B00111100,
    B01000010,
    B10100101,
    B10000001,
    B10100101,
    B10011001,
    B01000010,
    B00111100
  };

  for (int row = 0; row < 8; row++) {
    lc.setRow(0, row, smiley[row]);
  }

  delay(2000);
  lc.clearDisplay(0);
  delay(1000);
}

Applications

  • Scrolling text and message displays
  • Digital clocks and counters
  • Status indicators and dashboards
  • Educational electronics projects
  • DIY and hobbyist LED display systems