• Front view of the MAX7219 8-digit 7-segment LED display module showing the red digital tube screens.
  • Back PCB view of the MAX7219 display driver module highlighting the integrated circuit and soldering points.
  • MAX7219 8-digit LED digital tube module alongside its included straight and right-angle pin headers.
  • Typical application circuit diagram showing how to wire the MAX7219 common-cathode display driver to a microprocessor.
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MAX7219 8-Digit 7-Segment LED Display Module | Arduino Compatible

MAX7219 8-Digit 7-Segment LED Display Module | Arduino Compatible

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HK$25.00
HK$25.00
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Short Product Description

Stop wasting valuable microcontroller pins on complex wiring. The MAX7219 8-Digit LED Display Module lets you drive a bright, clear numerical display using only 3 I/O ports. Fully compatible with 5V and 3.3V systems like Arduino and Raspberry Pi, it’s the perfect plug-and-play solution for rapid prototyping, STEM projects, and industrial panel meters.

Key Features

  • 3-Pin Control Interace: Saves valuable microcontroller I/O ports by using a simple serial interface (DIN, CS, CLK).
  • Universal Compatibility: Works flawlessly with both 5V and 3.3V microcontrollers, including Arduino, Raspberry Pi, and ESP8266/ESP32.
  • Integrated Memory: The built-in static RAM stores digit values, eliminating the need for continuous MCU refreshing and saving processing power.
  • Cascadable Design: Easily daisy-chain multiple display modules together to create longer data readouts or larger digital dashboards.
  • Adjustable Brightness: The MAX7219 chip allows for software-controlled brightness adjustment to suit different lighting environments.
  • Ready to Use: Pre-soldered components and included pin headers mean you can plug it into a breadboard and start coding immediately.

Full Product Description

Simplify Your Wiring with the MAX7219 Display Driver

Building a digital clock, a custom timer, or an industrial control panel? Managing multiple seven-segment displays can quickly eat up all your microcontroller's I/O pins and lead to a frustrating mess of jumper wires.

The MAX7219 8-digit LED display module solves this problem by utilizing an integrated serial input/output common-cathode display driver. Instead of wiring each segment individually, this module connects your microprocessor to an 8-digit numeric display using an efficient SPI-compatible interface.

 

High Visibility, Low Pin Count

By requiring only 3 I/O ports (DIN, CS, CLK) to drive all eight digits, this module frees up your board's resources for other critical sensors and components. The integrated MAX7219 IC handles all the heavy lifting, including BCD code-B decoding, multiplex scan circuitry, and segment and digit drivers. It even features an on-chip static RAM that stores each digit, meaning your microprocessor doesn't have to continuously refresh the display.

 

Seamless 5V and 3.3V Microcontroller Integration

Whether you are working with a classic 5V Arduino Uno or modern 3.3V development boards like the ESP32 or Raspberry Pi, this module adapts effortlessly. It operates stably across logic levels, ensuring accurate and flicker-free red LED readouts for any project.

 

Built for Daisy-Chaining

Need more than 8 digits? The module is designed with standard pin headers on both ends (input and output), allowing you to cascade multiple modules together sequentially without sacrificing additional micro-controller pins.

Technical Specifications

  • Driver IC: MAX7219 (for common-cathode 7-segment displays).
  • Display type: 8-digit 7-segment LED display module.
  • Display color: Red.
  • Operating voltage: 3.3V to 5V DC.
  • Interface: Serial, SPI compatible, 3-wire (DIN, CLK, CS).
  • Dimensions: 82 mm × 15 mm × 18 mm.
  • Mounting: 4 × M3 fixing holes for easy installation.

Delivery Options

  • Local delivery within Hong Kong and in-store pickup.​
  • Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.​
  • Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).​
  • Estimated delivery time: 1–3 business days after dispatch (Hong Kong).​
  • In-store pickup details (location and time) will be confirmed by email or phone message.​
  • Delivery times are estimates and may be affected by weather or unforeseen circumstances.​

FAQ Section

Q. How do I connect this MAX7219 module to an Arduino?
A. Connecting to an Arduino is simple. Connect VCC to 5V, GND to GND, DIN to a digital pin (e.g., D12), CS to another digital pin (e.g., D10), and CLK to a third (e.g., D11). You can use the popular LedControl library in the Arduino IDE to easily send numbers to the display.

Q. Can I use this with a 3.3V board like the ESP32 or Raspberry Pi?
A. Yes, the module is compatible with 3.3V logic levels. However, for maximum brightness and stability, you may choose to power the VCC pin with 5V while sending 3.3V data signals, as the MAX7219 logic inputs recognize 3.3V as a HIGH state.

Q. How many of these display modules can I daisy-chain together?
A. You can theoretically cascade up to 8 modules (64 digits total) on the same SPI bus without noticeable lag. Simply connect the DOUT pin of the first module to the DIN pin of the second module.

Target Users / Applications

  • DIY Electronics Enthusiasts & Makers: Perfect for custom digital clocks, scoreboards, and temperature displays.
  • STEM Students & Educators: An excellent, easy-to-code visual output for learning Arduino programming and SPI communication.
  • Industrial Engineers: Ideal for rapid prototyping of panel meters, bar-graph displays, and industrial equipment readouts.
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