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Power
- Operating Voltage: 5V DC, commonly supplied by a regulated power source.
- Current Requirements: draws around 200mA to 500mA depending on the number of LEDs lit.
Input and Output
- Input: Accepts data and control signals from the microcontroller.
- Output: Displays visual information through the array of LEDs.
Physical Characteristics
- Display Matrix: Often 8×8 LEDs per module, but larger configurations are possible by linking multiple modules.
- Dimensions: Compact, usually around 60mm x 60mm for a single 8×8 module.
- Weight: Lightweight, making it suitable for portable projects.
Technical Specifications
- Driver IC: MAX7219, which handles multiplexing and LED control.
- Resolution: Standard 8×8 matrix per module.
- Interface: SPI-like serial interface for communication with the microcontroller.
Additional Features
- Brightness Control: Some modules come with a built-in brightness adjustment.
- Daisy-Chaining: Allows connecting multiple modules to create a larger display without extra control lines.
How to Use
- Wiring: Connect the module’s VCC and GND to the power source. Attach the DIN, CS, and CLK pins to the corresponding pins on the microcontroller.
- Install Libraries: For Arduino, install the LedControl or MD_MAX72XX library to simplify programming and control.
- Initialize Module: Use the library functions to initialize the MAX7219 and set up the display matrix.
- Display Data: Send commands to the module to display text, numbers, or custom patterns. The library functions make it easy to manage and update the display content.
- Program Content: Write code to update the display as needed. This might include scrolling text, changing patterns, or reacting to input.
The MAX7219 Dot LED Matrix Display Module offers a flexible and straightforward way to incorporate LED displays into projects. Its ease of use and ability to chain multiple modules together make it a popular choice for both beginners and advanced users.
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