MAX7219 Red Dot Matrix Module

Specifications:

Module Type: Dot Matrix Display
IC: MAX7219
Display Size: 8 x 8 matrix (64 LEDs)
Color: Red LEDs
Interface: Serial Communication (SPI)

Special Features:

Integrated Driver: The MAX7219 IC drives the LED matrix, reducing the need for multiple I/O pins on the microcontroller.
Scalability: Can be cascaded with additional modules to create larger displays.
Brightness Control: Adjustable brightness via software.

Original price was: ৳ 400.00.Current price is: ৳ 250.00.

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Specification

Overview

Wiring Connections:

Power:
- VCC: Connect to 5V power supply.
- GND: Connect to ground (GND).
Data Pins:
- DIN: Data In pin, connects to the data output pin of the microcontroller.
- CS: Chip Select pin, used to select the module for communication.
- CLK: Clock pin, used for the serial clock signal.
Additional Pins:
- DOUT: Data Out pin, for chaining additional modules.

Power:

Operating Voltage: 5V DC.
Current Consumption: around 0.4A for full brightness, but can be lower with reduced brightness settings.

Input and Output:

Input: Receives serial data via SPI interface from a microcontroller.
Output: Displays text, graphics, or patterns on the 8 x 8 LED matrix.

Physical Characteristics:

Dimensions: Approximately 6cm x 6cm x 1cm (depends on module design).
Mounting: Designed to be mounted on a breadboard or directly in a project enclosure.
Connector Type: comes with pin headers for easy connection.

Technical Specifications:

Controller: MAX7219 IC, which handles the LED matrix driving and serial communication.
Matrix Resolution: 8 x 8 LEDs, giving a total of 64 LEDs.
Communication Protocol: SPI (Serial Peripheral Interface), which allows for fast data transfer.
Refresh Rate: The MAX7219 refreshes the display quickly to ensure smooth operation.

Additional Features:

Built-In Decoder: The IC decodes the serial data into signals to control the LED matrix.
Digit and Segment Control: The IC can also be used to control 7-segment displays or LED bars in addition to dot matrices.
Easy to Interface: Simple to connect and use with popular microcontrollers like Arduino.

How to Use:

Connect the Power:
- Attach the VCC pin to a 5V power supply.
- Connect the GND pin to the ground of your microcontroller or power source.
Wire the Data Pins:
- Connect the DIN pin to a digital output pin on the microcontroller that will send data.
- Attach the CS pin to another digital output pin for chip selection.
- Connect the CLK pin to a digital output pin for the clock signal.
- If using multiple modules, connect the DOUT pin of the first module to the DIN pin of the next module in the chain.
Install Required Libraries:
- For Arduino, install libraries such as LedControl or MD_MAX72XX for easy interfacing with the MAX7219.
- These libraries help manage display functions and simplify the programming process.
Write or Load Code:
- Use example code from the library or write your own to initialize the module, send data, and control the display.
- Common functions include setting brightness, displaying text, and drawing patterns.
Upload and Test:
- Upload the code to the microcontroller and power the system.
- Verify that the display shows the expected output and responds to your commands.

The MAX7219 Red Dot Matrix Module is an efficient and versatile display solution, ideal for projects requiring clear, customizable visual output. Its ability to handle multiple modules in a chain and the simplicity of its SPI interface make it a popular choice for DIY electronics enthusiasts.