The MAX7219 88 Dot Matrix Module is an integrated serial input/output common-cathode display driver that connects microprocessors to an 8-digit 7-segment digital LED display, bar-graph displays, or a 64-red LED matrix display. This specific variant uses a compact SMD (Surface Mount Device) version of the MAX7219 chip located cleanly on the back of the board, leaving a flush, neat footprint. It is widely used by students and hobbyists to build digital clocks, stock tickers, or retro arcade displays.
Simple 3-Pin Interface: Communicates via SPI protocol (Data, Clock, and Chip Select), saving valuable GPIO pins on your Arduino, ESP32, or STM32.
Cascadable (Daisy-Chaining): Features input pins on one side and output pins on the other. You can link multiple modules together horizontally to create a long scrolling scoreboard or banner without using any extra controller pins!
Brightness Control: Supports both hardware and software-based digital brightness adjustments so you can dim the LEDs for indoor projects.
Low Profile SMD Design: The surface-mount driver chip keeps the module thin and easy to mount flush against panel cutouts or inside 3D-printed enclosures.
| Feature | Specification |
| Driver Chip | MAX7219 (SMD Variant) |
| LED Color | Bright Red |
| Matrix Layout | 8 Rows x 8 Columns (64 LEDs Total) |
| Operating Voltage | 4.7V to 5.3V DC (Ideal: 5V) |
| Communication Interface | Standard SPI Serial (VCC, GND, DIN, CS, CLK) |
| Fixing Holes | 4x M3 screw holes for secure mounting |
| Dimensions | 32mm x 32mm x 13mm |
VCC: Connects to 5V Power Source
GND: Connects to Ground
DIN: Data Input (Connects to MOSI/Digital Pin)
CS: Chip Select (Connects to SS/Digital Pin)
CLK: Clock Input (Connects to SCK/Digital Pin)
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