The MAX7219 8-Digit 7-Segment Display Module is an all-in-one serial input/output common-cathode display driver that connects microcontrollers to 7-segment numeric LED displays up to 8 digits. This module comes fully assembled, meaning the LED blocks, MAX7219 IC, capacitors, and interface headers are completely pre-solderedjust plug it into your breadboard or jumper wires and start coding. It is perfect for displaying frequency readouts, weights, countdown timers, or any numerical data.
Fully Assembled Convenience: Skip the tedious soldering; this board is 100% plug-and-play out of the box.
3-Pin SPI Interface: Uses only 3 digital pins (DIN, CS, CLK) to communicate with your microcontroller, saving valuable GPIO space.
Cascadable Design: Features input pins on one side and output pins on the other, allowing you to daisy-chain multiple modules together to display 16, 24, or more digits.
Software Brightness Control: Adjust the LED intensity via code using digital brightness control (16 predictable levels) to fit indoor or dark environments.
Individual Digit Addressing: Update any single digit without rewriting the entire 8-digit display sequence.
| Feature | Specification |
| Operating Voltage | 4.7V to 5.3V DC (5V Ideal) |
| Driver Chip | MAX7219 (Common Cathode) |
| Display Color | Vibrant Red |
| Interface Type | Serial SPI (DIN, CLK, CS) |
| Fixing Holes | 4 holes with a 3mm diameter for easy panel mounting |
| Dimensions | 82mm x 15mm x 12mm |
| Logic Compatibility | 5V Logic (Works with 3.3V microcontrollers like ESP32 with stable 5V VCC) |
VCC: Connects to 5V
GND: Connects to Ground
DIN: Data Input (Connects to MCU digital pin)
CS: Chip Select / Load (Connects to MCU digital pin)
CLK: Clock Input (Connects to MCU digital pin)
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