Yet another illustration guide, how to wire the MAX7219 on 8 Bit 7 Segment Digital LED Display driven by MAX7219. The MAX7219 is an integrated serial input output common-cathode display driver which is connected to microprocessor or microcontroller along with the 8 bit 7 segment digital LED display. This module you also place the LED Graph display LED or 64 separated LED. Includes an on chip type B BCD encoder a multi-channel scanning loop, segment WORD driver, and also an 8×8 static RAM that stores each data. This chip is only one external register can be used to set the current of each LED segment.


The MAX7219 has integrates a convenient four wire serial interface that can be used to all micro-controller, microprocessor. Each on-chip data can be addressed in the update without rewriting all display, and also allows you to select each data encoding or no-coding.

The entire module device includes a 150μA low power shut off mode, analog and digital brightness control, scan limit register allows you to display 1-8 bit data, and LED light detection mode.


0.36 inch
Common cathode
Only need three IO ports can drive 8 bit digital tube
The module compatible of 5V / 3.3V microcontroller (51 / AVR / STM3) and Raspberry Pi

Schematics Diagram


Wiring Illustration Guide


Sketch Code


Download Schematic Diagram | Image
Download LedControl.h Code Library | GetHub | Zip
Download MAX72XX Datasheet | PDF


Wiring MAX7219 on 8 Bit 7 Segment Digital LED Tube Display


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