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Project Notes

#557 LED 8x8 Module

Building and using an 8x8 LED matrix with MAX7219 driver module.


Here’s a quick demo..



These MAX7219 8x8 LED dot matrix modules are very common and quite cheap. Usually they come assembled, but one can find sellers offering them as a “DIY” kit. The DIY option is not necessarily cheaper, but they are a nice quick little soldering project and may be more convenient if the plan is to daisy-chain multiple modules.

The kit is basically just the 1088AS LED matrix and a PCB for the MAX7219, pin headers, a pull-up resistor and decoupling capacitor.


8x8 LED Matrix

  • Part Number: 1088AS
  • Face Color: Black
  • Type: Row Cathode Column Anode
  • Wavelength : 625 ~ 630nm
  • Emitted Colour: Red
  • Forward Voltage : 2.1V ~ 2.5V
  • Forward Current: 20mA
  • Dimesions: 32mm x 32mm x 8.0mm

1088AS_module 1088AS_schematic





Example Sketch

LED8x8Module.ino is a simple Arduino sketch that uses the LedControl library to sequence through all rows and columns to verify that addressing is correct and that all LEDs are functioning correctly.

Credits and References

About LEAP#557 8x8 LEDArduino
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This page is a web-friendly rendering of my project notes shared in the LEAP GitHub repository.

LEAP is my personal collection of electronics projects, usually involving an Arduino or other microprocessor in one way or another. Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting (IMHO!).

The projects are usually inspired by things found wild on the net, or ideas from the sources such as:

Feel free to borrow liberally, and if you spot any issues do let me know. See the individual projects for credits where due. There are even now a few projects contributed by others - send your own over in a pull request if you would also like to add to this collection.