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Catalog : Arduino, Pi, Microcontrollers, 3D Printing and Kits : Arduino, Raspberry Pi and Microcontrollers : Adafruit

Adafruit Bicolour LED Square Pixel Matrix with I²C Backpack

Adafruit Bicolour LED Square Pixel Matrix with I²C Backpack

SKU: AF-902

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What's better than a single LED? Lots of LEDs! A fun way to make a small colourful display is to use an 8x8 LED Matrix. Matrices like these are multiplexed so to control all 128 LEDs you need 24 pins. That's a lot of pins, and there are driver chips like the MAX7219 that can help control a matrix for you but there's a lot of wiring to set up and they take up a lot of space. Wouldn't it be awesome if you could control a matrix without tons of wiring? This LED matrix backpack will allow you to control an entire LED matrix with only four pins.

The matrices use a driver chip that does all the heavy lifting for you: They have a built in clock so they multiplex the display. They use constant-current drivers for ultra-bright, consistent color, 1/16 step display dimming, all via a simple I²C interface. The backpacks come with address-selection jumpers so you can connect up to four mini 8x8's or eight 7-segments/bicolour (or a combination, such as four mini 8x8's and two 7-segments and two bicolour, etc) on a single I²C bus.

Note: A bit of soldering is required to attach the matrix onto the backpack but its very easy to do and only takes about 5 minutes.

The product kit comes with:
• A fully tested and assembled LED backpack
• 1.2" Bi-color 8x8 LED Matrix
• 4-pin header


  • 33mm x 41mm x 4mm / 1.3" x 1.6" x 0.16"
  • Mounting Holes: 28mm x 36mm / 1.1" x 1.4"
  • This board/chip uses I²C 7-bit address between 0x70-0x77, selectable with jumpers

US$ 22.72 price
US$ 21.58 5 - 9 (5% Off)
US$ 20.45 10 + (10% Off)