LED Dot Matix 8x8 Green 1.2 Inch High I2C Adafruit Kit Stackable

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Adafruit Small 1.2" 8x8 LED Matrix with I2C Backpack Pure Green

What's better than a single LED? Lots of LEDs! A fun way to make a small display is to use an 8x8 matrix or a 4-digit 7-segment display. Matrices like these are 'multiplexed' - so to control 64 LEDs you need 16 pins. That's a lot of pins, and there are driver chips like the MAX7219 that can control a matrix for you, but there's a lot of wiring to set up and they take up a ton of space. Here at Adafruit, we feel your pain! That's where these lovely LED matrix backpacks come in. They work perfectly with the matrices we stock in the Adafruit shop and make adding a bright little display trivial.

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 (the images above are photographed at the dimmest setting to avoid overloading our camera!), 1/16 step display dimming, all via a simple I2C interface. These 1.2" matrix backpacks come with three address-selection jumpers so you can connect up to eight 1.2" 8x8's together (or a combination, such as four 1.2" 8x8's and four 7-segments, etc) on a single I2C bus.

The product kit comes with:
  • A fully tested and assembled 1.2" LED backpack
  • Ultra-bright 1.2" 8x8 pure-green matrix
  • 4-pin header
A bit of soldering is required to attach the matrix onto the backpack but it's very easy to do and only takes about 5 minutes. If you've been eying matrix displays but hesitated because of the complexity, this is the solution you've been looking for!


  • This board/chip uses I2C 7-bit addresses between 0x70-0x77, selectable with jumpers

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Specification Value
LED Display TypeDot Matrix
Number of LEDs64
Matrix Pattern8x8
Illuminated ColorGreen
Dimensions1.2"H x 1.2"W
Forward Current - If (Typ.)20 mA
MountingThrough Hole

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