Adafruit Mini 8x8 LED Matrix w/I2C Backpack - Red [PID:869] - (AD60222)

Description:

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 controller chips like the MAX7219 which can control a matrix for you, but there's a lot of wiring to set up and they take up a lot of space. Here at Adafruit we feel your pain! After all, wouldn't it be awesome to be able to control a matrix without tons of wiring? That's where these adorable 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 no multiplexing by your microcontroller. They use constant current drivers for incredibly bright, consistent color (the images above are shot in the dimmest setting to avoid overloading our camera!), 1/16 step display dimming, all over a simple I2C interface. The backpacks come with address selection jumpers so you can connect up to four mini 8x8's (or a combination, such as four mini 8x8's and four 7-segments, etc.) on a single I2C bus.

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