![]() 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. 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 work perfectly with the matrices we stock in the Adafruit shop and make adding a bright little display trivial. We have them in two flavors - a mini 8x8 and a 4-digit 0.56" 7-segment. Here at Adafruit we feel your pain! After all, wouldn't it be awesome if you could control a matrix without tons of wiring? That's where these adorable LED matrix backpacks come in. 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. Matrices like these are 'multiplexed' - so to control all the seven-segment LEDs you need 14 pins. ![]() 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.
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