Constant-current drivers for ultra-bright, consistent color
Built in clock so they multiplex the display
Come with address-selection jumpers
Fully tested and assembled
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 all the seven-segment LEDs you need 14 pins. 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. They 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, 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 (or a combination, such as four mini 8x8's and four 7-segments, etc) on a single I2C bus.
Item Specifics This board/chip uses I2C 7-bit address between 0x70-0x77, selectable with jumpers Backpack Dimensions: 27mm x 50mm x 4mm / 1.1" x 2" x 0.16" Backpack Weight: 5.3g 7-Segment Display Dimensions: 19mm x 50mm x 14mm / 0.75" x 2" x 0.56" 7-Segment Display Weight: 8.4g Display Color: Yellow Setup guide and Arduino libraries available from Adafruit
Kit Includes: A fully tested and assembled LED backpack Ultra-bright 4-digit 0.56" tall yellow seven-segment display 4-pin header