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Keyestudio Red color common cathode I2C 8*8 LED dot Matrix module HT16K33 for arduino

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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' - 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. After all, wouldn't it be awesome if you could control a matrix without tons of wiring? That's where these lovely LED matrix backpacks come in.
The matrices use the constant-current drivers for ultra-bright, consistent color, 1/16 step display dimming, all via a simple I2C interface.


  • 8 rows and 8 cols LED matrix

  • Driven by HT16K33 chip

  • Access to I2C communication pins

  • Occupy less IO ports of microcontrollers

  • Easy connection and available for more experiment extensions

  • Input voltage: 5V

  • Rated input frequency: 400KHZ

  • Input power: 2.5W

  • Input current: 500mA

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