Adafruit
Adafruit Bicolor LED Square Pixel Matrix with I2C Backpack
The Adafruit Bicolor LED Square Pixel Matrix with I2C Backpack combines a 1.2" 8×8 bicolour (red/green) LED matrix with an HT16K33 I2C driver backpack. Contr...
The Adafruit Bicolor LED Square Pixel Matrix with I2C Backpack combines a 1.2" 8×8 bicolour (red/green) LED matrix with an HT16K33 I2C driver backpack. Control all 128 LEDs with just two I2C wires — the driver chip handles multiplexing, constant-current drive, and 1/16-step dimming automatically.
The bicolour LEDs display three colours: red, green, and yellow-orange (both LEDs on simultaneously). Address-selection jumpers let you connect up to eight bicolour matrices on a single I2C bus for larger displays.
Key Features
- 1.2" 8×8 Bicolour LED Matrix – Red, green, and yellow-orange (3 colours from 2 LEDs)
- HT16K33 I2C Driver – Built-in multiplexing and constant-current drive for consistent brightness
- 1/16-Step Dimming – Adjustable display brightness over I2C
- I2C Interface – Only 2 wires needed to control all 128 LEDs
- Address Jumpers – Connect up to 8 bicolour matrices on one I2C bus
- Simple Assembly – Solder the matrix onto the backpack in about 5 minutes
Ideal For
- Small pixel displays and status indicators
- Simple animations and scrolling text
- Multi-colour visual feedback in projects
- Tiled display walls using multiple matrices
Package Contents
- 1× Assembled and tested LED backpack (HT16K33)
- 1× 1.2" 8×8 bicolour (red/green) LED matrix
- 1× 4-pin header
Jargon buster
Plain-language definitions for the technical terms used above.
- Address jumpers
- Address jumpers are small solder pads or links used to change a device’s bus address. They matter when you want to connect multiple identical displays to the same controller without their addresses conflicting.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
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Related Tutorials
Free guides on learn.littlebird.com.au
