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...
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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, links or switches used to change a device's address on a shared bus such as I2C. They matter when you want to connect several identical devices to the same controller, since each one needs a unique address to avoid conflicts.
- 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 (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
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