Adafruit
Adafruit Small 1.2 8x8 LED Matrix w/I2C Backpack - Ultra Bright White
The Adafruit Small 1.2" 8×8 LED Matrix w/I2C Backpack in ultra-bright white combines a bright 8×8 LED matrix with a dedicated HT16K33 driver backpack, lettin...
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The Adafruit Small 1.2" 8×8 LED Matrix w/I2C Backpack in ultra-bright white combines a bright 8×8 LED matrix with a dedicated HT16K33 driver backpack, letting you add a compact display to any microcontroller project with just two I2C data lines.
Instead of wiring 16 pins to multiplex 64 LEDs, the backpack handles all the multiplexing, constant-current drive, and 1/16-step dimming over I2C. Three address-selection jumpers let you connect up to eight backpacks on a single I2C bus for larger display arrays.
Key Features
- HT16K33 I2C Driver – Built-in multiplexing and constant-current drive for bright, consistent colour
- 1/16-Step Dimming – Fine-grained brightness control via I2C commands
- I2C Interface – Only two data lines (SDA/SCL) needed, freeing up GPIO pins
- Address Jumpers – Three jumpers allow up to 8 units on a single I2C bus
- 1.2" White LED Matrix – 8×8 grid of ultra-bright white LEDs
- Simple Assembly – Solder the matrix onto the backpack in about 5 minutes
Also Consider
- Small 1.2" 8×8 LED Matrix w/I2C Backpack – Blue
- Small 1.2" 8×8 LED Matrix w/I2C Backpack – Green
- Small 1.2" 8×8 LED Matrix w/I2C Backpack – Pure Green
- Small 1.2" 8×8 LED Matrix w/I2C Backpack – Red
- 1.2" 8×8 LED Matrix Backpack – Backpack driver board only (BYO matrix)
Package Contents
- 1× Assembled and tested 1.2" LED backpack (HT16K33)
- 1× Ultra-bright 1.2" 8×8 white LED matrix
- 1× 4-pin header
Resources
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.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- 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.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- SDA/SCL
- SDA and SCL are the two signal lines used by an I2C bus: data and clock. Seeing these names helps you identify the correct connections when wiring I2C devices, even though Qwiic cables usually hide that wiring for you.
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