Adafruit 16x9 Charlieplexed PWM LED Matrix Driver - IS31FL3731 - STEMMA QT / Qwiic

The IS31FL3731 is a versatile I2C LED driver designed to control a 16x9 (144 LEDs) Charlieplexed matrix with individual PWM control on each LED, allowing for stunning LED lighting effects without using many microcontroller pins.

This driver board supports a power and logic range from 2.7 to 5.5 V, making it compatible with a wide variety of microcontrollers and microcomputers. It features support for up to 4 devices on the same I2C bus using configurable addresses, and has memory for 8 frames of display, enabling smooth animations with a single command.

Designed in the STEMMA QT form factor, the board includes STEMMA QT connectors on either side for easy plug-and-play compatibility with SparkFun Qwiic cables and compatible accessories, simplifying wiring and chaining multiple devices.

Note: This product is a driver board only and does not include an LED matrix. Compatible 16x9 LED matrices in various colors (red, yellow, cool white, and others) are available separately.

Features:

• PWM control of each LED in a 16x9 Charlieplexed matrix (144 LEDs)
• Supports 2.7–5.5V power and logic
• Up to 4 devices can be used on one I2C bus with unique addresses
• 8 frames of display memory for animations
• STEMMA QT connectors for easy plug-and-play connection and chaining
• Compatible with Arduino and CircuitPython with provided libraries
• Adafruit GFX compatible for drawing graphics

Specifications:

• Dimensions: 43.2mm × 28.0mm × 4.7mm (1.7" × 1.1" × 0.2")
• Weight: 4.4g (0.2 oz)
• Operating Voltage: 2.7V to 5.5V
• I2C Interface with configurable addresses (up to 4 devices)
• STEMMA QT / Qwiic compatible connectors

For complete assembly, wiring instructions, and code examples, refer to the product tutorial. Libraries and source code support Arduino and CircuitPython platforms.