is31fl3731-led-matrix-driver

Important Note

This entire repo was AI created - including all of the data within. The intent was to A) help me with my personal electronics inventory; and B) see how I could use AI to make that process a bit easier. DO NOT TRUST!

Adafruit 16x9 Charlieplexed PWM LED Matrix Driver - IS31FL3731

Details

• Location: Cabinet-1, Bin 23
• Category: LED Backpacks
• Type: 16x9 Charlieplexed PWM LED Matrix Driver
• Driver Chip: IS31FL3731
• Interface: I2C with STEMMA QT / Qwiic connectors
• Quantity: 3
• Product URL: https://www.adafruit.com/product/2946

Description

I2C LED matrix driver breakout featuring the IS31FL3731 chip with STEMMA QT / Qwiic connectors for easy plug-and-play connections. Drives up to 144 LEDs in a 16x9 charlieplexed configuration with individual PWM control for each LED. Perfect for creating LED matrix displays with minimal pin usage.

Specifications

• Part Number: 2946
• Driver Chip: IS31FL3731
• Matrix Configuration: 16x9 (144 LEDs max)
• Technology: Charlieplexed PWM control
• Interface: I2C (address selectable)
• Connectors: 2x STEMMA QT / Qwiic (JST SH 4-pin)
• Voltage: 2.7V - 5.5V (power and logic)
• PWM Resolution: 8-bit (256 levels) per LED
• Frame Memory: 8 separate frames for animations
• Dimensions: 43.2mm x 28.0mm x 4.7mm (1.7” x 1.1” x 0.2”)
• Weight: 4.4g (0.2oz)

Image

Features

• Individual LED Control: Each of 144 LEDs independently controllable
• 8-bit PWM Dimming: 256 brightness levels per LED
• Charlieplexed Design: Maximum LEDs with minimal pins
• I2C Interface: Simple 2-wire control
• STEMMA QT / Qwiic: Plug-and-play connectors
• Multiple Addresses: Up to 4 drivers on same I2C bus
• Frame Buffer: 8 frames of display memory for animations
• Wide Voltage Range: 2.7V - 5.5V compatible

Driver Capabilities

• IS31FL3731: Advanced charlieplex LED driver
• 144 LED Support: Full 16x9 matrix capability
• Animation Support: Hardware frame switching
• Address Selection: Multiple drivers on one bus
• Low Power: Efficient operation
• Graphics Compatible: Adafruit_GFX library support

Applications

• LED matrix displays
• Scrolling text signs
• Animation displays
• Status indicators
• Art installations
• Educational projects
• Custom LED grids
• Wearable displays

Compatible LED Matrices

• 9x16 LED Charlieplexed Matrix (various colors)
• Custom LED arrangements
• DIY LED grids following IS31FL3731 schematic
• Any charlieplexed LED configuration up to 16x9

Interface

• Communication: I2C (TWI)
• Addresses: Selectable (up to 4 on same bus)
• Voltage: 2.7V - 5.5V compatible
• Connectors: STEMMA QT / Qwiic for easy chaining
• Libraries: Arduino, CircuitPython, Python

Programming

• Arduino Library: Adafruit_IS31FL3731
• CircuitPython: Built-in support
• Graphics: Adafruit_GFX compatible
• Functions: Lines, circles, text, bitmaps
• Animations: Frame-based animation system

Notes

• Driver board only - LED matrix sold separately
• Designed to sandwich with Adafruit LED matrices
• STEMMA QT connectors compatible with SparkFun Qwiic
• Requires basic soldering for LED matrix attachment
• Can drive custom LED arrangements following datasheet
• Multiple drivers can be chained on same I2C bus
• Perfect companion for 9x16 LED matrices

Tags

led-driver, is31fl3731, charlieplexed, i2c, stemma-qt, qwiic, matrix, adafruit