Adafruit
Adafruit 15x7 CharliePlex LED Matrix Display FeatherWing - Red
The Adafruit 15×7 CharliePlex LED Matrix FeatherWing in Red adds a bright, compact 105-LED grid to any Feather board. The onboard IS31FL3731 driver handles a...
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The Adafruit 15×7 CharliePlex LED Matrix FeatherWing in Red adds a bright, compact 105-LED grid to any Feather board. The onboard IS31FL3731 driver handles all the charlieplexing over I2C, with 8-bit (256-level) PWM dimming on every individual LED — no complex wiring needed.
The driver chip includes RAM for 8 separate frames of display memory, allowing you to set up animations and flip between them with a single command. Since it communicates over I2C, only the SDA and SCL pins are used, leaving the rest of your Feather's GPIO free for other peripherals.
Key Features
- 15×7 LED Matrix – 105 red charlieplexed LEDs
- IS31FL3731 Driver – I2C control with individual 8-bit PWM dimming
- 8 Animation Frames – Onboard RAM for storing and switching display frames
- Works with Any Feather – Shared I2C bus leaves other pins free
- 3.3V Operation – Direct compatibility with Feather boards
Also Available
Ideal For
- Scrolling text and status displays on Feather projects
- LED animations and lighting effects
- Data visualisation and bar graphs
- Wearable electronics with visual feedback
Package Contents
- 1× Adafruit 15×7 CharliePlex LED Matrix FeatherWing – Red
Specifications
- LED Grid – 15×7 (105 LEDs)
- LED Colour – Red
- Driver – IS31FL3731
- PWM Resolution – 8-bit (256 levels) per LED
- Animation Frames – 8
- Interface – I2C
- Operating Voltage – 3.3V
- Form Factor – Adafruit FeatherWing
Jargon buster
Plain-language definitions for the technical terms used above.
- FeatherWing
- A FeatherWing is an add-on board made to plug into the Feather microcontroller board layout. Knowing a product is a FeatherWing helps you check whether it will physically and electrically fit your Feather-style mainboard.
- 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.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- RAM
- RAM (random-access memory) is fast, temporary memory a device uses for working data while it is running; in its common volatile form, its contents are lost when power is removed. Some devices offer a mode that applies settings to RAM only, which is handy for testing changes temporarily because they are not stored permanently and disappear at power-off.
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