Build a handheld light-up button controller with this complete kit that pairs the Adafruit 4×4 NeoTrellis RGB Driver with a Feather M4 Express inside an elegant laser-cut acrylic enclosure. The 16 silicone buttons each have individually addressable NeoPixels underneath, and the seesaw I2C chip handles both button scanning and LED driving — so all communication happens over a simple I2C connection.

With Arduino/C++ and CircuitPython/Python library support, this kit is ready for MIDI controllers, interactive interfaces, control panels, or any project that benefits from illuminated tactile buttons.

Key Features

• 4×4 NeoTrellis RGB Button Grid – 16 silicone buttons with individually addressable NeoPixels
• Feather M4 Express Included – Powerful ATSAMD51 microcontroller with CircuitPython support
• Seesaw I2C Control – Button scanning and NeoPixel driving handled entirely over I2C
• Laser-Cut Acrylic Enclosure – Elegant black and white design with diffused button illumination
• STEMMA QT Cable Included – Simplifies wiring between the NeoTrellis and Feather
• Arduino and CircuitPython Support – Libraries available for both platforms

Ideal For

• MIDI instruments and music controllers
• Interactive control panels
• Custom macro keyboards
• Light-up game controllers

Package Contents

• 1× Adafruit NeoTrellis RGB Driver PCB for 4×4 Keypad
• 1× Adafruit Feather M4 Express
• 1× Adafruit 4×4 NeoTrellis Acrylic Enclosure and Hardware Kit
• 1× JST PH 4-Pin to Male Header Cable (I2C STEMMA, 200 mm)
• 1× Silicone Elastomer 4×4 Button Keypad
• 1× Little Rubber Bumper Feet (4 bumpers)