The Adafruit Neo Trinkey is a tiny USB-A development board featuring an ATSAMD21 microcontroller and four RGB NeoPixel LEDs. Just plug it into any USB-A port on a computer or laptop and you've got a programmable, colourful key that can act as a status indicator, macro keypad, MIDI controller, or simple LED flashlight.

Two capacitive touch pads on the end provide user input without any buttons, and the SAMD21 supports CircuitPython, Arduino, and native USB — including serial, MIDI, and HID (keyboard/mouse) modes. Small, durable, and inexpensive, it's perfect as a first microcontroller board or a quick platform for fun, simple projects.

Key Features

• ATSAMD21E18 – 48 MHz Cortex M0+, 256 KB Flash, 32 KB RAM
• 4× NeoPixel LEDs – Full-colour addressable RGB lighting
• 2× Capacitive Touch Pads – Left and right touch inputs on the end
• Native USB – Serial, MIDI, HID (keyboard/mouse), and small disk drive
• USB-A Form Factor – Plugs directly into any USB-A port
• CircuitPython & Arduino – Supported by both platforms with existing libraries
• Reset Button – For restarting code or entering bootloader mode

Ideal For

• Desktop status indicators and notification lights
• Macro keypads and shortcut keys
• USB MIDI controllers
• First microcontroller projects and learning to code
• Keychain-friendly portable LED gadgets

Package Contents

• 1× Adafruit Neo Trinkey