The Adafruit NeoKey Trinkey is a USB-A development board that combines an ATSAMD21 microcontroller, a Cherry MX-compatible key switch footprint, and an RGB NeoPixel LED into one tiny plug-in package. Insert it into any USB-A port and you've got a single-key macro pad, password entry device, or custom shortcut button — fully programmable with CircuitPython or Arduino.

The board includes a reverse-mount NeoPixel for colourful backlighting through the keycap, a capacitive touch pad for an extra input, and native USB support for serial, MIDI, and HID (keyboard/mouse) modes. Small, durable, and inexpensive — perfect as a first microcontroller project or a quick utility tool.

Key Features

• ATSAMD21E18 – 48 MHz Cortex M0+, 256 KB Flash, 32 KB RAM
• Cherry MX-Compatible Footprint – Solder in your favourite mechanical switch (two solder points)
• Reverse-Mount NeoPixel – RGB LED shines up through the keycap
• Capacitive Touch Pad – Additional touch input
• Native USB – Serial, MIDI, HID (keyboard/mouse), and small disk drive
• USB-A Form Factor – Plugs directly into any USB-A port
• CircuitPython & Arduino – Fully supported with existing libraries
• Reset Button – For restarting code or entering bootloader mode

Ideal For

• Single-key macro pads and shortcut buttons
• Password entry devices
• Custom Escape key for MacBooks
• USB MIDI triggers with visual feedback
• Keychain-friendly gadgets

Package Contents

• 1× Adafruit NeoKey Trinkey PCB