The Adafruit NeoKey BFF adds a single mechanical key switch with RGB backlighting to any QT Py or Xiao board. Designed to solder or plug onto the back of your QT Py, it features a Kailh hot-swap socket for tool-free MX-compatible switch changes and a reverse-mount NeoPixel that shines up through the keycap.

The key switch connects to pin A3 and the NeoPixel to pin A2 by default, with on-board jumpers for reconfiguration. Perfect for building a single-key macro pad, mute button, or notification trigger in the smallest possible form factor.

Key Features

• Kailh Hot-Swap Socket – Plug in any MX-compatible mechanical switch without soldering
• Reverse-Mount NeoPixel – RGB LED shines up through the switch for customisable backlighting
• QT Py / Xiao Compatible – Solders directly to the back or use headers for a removable connection
• Configurable Pins – Default A3 (key) and A2 (NeoPixel); on-board jumpers for remapping
• Compact Design – Stacks directly behind your QT Py for a minimal footprint

Ideal For

• Single-key macro pads and shortcut buttons
• Mute/unmute toggles for video calls
• Notification indicators with RGB feedback
• Custom USB HID input devices

Package Contents

• 1× Adafruit NeoKey BFF PCB (assembled)
• 1× Break-off header strip