Adafruit microSD Card BFF Add-On for QT Py and Xiao
95 units available with a short lead time.
The Adafruit microSD Card BFF Add-On slots onto the back of any QT Py or Xiao board, adding a microSD card slot for megabytes or gigabytes of file storage. Using the SPI bus (MOSI/MISO/SCK) plus one chip select pin, you can read and write files for data logging, audio playback, image storage, and more.
The BFF ("Best Friend Forever") PCB is designed to match the QT Py/Xiao footprint exactly. Solder it directly for a permanent, ultra-compact stack, or use pin and socket headers to make it removable. Since the QT Py already operates at 3.3V, no level shifter or regulator is needed.
Key Features
- MicroSD Card Slot – High-quality Molex push-pull socket for any SPI-compatible microSD card
- QT Py / Xiao Compatible – Fits directly on the back of any QT Py or Seeed Xiao board
- SPI Interface – Uses MOSI, MISO, SCK, and one chip select pin
- Configurable Chip Select – Default is TX; solder jumpers available for RX, A0, or A1
- No Level Shifting Required – Designed for 3.3V QT Py/Xiao boards
- Compact Form Factor – Matches QT Py footprint for minimal size
Ideal For
- Data logging to removable storage on tiny projects
- Audio file playback from microSD
- Storing images, fonts, and configuration files
- Any QT Py or Xiao project needing file storage
Package Contents
- 1× Adafruit microSD Card BFF Add-On (assembled and tested)
- 1× Header strip for soldering
The Adafruit microSD Card BFF Add-On for QT Py and Xiao appears in the following collections:
