We'll be powering the pixels directly through the board since we only have a few pixels. This arrangement works for small projects of 30-60 pixels. For larger projects with more LEDs, you'll want to power the pixels directly from a 5V power supply. If you are powering more than 20 LEDs or so, see the guides below:
The QT Py attaches back-to-back with the BFF using soldered-on headers.
The NeoPixel strip plugs into the 3-pin connector on the BFF, and the IR sensor will plug into the Stemma port on the QT Py using a a Stemma cable.