This is the Elecfreaks Octopus breakout board. You can use it to expand the Microbit. It has the option of operating at 3.3V or 5V. Which is great as this ultrasonic sensor needs 5V to work.
FPV setup for the the Sphero RVR. We put a GoPro session on top of the rollcage with a PGYTech strap mount. The GoPro streams to the GoPro app on the iPad. We drive the RVR with EDU app.