Virtual reality is all the rage these days, especially with devices like the Oculus Rift, Gear VR, and HTC Vive hitting shelves lately. But before any of those fancy, expensive headsets ever made it to the market, Google came up with a thrifty and inventive substitute in the form of Google Cardboard.
An accelerometer/gyro goes onto an Arduino board and transmits the angular motion of the skateboard via Bluetooth to a virtual reality game I made for Android phones and Google Cardboard.