Such devices have existed as gyrocompasses for navigation since the beginning of the century and even Einstein was involved in their further development (although the earliest approaches date back to 1743). Enough history, our current devices for determining rotations and accelerations are tiny marvels of nanotechnology without actual gyroscopes. Instead, they are IMUs (Inertial Measurement Units), which are based on silicon surface micromechanics and can now be mass-produced at very low cost. This is why they can be found in almost every mobile phone, the remote controls of games consoles, TVs, and also in drones, gimbals and numerous cameras (sadly, also in cruise missiles or intercontinental ones). We'll stick with the term 'gyro' here, as this is the term most camera manufacturers use. The hardware Image stabilisation in the camera or lens is already dependent on IMU chips. For some time now, many cameras have also been able to indicate in two axes whether they are being held horiz...