A Wii nunchuk is ideal for manual control of such a device, thanks to its ergonomic design and ease of interface (the nunchuk communicates over I 2 C, which is easily within the reach of even ...

two buttons, and an accelerometer. The nunchuck is meant to plug into a Wii controller and the connection is I 2 C, so that’s trivial to interface to an Arduino or other small microcontroller.