Using a broken ferrite core inductor as a sensor to measure chain state is a brilliant idea, aside from the whole extra-weight-on-the-bike thing, but I had a really hard time paying attention because O.M.G. that bike is dirty. Seriously man! Get to work on that, and then we’ll talk…
The broken inductor was positioned on the rear frame of the machine such that the chain passed through the area where the broken half of its core would once have been. As each link passes through the magnetic field it causes the inductance to change, and from this the speed, direction, and tension of the chain can be read.
