1. The problem statement, all variables and given/known data Hello All. I am trying to design a system to determine the direction of rotation of a wheel. I do not have access to a flywheel but only the wheels inner face. Can anyone please recommend a sesnor or soultion to help me? Many thanks 2. Relevant equations 3. The attempt at a solution I have found a few hall effect sesnors with a quadrature output, which I should be able to use but unfortunatley they all seem to require like an encoder wheel or flywheel teeth. There are some ICs that do this but nothing that is roust enough for my application.