Hi all (first post! be forgiving :))
I got a little toy car (about 6cm wheel diameter) running with small stepper motors at low speed. I'm trying to capture the movement. I'm currently using sort of reflection sensor and a little cardboard fan I made placed on the wheel axle. Though it's about the accuracy I want (it has 24 holes and 24 wings. ~8deg?), it's not very robust and it doesn't capture direction.
There are about a million ways to measure these (from what I've found, at least 3 optic ones, 3 magnetic ones, gyros and more) and for each I find myself reading for ages and then not being sure if it fits, or try to find parts and then find out they are super expensive. Most of the post I found are about bicycle which is very different. So I thought maybe here someone will have the experience and knowledge to tell me what's the best solution for me.