Originally Posted by
tyrion
I think cadence could be determined by a tiny camera that can see any part of your legs or feet/pedals/crank, and speed could be determined by camera that can see any part of the spokes. Maybe a camera could read the motion of a smooth tire. Maybe it could read the ground. So a single head unit with built-in cameras might be able to handle those 2 data gathering tasks without any extra devices or wiring or radios. Need some AI processing of the camera output, so not sure how physically small that amount of processing can be packaged right now. If it not now, soon.
This scheme seems an overly-complicated way to deal with something that already has a proven solution.
The magnet-less sensors are small and reliable. They don't require power-sucking "AI processing" and they don't need to have clean lenses.