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https://www.techmezine.com/allegro-product-news/magnetic-position-sensors-efficiently-drive-e-bike-pedal-assistsystems/ This is the link that some kindly soul posted yesterday, before swiftly deleting it.

Agreed. With an irregular pattern.

And I was about to respond to the now disappeared post showing the use of an Allegro device, which actually incorporates three Hall effect sensors. But sorry, saneagle, I didn't want to upset anybody, just getting my head round how this stuff works.

I would agree, but I guess the aim is to only generate the pulse train in the forward direction.

I'm not sure about that. I don't think a single Hall effect sensor can determine the direction of travel of a magnet. I know there are some chips that can do this, but as far as I know, they have two Hall effect sensors integrated in the one chip. I may be very new to eBikes, but I've been...

Interesting. How do they avoid working when reverse pedalling?

If the cadence sensor has just the three wires, then my guess is that there are two Hall effect sensors, which produce a quadrature signal as the pedals turn, and there is a little bit of internal logic which gates one of the quadrature waveforms with the derived direction signal, so there's no...

Ok. Sorted. I had to invoke the self learning mode again, and now the speedo/odometer is working with the spoke magnet/reed switch speed.

Yes.

Thanks. Neither option seems to work right now. The speedo/odometer works fine using the motor hall sensors, but seems to ignore the white wire. Is it possible that I need to connect the spoke magnet sensor and re invoke the self learning mode? Also, when I first got this running, I used a...

I'm in the process of replacing the faulty controller in a very old 26V Giant eBike with a Sync drive front hub motor. Things are looking good, except for the fact that the speedo/odometer function on the S866 display doesn't work when freewheeling. Am I correct in thinking that I can use the...