Thomas Lehmann wrote:
>
> Hello to all,
>
> actually I have to do a speed measurement of a moving metal part with the
> use of two
> variable reluctance sensors (magnetic).
> Did anybody knows a good design for the comparator schematic or any hints in
> using these sensors??

Hi Thomas, you will get heaps of problems with the
sensors behaving differently (different slope deltas,
wave shapes, voltages etc) as the metal moves past at
differing speeds. I would seriously suggest using
optical (beam break) sensors if you want good speed
measuring.
-Roman

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