On Fri, 4 Aug 2000 12:56:49 -0700, you wrote:

>You might also look at something called GMRR (Giant Magneto Resistive...
>something or other).  Basically they are little SO8's that can detect a
>magnetic field and either put out porportional output or a logic level =
at
>much higher sppeds than a reed switch.  I think the company that made =
these
>was called NVE?
Philips also make these - part number is KMZ51

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