>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>On Behalf Of Milosz Kardasinski
>Sent: 19 October 2004 18:13
>To: Microcontroller discussion list - Public.
>Subject: Re: [PIC] Traction Control / Wheelspeed sensing
>
>A VR sensor is the preferred method...all OEM's stopped using 
>hall effect stuff in the early 90's. Attaching magnets to 
>stuff might pose a problems with respect to balance and other 
>aspects of the mechanical system.
>

The hall effect sensors mentioned actually have a magnet built in, so they
are VR sensors, but use a hall effect device instead of a coil, and have all
the signal conditioning built in, and best of all they seem to be very
inexpensive (~$7 was quoted).  I suspect a simple coil based VR sensor would
be much cheaper to manufacture and more robust, but I don't know of any
sources for low quantities at good prices.

Regards

Mike

=======================================================================
This e-mail is intended for the person it is addressed to only. The
information contained in it may be confidential and/or protected by
law. If you are not the intended recipient of this message, you must
not make any use of this information, or copy or show it to any
person. Please contact us immediately to tell us that you have
received this e-mail, and return the original to us. Any use,
forwarding, printing or copying of this message is strictly prohibited.
No part of this message can be considered a request for goods or
services.
=======================================================================
_______________________________________________
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist