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From: tim@tecno.demon.co.uk (Tim Craig)
Subject: Re: Looking for inexpensive angular resolver
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References: <D7EA1x.LI3@demon.co.uk> <204@jkmicro.DIALix.oz.au>
Date: Wed, 26 Apr 1995 19:37:21 GMT
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ajansen@jkmicro.DIALix.oz.au (Adrian Jansen) wrote:

| Check out Allegro Microsystems for Hall effect devices and
| applications.

Thanks Adrian,

Yes - I know their proucts well.

| Else look at optical shaft encoders - Hewlett Packard make these
| in a wide variety of types and prices.

This is my problem. I would really like to use an optical encoder disc
because it is flat, just the style I want, but you need to use a
memory based device such as the HCPL2000 to do the counting - If you
lose power, you lose your reference. A sin/cos type angular resolver
will tell me where the pulley is within 360 degrees even after
power-down.


Tim Craig
Electronic Design Laboratory. Bristol (UK)

