RE: Dallas 1820 WAS:Homevision - one more time...

[Keith Doxey <ukha.diyha@xxxxxxx>]

Unless signal reflections within the cable interfere with the data.

In that case you run to and from the sensors using different pairs in the
cable

eg.

HV - * - sens1 - * - sens2 - * - sens(n) - * - lastsens
where * = point that all cables are star wired from.

Hope that makes sense!  :-)

That way it is one run from Homevision to the last sensor so they are daisy
chained.
The only thing to watch is total cable length.

Keith

> -----Original Message-----
> From: K. C. Li [mailto:li@xxxxxxx]
> Sent: Friday, May 11, 2001 15:31
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] Dallas 1820 WAS:Homevision - one more time...
>
>
> > > skills are horrendous and you would laugh at the way I
> have soldered my
> > > DS1820 :-) But it works ok and no-one can see it.
> >
> > Actually, I'm telling pork pies, I know of someone who has
> set a few up in a
> > star config, but according to Dallas, that shouldn't work :-)
>
> There is no reason why the "star" configuration won't work,
> as long as the
> branches join back to a single point. Each DS1820/18S20 is
> individually
> addressable so there is no confusion as to which one is being
> addressed.
>
> Regards,
>
> Kwong Li
> li@xxxxxxx
> Laser Business Systems Ltd.
> http://www.laser.com
>
>
>
>
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>




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