It all depends on the environment.  I have one product that sends 1200
baud TTL level serial data 400 meters.  It is through coax under
seawater so there is virtually no interference.  If I wrap the coax
around a running CRT I get all sorts of transmission errors.
What type of wire are you looking to use and where will it run?

Sherpa Doug

> -----Original Message-----
> From: Pedro Drummond [mailto:digicall@IFXBRASIL.COM.BR]
> Sent: Thursday, July 12, 2001 2:21 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: temp sensors cable length
>
>
> Hi friends.
>
> From personal experience, what should be the maximum distance
> one can read a Dallas 1620 or 1820 from ? I mean serial
> signals directly, without RS 232, 485, etc.
>
>
> TIA,
>
> Pedro.
>
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