Actually, the accuracy spec on the DS2438 temperature is +/- 2. You have to
calibrate it to get higher accuracy readings.
Regards,
Bill Farmer
-Original Message-
From: Pedro Côrte-Real [mailto:pe...@pedrocr.net]
Sent: Saturday, March 10, 2012 4:24 PM
To: OWFS (One-wire file system) di
Alex,
The LinkUSB is putting 85ma or maybe a little more of +5V onto the cable
but maybe the DS28EA00 doesn't know how to use it. In the 1-wire world,
that is a lot of power.
Regards,
Bill Farmer
From: Alex Shepherd [mailto:list...@ajsystems.co.nz]
Sent: Monday, July 18, 2011 7:50
,
Bill
-Original Message-
From: Eloy Paris [mailto:pe...@chapus.net]
Sent: Thursday, March 10, 2011 9:57 AM
To: owfs-developers@lists.sourceforge.net
Subject: Re: [Owfs-developers] [SOLVED] Dreaded 85 degrees C read
fromDS18B20 located outside
Bill,
On 03/10/2011 09:52 AM, Farmer iButtonLink
Elroy,
The statement in our manual is misleading. The "floating" Vdd pin is
not really floating. It is connected to +5 on the cable. IF, however,
you are using a master (in our case the Link45 family) that does have a
connection to +5 on the cable, the net result is that the Vdd pin of the
DS18
Hmmm, sounds like a floating Vdd pin on one (or more) of the DS18B20's
(your power connection really isn't). If you float the +5V pin on a
DS18B20, sometimes they work, sometimes they don't.
BTW, did you realize the LinkUSB has 70ma of +5V power at the connector?
Regards,
Bill Farmer
> -
