Hello! Doug that has been a work in progress ever since the technology was first announced. That is the ability to sense temperature using a semiconductor device. And incidentally read the data back to software and the host in a timely fashion.
For example if any of us have here DS1820 devices, without the B in the name and an early date code, then they won't work properly because of most of those issues. --- Gregg C Levine [email protected] "This signature is not the same one. Move along! Move along!" > -----Original Message----- > From: Doug Collinge [mailto:[email protected]] > Sent: Thursday, March 10, 2011 12:48 PM > To: [email protected] > Subject: Re: [Owfs-developers] [SOLVED] Dreaded 85 degrees C read from DS18B20 > located outside > > > Their (Maxim tech. support's) response seems to imply that things would > not work by leaving Vdd floating. However, it has worked for me for > months, and even iButtonLink seem to be shipping sensors with Vdd > floatin (the following comes from the manual for iButtonLink's T-Sense > sensor > [http://www.ibuttonlink.com/pdf/manuals%20for%20t-sense%2005-22- > 08.pdf]): > > > > I don't think they said that it "won't work", I think they meant "it will only work by > accident", meaning, if you rely on a floating Vdd (because it works in current > production) and they change something that causes it not to work in future production > then it's your problem, not theirs. > > With high-impedance inputs left floating you are at the mercy of all kinds of variables > like humidity, dust on the circuit board, electrostatic induction, board layout - a whole > zoo of variables you can't control very well. > > iButtonLink seems to me to be saying more or less the same thing: "It SEEMS to work > with a floating Vdd - but we are not guaranteeing it." Otherwise, they would have said, > "It WILL work with a floating Vdd." ------------------------------------------------------------------------------ Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
