On Sun, May 22, 2011 at 02:10:38PM -0700, Pedro C??rte-Real wrote: > I have a water heating solar panel installation that has several > platinum resistance thermometers. Has anyone read these using 1wire > parts? They are connected to the control box of the installation. > Would it even be safe to connect another reader to it. I'm assuming > that any resistance meters would send a current through the resistance > and that connecting two to the same resistance would screw up the > readings if both do it at the same time.
I have not used RTDs personally, but I have used similar devices for other things. You need a fairly accurate bridge amplifier with low drift. To use one of these with 1wire you should build the amplifier module and use that to drive one of the analogue to digital converters (e.g. ds2450) You will need a separate power supply to drive the amplifier. njh ------------------------------------------------------------------------------ What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
