Hi Phil, On 10/27/2011 09:08 AM, Phil White wrote:
> Change that - it appears that a PRT (or RTD) might be the way forward, > rather than a thermocouple. If "I don't want to get my hands dirty doing a little bit of programming/wiring" is *not* a requirement then would a microcontroller-based device like Pascal Baerten's BAE be overkill? http://www.brain4home.eu/index.php?option=com_virtuemart&Itemid=9 You would just have to wire your temperature-sensing device and a relay. JeeLabs' JeeNodes would also be an option if 1-Wire communications is not a requirement (I am not aware that JeeNodes can take the role of 1-Wire slaves but I may be wrong). If communication with a host computer is not a requirement (or if communication via a serial interface is okay) even an Arduino with little programming and wiring could be an option. Good luck finding the best solution, and please let us know what works for you in the end. Cheers, Eloy Paris.- > > On 27 October 2011 13:17, Phil White<[email protected]> wrote: >> Hi Paul, >> >> Yes, I know of this product. I have emailed them for clarification on >> a couple of points (it appears that you cannot adjust the hysteresis), >> but essentially this is the sort of product I need... except that it >> is a room temperature sensor, and I need to measure water temp. I >> certainly intend to get 1 to play with. >> >> The DS1821 is, as Patryk says, is *almost* what I want - except that >> it is either a temp sensor, *or* a thermostat, but never both at the >> same time, due to the fact that the DQ pin is dual purpose, and it is >> going to be a pain to flip it from one state to the other. >> >> Using a thermocouple is the approach I favour at the moment - but that >> is only because I haven't come across many alternatives. >> >> Thanks for the help so far. >> >> >> >> On 27 October 2011 11:38, Paul Alfille<[email protected]> wrote: >>> Embedded Data Systems has exactly that in their "Environmental Sensors" >>> (which is tested and supported by owfs). >>> >>> http://owfs.org/index.php?page=eds-enviromental-sensors >>> >>> Different models also can sense humidity, pressure and light. >>> >>> 2011/10/27 Patryk<[email protected]> >>>> >>>> Dnia 27-10-2011 o 09:55:38 Phil White<[email protected]> >>>> napisał(a): >>>> >>>>> What I need is for a relay to automatically trigger (or, even better, >>>>> for 1 of 2 relays to trigger depending on Hi/Lo) *WITHOUT* any >>>>> commands or communication over the 1-wire network. 1-wire would be >>>>> used simply to program the device in the first place. >>>> >>>> There DS1821 it's almost what you want. >>>> >>>> http://www.maxim-ic.com/datasheet/index.mvp/id/2794 >>>> >>>> >>>> -- >>>> p4trykx >>>> >>>> ------------------------------------------------------------------------------ The demand for IT networking professionals continues to grow, and the demand for specialized networking skills is growing even more rapidly. Take a complimentary Learning@Cisco Self-Assessment and learn about Cisco certifications, training, and career opportunities. http://p.sf.net/sfu/cisco-dev2dev _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
