On Fri, 8 Jan 2010, Rob Conway wrote: > Why doesn't dallas have any analog type output chips ? Does anybody > actually control anything which requires an analog style output ?
I get the feeling that 1-wire has not been the success desired outside a few small niches (battery montoring, electronic barcoding and security tokens I think). As we have discussed in the past, the signalling system is marginal for the applications it is promoted for (remote sensing) due to the common ground and low tolerances. These issues are magnified greatly for output applications resulting in any practical 1wire output requiring its own powersupply, at which point you wonder why not just use a more standard protocol such as 422 or ethernet with far greater robustness. I've also found that the advantage of using just two wires isn't great in practice as the cheapest wire tends to be cat 5. If you have 4 twisted pairs there are many better options available. For short runs i2c is vastly more available. I think the biggest loss was losing the dual ported memory 1wire which allowed for arbitrary pic or arduino slaves. dallas seems keen to prevent that kind of application. Another useful output device would have been an i2c master 1wire slave. So I suggest that if you want to do output look for a different protocol. On that note, perhaps owfs should start thinking about generalising to support other networks? We have a beautiful design which would be useful for other applications. njh ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
