> > And what about when you have an out-and-back path through the same CAT5, to > maintain a single chain and avoid a "star" configuration? Or when you have > other signals (relay coils!) in the same CAT5? I can't say I've tried the > experiment of putting ground and data on different twisted pairs, but since I > eliminated all the star branching from my (parasitic) bus (which always keeps > data and ground on the same twisted pair) I can go for months of reading > every ten seconds without a single error. Despite the total path now being > much longer due to out-and-back. > > One other trick that seemed to help stop the last few rare errors on this > long, perilous route was adding termination on the far end - a (reverse > biased) 1N5711 Schottky diode and a 1.5KE20A-T TVS in parallel. > > I know, separate cables for 1-wire would be better, but it seems no matter > how much cable I pull around this house, there is never enough!
I have loads of star branching, but I provide power to every device. As I extend it, when it goes flakey, I just add another DS9490R and split off another section of bus. Absolutely agree on there never being enough cable. Cheers ------------------------------------------------------------------------------ _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
