On Sun, Oct 23, 2011 at 10:20 AM, Silvano Gai <[email protected]> wrote: > If you want to adapt the impedance use a balun > http://en.wikipedia.org/wiki/Balun > > I use them for the opposite purpose (to carry CCTV over Cat5) and they > work great. > http://www.anykeeper.com/china-wholesale-utp-video-balun.html > > -- Silvano > > > P.S. You can also reuse your coax to run Ethernet > http://www.tomshardware.com/news/dlink-wifi-coax-ethernet,7587.html > > > > On 10/23/11 5:48 AM, Colin Law wrote: >> On 23 October 2011 13:37, Phil White<[email protected]> wrote: >>> Interesting question! >>> I can't instantly see why not. Obviously you are limited to just signal and >>> return (I want to have power on one of my lines also), but that can be >>> worked around. >>> All the books suggest cat5 cable. Well, I'm old enough to have had ethernet >>> system over coax, so why not 1-wire over coax? >>> The only caveat is that I am no good at calculations and planning where I >>> have to worry about impedance. Actually, a damn good question, since I am >>> currently rewiring my network, and could adopt this approach. Better than >>> the 8-core telephone cable I currently use, I would think. >> I don't think the resistive impedance would be a problem, I am sure >> there is a lot more copper in coax than in each pair of cat5, so >> simple volt drop would not be an issue. I think the capacitance might >> be the problem rounding off the signals, but I don't know enough about >> the physics to know the answer. I am sure it would work over a >> "short" distance but not over a "long" distance. The question is what >> are short and long in this context? >> >> I am not sure that the ethernet over coax point is valid as I assume >> the drivers in such an interface would be designed to drive coax. >> >>> Keep us informed, please. >> Will do. >> >> Colin >> >>> Phil >>> >>> >>> On 22 October 2011 13:49, Colin Law<[email protected]> wrote: >>>> Has anyone tried sending 1-wire through tv aerial coax cable? I ask >>>> as my house is wired with aerial cable which I am not using and >>>> potentially I could use it for 1-wire. Obviously it would be far from >>>> ideal, but it occurs to me that it might work. I could (and probably >>>> will) try it, but I will need to get some connectors to do that so I >>>> thought it worth asking here first. >>>> >>>> Colin >>>> ------------------------------------------------------------------------------
Hello! Agreed to the point about using a BALUN. I have some here, including the ones that were wired to match the 3278 specs for IBM terminals. And about that DLINK device, that's the first thing that company has done right. ----- Gregg C Levine [email protected] "This signature fought the Time Wars, time and again." ------------------------------------------------------------------------------ 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
