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 >>> >>> >>> ------------------------------------------------------------------------------ >>> 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 >> >> ------------------------------------------------------------------------------ >> 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 >> >> > > ------------------------------------------------------------------------------ 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
