On Thu, May 14, 2009 at 14:33, Jan Kandziora <j...@gmx.de> wrote: > Am Donnerstag, 14. Mai 2009 schrieb Rob Fugina: >> I need to get some 1-wire weather instruments mounted away from my >> house, on a post about 75 ft away. This worries me because of how the >> system basically becomes an antenna. Nearby lightning strikes would >> wreak havok back at the bus master. >> > A lightning striking a pole only ~25m away would shift earth level very much > and damage most of your computer equipment anyway. It makes no sense just to > protect one input -- You'll have to protect all inputs, especially the mains. > > Where exactly do you live? A single house or an urban area? Are thunderstorms > frequent? How dry is the soil at your area? These are important questions if > you ask how to protect your equipment from lightning.
Ok, you're right, and I'm not really trying to protect myself from a direct strike. But having a 75m antenna sticking out into my back yard does seem to be asking for nearby lightning, or overhead lightning, to induce significant current in that wire -- or am I wrong? I live in the far suburbs -- very few trees, 1-acre lots, houses 50m to 150m apart. The soil's pretty wet right now, and I would say it never gets all that terribly dry. In answer to Paul's suggestion, I hadn't really considered running a full-on WiFi node on that pole, but I'm sure that's a possibility, too. When I said "wireless" I was thinking of something at a much lower level -- at the 1-wire level, in particular... But I've been thinking about this more now, and I've got an NSLU2 hiding somewhere in my house, and I have a pair of 10base-F transceivers that I got at a hamfest a while back. Now if I could just power the NSLU2 and a transceiver and bury some fiber, that'd 100 times more reliable than wireless, and perfectly isolated. Now I wonder what it would take to power them... Rob ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
