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Article #215Re: Best way to power array of LEDs?
From: daestrom
Date: Wed, 09 Oct 2002 00:49
Date: Wed, 09 Oct 2002 00:49
21 lines
2578 bytes
2578 bytes
"Lizard Blizzard" <NOSPAM@rsccd.org> wrote in message news:antbnf$mt73$1@hades.csu.net... > John Woodgate wrote: > I came across this URL today. It's about making resistors from, well, > read it and you'll see. Go down to the design calculations where he > shows how it's necessary to dissipate the heat built up. Pretty cool. > > http://www.fortunecity.com/greenfield/bp/16/rwater.htm > > Reminds me of shipyard work in the Navy. When testing ship's service turbine generators, we ran 3-phase cable up to the pier and bolted each phase to a separate steel plate suspended above a large tank of salt-water. To load the generators down fully and "run 'em in", the three plates were slowly lowered into the saltwater while a fire pump kept the tank full. Able to 'load' a 2000kw generator for four hours to complete the tests this way. daestrom
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 112d1e,4ef4c9d4aea85e1f X-Google-Attributes: gid112d1e,public X-Google-Thread: 1118be,4ef4c9d4aea85e1f X-Google-Attributes: gid1118be,public X-Google-Thread: 10d137,4ef4c9d4aea85e1f X-Google-Attributes: gid10d137,public X-Google-Thread: 1131b0,4ef4c9d4aea85e1f X-Google-Attributes: gid1131b0,public X-Google-Thread: 103407,4ef4c9d4aea85e1f X-Google-Attributes: gid103407,public X-Google-ArrivalTime: 2002-10-08 17:50:01 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!newsfeed1.cidera.com!Cidera!cyclone.nyroc.rr.com!cyclone-out.nyroc.rr.com!twister.nyroc.rr.com.POSTED!not-for-mail From: "daestrom" <daestrom@twcny.rr.com> Newsgroups: sci.electronics.components,sci.electronics.design,alt.engineering.electrical,aus.electronics,sci.electronics.repair References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <Rsan9.14070$qh1.1622310@news.ca.inter.net> <2Qan9.3129$cS4.107732@news2.tin.it> <6aa7QNAh$Yn9EwS7@jmwa.demon.co.uk> <ans94t$moab$2@hades.csu.net> <95qKYRBfvbo9EwZu@jmwa.demon.co.uk> <antbnf$mt73$1@hades.csu.net> Subject: Re: Best way to power array of LEDs? Lines: 23 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <X2Lo9.102082$kk7.21489916@twister.nyroc.rr.com> Date: Wed, 09 Oct 2002 00:49:59 GMT NNTP-Posting-Host: 66.24.9.65 X-Complaints-To: abuse@rr.com X-Trace: twister.nyroc.rr.com 1034124599 66.24.9.65 (Tue, 08 Oct 2002 20:49:59 EDT) NNTP-Posting-Date: Tue, 08 Oct 2002 20:49:59 EDT Organization: Road Runner