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Article #207Re: Best way to power array of LEDs?
From: budgie
Date: Tue, 08 Oct 2002 12:24
Date: Tue, 08 Oct 2002 12:24
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2146 bytes
On Mon, 07 Oct 2002 08:29:04 -0700, Lizard Blizzard <NOSPAM@rsccd.org> wrote: >John Woodgate wrote: >[snip] > >> A good guide is that the string should >> not take up more than half the lowest supply voltage. > >That will guarantee that the dissipation in the resistors exceeds the >LED dissipation. In other words, the circuit is not power efficient. and in an automotive brake circuit, power efficiency is about the LAST thing I would worry about.
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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 05:25:30 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!logbridge.uoregon.edu!arclight.uoregon.edu!enews.sgi.com!news.xtra.co.nz!news1.optus.net.au!optus!news.uwa.edu.au!nntp.waia.asn.au!nnrp.waia.asn.au!not-for-mail From: budgie@nowhere.cantech.net.au (budgie) Newsgroups: sci.electronics.components,sci.electronics.design,alt.engineering.electrical,aus.electronics,sci.electronics.repair Subject: Re: Best way to power array of LEDs? Date: Tue, 08 Oct 2002 12:24:23 GMT Organization: CanTech Online Lines: 14 Message-ID: <3da2ce50.3318688@news.cantech.net.au> 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> NNTP-Posting-Host: proteus.cantech.net.au X-Trace: nnrp.waia.asn.au 1034079767 15777 203.26.6.6 (8 Oct 2002 12:22:47 GMT) X-Complaints-To: usenet@nnrp.waia.asn.au NNTP-Posting-Date: Tue, 8 Oct 2002 12:22:47 +0000 (UTC) X-Newsreader: Forte Free Agent 1.21/32.243 Cache-Post-Path: proteus.cantech.net.au!unknown@ra126.cantech.net.au X-Cache: nntpcache 2.3.3 (see http://www.nntpcache.org/)