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Article #294Re: Best way to power array of LEDs?
From: Lizard Blizzard
Date: Fri, 04 Oct 2002 21:08
Date: Fri, 04 Oct 2002 21:08
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2609 bytes
Keith Wootten wrote: [snip] > My bicycle rear light is an array of 50 LEDs from RS components which > are arranged in a series/parallel configuration with a nominal Vf of 9V5 > IIRC. Using two small paralleled 5V lamps (can't remember the type - > selected from a junk box) the current swings 2:1 for a 14V-10V supply. Do you mean in parallel with the LEDs or the lamps are in parallel with each other, then in series withg the LEDs. In either case, why do you need 50 LEDs?? You oughta look like a christmas tree! > In my case, it's also a useful low battery warning - the filament lamp > goes out long before the LEDs. > Cheers -- ----------------(from OED Mini-Dictionary)----------------- PUNCTUATION - Apostrophe Incorrect uses: (i) the apostrophe must not be used with a plural where there is no possessive sense, as in ~tea's are served here~; (ii) there is no such word as ~her's, our's, their's, your's~. Confusions: it's = it is or it has (not 'belonging to it'); correct uses are ~it's here~ (= it is here); ~it's gone~ (= it has gone); but ~the dog wagged its tail~ (no apostrophe). ----------------(For the Apostrophe challenged)---------------- From a fully deputized officer of the Apostrophe Police!
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 112d1e,4ef4c9d4aea85e1f X-Google-Attributes: gid112d1e,public X-Google-Thread: 10d137,4ef4c9d4aea85e1f X-Google-Attributes: gid10d137,public X-Google-Thread: 1118be,4ef4c9d4aea85e1f X-Google-Attributes: gid1118be,public X-Google-Thread: 103407,4ef4c9d4aea85e1f X-Google-Attributes: gid103407,public X-Google-Thread: 1131b0,4ef4c9d4aea85e1f X-Google-Attributes: gid1131b0,public X-Google-ArrivalTime: 2002-10-04 14:17:07 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!canoe.uoregon.edu!newshub.sdsu.edu!newshub.csu.net!not-for-mail From: Lizard Blizzard <NOSPAM@rsccd.org> 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: Fri, 04 Oct 2002 14:08:54 -0700 Organization: CSUnet Lines: 31 Message-ID: <ankvu5$lv79$1@hades.csu.net> References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <3d9d452f.4128065@news.xs4all.nl> <P0HAA5Jd3Un9EwWS@ntlworld.com> NNTP-Posting-Host: 204.75.249.20 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.1) Gecko/20020826 X-Accept-Language: en-us, en