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Article #100Re: Best way to power array of LEDs?
From: Tong Narak
Date: Thu, 05 Dec 2002 07:19
Date: Thu, 05 Dec 2002 07:19
33 lines
2846 bytes
2846 bytes
Connect only one 3.01v still take ~150mA. Each LEDs has it own characteristic. So U can mix it in parallel as many company did it in headlight, brake light, etc. Tong Narak wrote: > > LED look like simple but it is not simple. > > In theory, you can't parallel LEDs. > But in practicle, I can parallel superbright LEDs. > Many car brake light, they parallel them too. > > I mixed by parallel 3.4v 3.5v 3.6v 3.01v (forward voltage LEDs @20mA) > with a 3.6v regulator. > > The forward current will vary automatic with the increment of > the input voltage. > the one 3.01v won't hog all current as someone said in this thread. > 3.01v take ~150mA > 3.4v take ~60mA > 3.5 take ~40mA > 3.6 take ~20mA > > when remove the 3.01v LED, another LEDs still take the current > at the same value. > > So. You can mix it in parallel. The lowest forward voltage LED > will not hog all current. > > Tong
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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: 1131b0,4ef4c9d4aea85e1f X-Google-Attributes: gid1131b0,public X-Google-Thread: 103407,4ef4c9d4aea85e1f X-Google-Attributes: gid103407,public X-Google-ArrivalTime: 2002-12-04 23:30:06 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!canoe.uoregon.edu!arclight.uoregon.edu!news.tufts.edu!uunet!dca.uu.net!news.cscoms.com!not-for-mail From: Tong Narak <tong@fanwap.com> 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: Thu, 05 Dec 2002 14:19:17 +0700 Organization: C.S. Communications Co. Ltd. Lines: 33 Message-ID: <3DEEFDF5.DFFA3679@fanwap.com> References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <Rsan9.14070$qh1.1622310@news.ca.inter.net> <ank9ep$lumv$1@hades.csu.net> <anku2n$5so$1@news.wave.co.nz> <7tGLdeAS6fn9EwBv@jmwa.demon.co.uk> <apvlvu$n2c$1@reader1.panix.com> <KVdHjAAjM3w9Ew8l@jmwa.demon.co.uk> <aq17gb$7ut$1@reader1.panix.com> <slrnasg1o7.1t5.Znospam+noZs_0211@hpb13799Z.Zboi.hpZ.com.invalid> <aseln1$jbb$1@reader1.panix.com> <Rm2H9.4457$5P3.213056@newsfeed.slurp.net> <4dqpuugil5jens3iu7uprml0hdjl5e5dqs@4ax.com> <3DEDB1CD.EF3761C7@fanwap.com> NNTP-Posting-Host: 203.170.158.191 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: news.cscoms.com 1039072770 96047 203.170.158.191 (5 Dec 2002 07:19:30 GMT) X-Complaints-To: abuse@cscoms.com NNTP-Posting-Date: Thu, 5 Dec 2002 07:19:30 +0000 (UTC) X-Mailer: Mozilla 4.8 [en] (Windows NT 5.0; U) X-Accept-Language: en