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Article #95Re: Best way to power array of LEDs?
From: Gym Bob
Date: Fri, 06 Dec 2002 01:40
Date: Fri, 06 Dec 2002 01:40
48 lines
3768 bytes
3768 bytes
Have to read what he said first then insult later "Watson 'Atto Parsec' Name" <alondra101@hotmail.com> wrote in message news:MPG.18587d42aa1ac00e989db9@news.inreach.net... > In article <3DEDB1CD.EF3761C7@fanwap.com>, tong@fanwap.com talked about... > > 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 > > The above shows that the lower voltage LEDs hog most of the current. > > > 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. > > Well you just showed values that contradict what you say. > > > Tong > > [snip] > > > -- > @@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@ > My email address is whitelisted. *All* email sent to it > goes directly to the trash unless you put NOSPAM in the > Subject: line. alondra101 <at> hotmail.com > Don't be ripped off by the big book dealers. Go to the URL > that will give you a choice and save you money(up to half). > http://www.everybookstore.com You'll be glad you did! > Just when you thought you had all this figured out, the gov't > changed it: http://physics.nist.gov/cuu/Units/binary.html > @@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 112d1e,4ef4c9d4aea85e1f X-Google-Attributes: gid112d1e,public X-Google-Thread: 103407,4ef4c9d4aea85e1f X-Google-Attributes: gid103407,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-ArrivalTime: 2002-12-05 17:40:37 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!feed.cgocable.net!newsfeed.torontointernetxchange.net!radon.golden.net!not-for-mail From: "Gym Bob" <none@spammy.com> Newsgroups: sci.electronics.components,sci.electronics.design,alt.engineering.electrical,aus.electronics,sci.electronics.repair References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <Rsan9.14070$qh1.1622310@news.ca.inter.net> <ank9ep$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$5P3.213056@newsfeed.slurp.net> <4dqpuugil5jens3iu7uprml0hdjl5e5dqs@4ax.com> <3DEDB1CD.EF3761C7@fanwap.com> <MPG.18587d42aa1ac00e989db9@news.inreach.net> Subject: Re: Best way to power array of LEDs? Lines: 50 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Message-ID: <ieTH9.316$wR5.20725852@radon.golden.net> Date: Thu, 5 Dec 2002 20:40:33 -0500 NNTP-Posting-Host: 216.75.176.61 X-Complaints-To: abuse@golden.net X-Trace: radon.golden.net 1039138830 216.75.176.61 (Thu, 05 Dec 2002 20:40:30 EST) NNTP-Posting-Date: Thu, 05 Dec 2002 20:40:30 EST Organization: Golden Triangle On Line Inc.