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Article #222Re: Best way to power array of LEDs?
From: Watson 'Atto Parsec' Name
Date: Sun, 06 Oct 2002 13:55
Date: Sun, 06 Oct 2002 13:55
30 lines
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2919 bytes
In article <slrnapvhak.hah.don@manx.misty.com>, don@manx.misty.com talked about... [snip] > What I might worry about is the current surge that flows while the > filament is warming up. Probably not as much a problem with 3 and 5 mm > LEDs as the really high current ones with rated peak current only about > 1.4 times their rated continuous current. It seems that the way to design around this is to use a resistor of a value that would be appropriate for rated current at the minimum voltage that would be expected, such as 10 volts. Then use the lamp to take u the remaining difference, such as 13.8V minus 10V, or 3.8V. This would make use of 6V low current lamps, which would never be run at maximum voltage, which would be 16 or so volts. > - Don Klipstein (don@misty.com) > -- @@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: 10d137,4ef4c9d4aea85e1f X-Google-Attributes: gid10d137,public X-Google-Thread: 1131b0,4ef4c9d4aea85e1f X-Google-Attributes: gid1131b0,public X-Google-Thread: 1118be,4ef4c9d4aea85e1f X-Google-Attributes: gid1118be,public X-Google-Thread: 103407,4ef4c9d4aea85e1f X-Google-Attributes: gid103407,public X-Google-ArrivalTime: 2002-10-06 06:47:48 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!bloom-beacon.mit.edu!news-out.cwix.com!pullfeed!newsfeed.cwix.com!newsfeed1.cidera.com!Cidera!news.inreach.com!not-for-mail From: Watson 'Atto Parsec' Name <alondra101@hotmail.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? Message-ID: <MPG.1809e0ae9adc044a989c0f@news.inreach.net> References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <3d9d452f.4128065@news.xs4all.nl> <P0HAA5Jd3Un9EwWS@ntlworld.com> <ankkbu$lv9i$1@hades.csu.net> <0001HW.B9C33DA500C07DD2165FEAC0@news.covad.net> <slrnapvhak.hah.don@manx.misty.com> X-Newsreader: MicroPlanet Gravity v2.60 Lines: 30 Date: Sun, 6 Oct 2002 06:55:31 -0700 NNTP-Posting-Host: 209.209.66.74 X-Trace: news.inreach.com 1033912053 209.209.66.74 (Sun, 06 Oct 2002 06:47:33 PDT) NNTP-Posting-Date: Sun, 06 Oct 2002 06:47:33 PDT Organization: InReach Internet