Article View: sci.electronics.components
Article #261Re: Best way to power array of LEDs?
From: Don Klipstein
Date: Sun, 06 Oct 2002 04:54
Date: Sun, 06 Oct 2002 04:54
17 lines
2154 bytes
2154 bytes
In article <anlb3a$lvte$1@hades.csu.net>, Lizard Blizzard wrote: >budgie wrote: > ><Snip> > >> In the auto situation, the simplest mitigation is to feed the >> resistor/LED chain thru an LM317 configured as a constant current >> source. Just the IC and one resistor added, and no voltage variation >> issue. > >The LM317 has a minimum current which may be greater than a single LED >can handle. It will work good for a hundred mA or more. In my experience, the LM317 (or maybe it's the LM317T) makes a decent 20 mA regulator. I use one in my "handy-dandy-standard" LED tester. - Don Klipstein (don@misty.com)
Technical Details
Message-ID:
<slrnapvgpf.hah.don@manx.misty.com>Path:
arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!canoe.uoregon.edu!logbridge.uoregon.edu!news.maxwell.syr.edu!sn-xit-03!sn-xit-01!sn-xit-04!supernews.com!140.174.20.10.MISMATCH!herald.uncanny.net!news.misty.com!donReferences:
<0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <3d9d452f.4128065@news.xs4all.nl> <P0HAA5Jd3Un9EwWS@ntlworld.com> <3d9d5392.5143261@news.cantech.net.au> <anlb3a$lvte$1@hades.csu.net>Show Full Headers
Complete Article Headers
X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 112d1e,4ef4c9d4aea85e1f X-Google-Attributes: gid112d1e,public X-Google-Thread: 1118be,4ef4c9d4aea85e1f X-Google-Attributes: gid1118be,public X-Google-Thread: 1131b0,4ef4c9d4aea85e1f X-Google-Attributes: gid1131b0,public X-Google-Thread: 103407,4ef4c9d4aea85e1f X-Google-Attributes: gid103407,public X-Google-Thread: 10d137,4ef4c9d4aea85e1f X-Google-Attributes: gid10d137,public X-Google-ArrivalTime: 2002-10-05 22:03:02 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!canoe.uoregon.edu!logbridge.uoregon.edu!news.maxwell.syr.edu!sn-xit-03!sn-xit-01!sn-xit-04!supernews.com!140.174.20.10.MISMATCH!herald.uncanny.net!news.misty.com!don From: don@manx.misty.com (Don Klipstein) Newsgroups: sci.electronics.components,sci.electronics.design,alt.engineering.electrical,aus.electronics,sci.electronics.repair Subject: Re: Best way to power array of LEDs? Date: Sun, 6 Oct 2002 04:54:42 +0000 (UTC) Organization: MGT Consulting Lines: 17 Message-ID: <slrnapvgpf.hah.don@manx.misty.com> References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <3d9d452f.4128065@news.xs4all.nl> <P0HAA5Jd3Un9EwWS@ntlworld.com> <3d9d5392.5143261@news.cantech.net.au> <anlb3a$lvte$1@hades.csu.net> NNTP-Posting-Host: manx.misty.com X-Trace: news.misty.com 1033880082 23374 198.137.254.20 (6 Oct 2002 04:54:42 GMT) X-Complaints-To: abuse@misty.com NNTP-Posting-Date: Sun, 6 Oct 2002 04:54:42 +0000 (UTC) User-Agent: slrn/0.9.6.2 (SunOS)