Re: Best way to power array of LEDs?

Article View: sci.electronics.components

Article #158

Back to sci.electronics.components Previous Next

#158

From: Ralph Wade Phillips
Date: Tue, 05 Nov 2002 12:57

46 lines
3352 bytes

Howdy!

"Tom Del Rosso" <please-no.spam.tdnews@att.net> wrote in message
news:cRLx9.26452$VJ5.1622624@bgtnsc05-news.ops.worldnet.att.net...
> "Dave VanHorn" <dvanhorn@cedar.net> wrote in
> message news:3ZKcndAgKa3r71qgXTWc3Q@comcast.com...
> >
> > The alternator is only part of the system.
> > The voltage regulator does the controlling.
> > It limits the output of the alternator, both in current, and voltage,
> to a
> > safe maximum.
> >
> > When you apply a load, the system voltage begins to droop, and the
> voltage
> > regulator applies more current to the alternator's field coil (which
> is the
> > rotating one)  This causes more current out the stator coils and
> diodes, and
> > brings up the system voltage.

>
> I had no idea a car's regulator used a feedback path through the
> alternator.

        It doesn't.  But it DOES monitor the system voltage, and at lower
voltages increases the field current.

        Which isn't the same thing as a feedback loop THROUGH the alternator
...

>
>
> > > In other words does a generator precisely convert a higher
> > > load current into more mechanical resistance?
> >
> > Both generators and alternators do this, by different means.
> >
> > Before computer driven engines, you used to notice the loading effect
> more.
> > Now, the computer maintains idle at a preset speed pretty well, unless
> > something's very wrong with the system.
>
> Thanks Dave.

        RwP

Technical Details

Message-ID: <aq8f4n$7fb40$1@ID-81734.news.dfncis.de>

Path:

arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!syros.belnet.be!news.belnet.be!feed.news.nacamar.de!fu-berlin.de!uni-berlin.de!ralphp.microgear.NET!not-for-mail

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$1@reader1.panix.com> <aq0h2t$nv1$1@thorium.cix.co.uk> <us7t1tk9t9t795@corp.supernews.com> <J_xx9.45419$Mb3.2215008@bgtnsc04-news.ops.worldnet.att.net> <useffdcqh8hne7@corp.supernews.com> <uMIx9.46613$Mb3.2298793@bgtnsc04-news.ops.worldnet.att.net> <3ZKcndAgKa3r71qgXTWc3Q@comcast.com> <cRLx9.26452$VJ5.1622624@bgtnsc05-news.ops.worldnet.att.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: 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-Thread: 1118be,4ef4c9d4aea85e1f
X-Google-Attributes: gid1118be,public
X-Google-ArrivalTime: 2002-11-05 04:55:55 PST
Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!syros.belnet.be!news.belnet.be!feed.news.nacamar.de!fu-berlin.de!uni-berlin.de!ralphp.microgear.NET!not-for-mail
From: "Ralph Wade Phillips" <ralphp@techie.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: Tue, 5 Nov 2002 06:57:30 -0600
Organization: Phillips Enterprises
Lines: 48
Message-ID: <aq8f4n$7fb40$1@ID-81734.news.dfncis.de>
References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net>  <Rsan9.14070$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$1@reader1.panix.com> <aq0h2t$nv1$1@thorium.cix.co.uk> <us7t1tk9t9t795@corp.supernews.com> <J_xx9.45419$Mb3.2215008@bgtnsc04-news.ops.worldnet.att.net> <useffdcqh8hne7@corp.supernews.com> <uMIx9.46613$Mb3.2298793@bgtnsc04-news.ops.worldnet.att.net> <3ZKcndAgKa3r71qgXTWc3Q@comcast.com> <cRLx9.26452$VJ5.1622624@bgtnsc05-news.ops.worldnet.att.net>
NNTP-Posting-Host: ralphp.microgear.net (63.65.144.1)
X-Trace: fu-berlin.de 1036500952 7842944 63.65.144.1 (16 [81734])
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106

Reply to Parent Message