Re: Best way to power array of LEDs?

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#119

From: Tim Shoppa
Date: Mon, 02 Dec 2002 15:03

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"Tom Del Rosso" <please-no.spam.tdnews@att.net> wrote in message news:<uMIx9.46613$Mb3.2298793@bgtnsc04-news.ops.worldnet.att.net>...
>  If I
> draw less power than the alternator can supply, isn't it just wasting
> some of that power because of the non-ideal properties of the
> alternator?  In other words does a generator precisely convert a higher
> load current into more mechanical resistance?

Yes, it does.  OK, the "precisely" isn't all that good because there are
mechanical losses outside the generator coils, but electromagnetically it's
pretty much spot-on so after you get above the lowest RPM's where mechanical
losses dominate.  Playing with a hand-crank generator is an excellent
exercise for demonstrating this.

Tim.

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From: shoppa@trailing-edge.com (Tim Shoppa)
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: 2 Dec 2002 07:03:37 -0800
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