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From: "Roger Dewhurst"
Subject: Re: Best way to power array of LEDs?
Date: Sat, 5 Oct 2002 08:26:25 +1200
Organization: Wave Internet Services
NNTP-Posting-Date: 4 Oct 2002 20:35:35 GMT
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
"Lizard Blizzard" wrote in message
> Jerry G. wrote:
> > Each LED must have its own series resistor.
> NO, the rule is that is very unwise to connect LEDs in
> is no problem connecting multiple LEDs in series, contrary to
> above. LEDs connected in parallel must be very closely matched
> forward voltage drop so that one LED will not hog the current
> > Most of these LED's work
> > at about 30 to 40 ma with about 1.6 VDC across them. You
should be able
> Most IR LEDs have 1.6V drop. Most modern red LEDs have 1.9 to
> across them. Yellow and green LEDs have a higher voltage, up
> Blue and white are 3.4 to 3.6V.
> > LED's cannot be wired in parallel to each other being fed
> > resistor. They can not also be wired in series with each
> BZZZT! WRONG! See above.
> Sheesh! Such misinformation!
> Re: "LED's", see my .sig below.
What about putting in a voltage doubler or tripler and then
doubling or tripling the number of LEDs in series?
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