From: Lizard Blizzard
Subject: Re: Best way to power array of LEDs?
Date: Fri, 04 Oct 2002 07:45:13 -0700
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Jerry G. wrote:
> Each LED must have its own series resistor.
NO, the rule is that is very unwise to connect LEDs in parallel. There
is no problem connecting multiple LEDs in series, contrary to your claim
above. LEDs connected in parallel must be very closely matched for
forward voltage drop so that one LED will not hog the current and
> 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 2.1V
across them. Yellow and green LEDs have a higher voltage, up to 2.4V.
Blue and white are 3.4 to 3.6V.
> LED's cannot be wired in parallel to each other being fed from one
> resistor. They can not also be wired in series with each other.
BZZZT! WRONG! See above.
Sheesh! Such misinformation!
Re: "LED's", see my .sig below.
> Jerry Greenberg GLG Technologies GLG
> WebPage http://www.zoom-one.com
> Electronics http://www.zoom-one.com/electron.htm
> Instruments http://www.zoom-one.com/glgtech.htm
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