From: Lizard Blizzard
Subject: Re: Best way to power array of LEDs?
Date: Wed, 06 Nov 2002 14:40:46 -0800
References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <3DC84D06.4F43DDE9@fanwap.com>
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Nucharin W. Jansen wrote:
> To make the principles perfectly clear, LEDs emit photons in an
> ratio of the amount of CURRENT (hear that?...**current!!) that passses
> them. Voltage isn't even in the equation!!
Er, that's about the most foolish thing I've heard someone speak this
week. As you (should) know, it takes voltage to push the current thru
anything other than a superconductor in the cryogenic world.
>> The voltage that appears
> across an
> LED is a RESULT of the current that you are pushing through it, not the
> way around!.
Well, if the voltage across the LED is substantially below that needed
to forward bias the diode, then there is no current thru the diode. So
the result of your convoluted statement is that the voltage across the
LED is the result of zero current flow for the first several hundred
Like any diode, this voltage (called the forward voltage)
> to be relatively constant, and relatively independent of the current.
> (watch my lips closely, now!) the value of this voltage is basically
> irrelivant! Forget about it! Don't even mention the "V" word when
> dealing with
Watch my lips closely now: You can't have one without the other. So
what other brilliant revelations have you got to tell us, Sherlock?
Maybe you'd like to next explain your perpetual motion machine.
> There! Got that off my chest.
----------------(from OED Mini-Dictionary)-----------------
PUNCTUATION - Apostrophe
Incorrect uses: (i) the apostrophe must not be used with a plural
where there is no possessive sense, as in ~tea's are served here~;
(ii) there is no such word as ~her's, our's, their's, your's~.
Confusions: it's = it is or it has (not 'belonging to it'); correct
uses are ~it's here~ (= it is here); ~it's gone~ (= it has gone);
but ~the dog wagged its tail~ (no apostrophe).
----------------(For the Apostrophe challenged)----------------
From a fully deputized officer of the Apostrophe Police!