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From: "Nucharin W. Jansen"
Subject: Re: Best way to power array of LEDs?
Date: Wed, 06 Nov 2002 05:58:14 +0700
Organization: C.S. Communications Co. Ltd.
NNTP-Posting-Date: Tue, 5 Nov 2002 22:58:17 +0000 (UTC)
To: Bob Wilson
X-Mailer: Mozilla 4.8 [en] (Windows NT 5.0; U)
I see. I will use switching current regulator now.
>LEDs are not about voltage. They don't care about voltage. I've run them at
>2.5V. I've run them at 120V AC. LEDs are current devices and have a brighter
>response to more current. So any LED supply is about current management.
You are absolutely right. This question about Voltage and LEDs just
coming up time and time again! You'd think that those posing it would
trouble to learn the most elementary basics of what they are trying to
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!! The voltage that appears
LED is a RESULT of the current that you are pushing through it, not the
way around!. 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
There! Got that off my chest.
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