From: Lizard Blizzard
Subject: Re: Best way to power array of LEDs?
Date: Fri, 08 Nov 2002 16:05:24 -0800
References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <2Qan9.3129$cS4.firstname.lastname@example.org> <3DC843FE.4A25FFF3@fanwap.com> <3DC99AD4.2AB0FE52@fanwap.com>
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John Woodgate wrote:
> I read in sci.electronics.design that Lizard Blizzard
> wrote (in ) about 'Best way to power array
> of LEDs?', on Thu, 7 Nov 2002:
>>Not true. Here's one that's not that complicated and runs a 3.5V white
>>or blue LED off 4 AA Ni-Cds of from 3.8 to 5.6V depending on their state
>>of charge. As he says, it requires only 0.2V more than the LEDs. I
> If you mean the ASCII art thing you posted before, 2 transistors and 2
No, you trimmed the URL off! Here it is again.
> resistors is marginal for 'simple' in my book. And the voltage drop must
> be something over 1.2 V, not 0.2 V. There are two Vbe voltages stacked
> up. 1.2 is more than 1.09.
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