From: Lizard Blizzard
Subject: Re: Best way to power array of LEDs?
Date: Mon, 07 Oct 2002 17:54:41 -0700
References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <firstname.lastname@example.org> <email@example.com>
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Don Klipstein wrote:
> In article , Lizard Blizzard wrote:
>>>In the auto situation, the simplest mitigation is to feed the
>>>resistor/LED chain thru an LM317 configured as a constant current
>>>source. Just the IC and one resistor added, and no voltage variation
>>The LM317 has a minimum current which may be greater than a single LED
>>can handle. It will work good for a hundred mA or more.
> In my experience, the LM317 (or maybe it's the LM317T) makes a decent
> 20 mA regulator. I use one in my "handy-dandy-standard" LED tester.
> - Don Klipstein (firstname.lastname@example.org)
But what's the minimum current? I know for a voltage reg it's 5 mA.
I've never experimented with the LM317 in current reg mode.
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