From: Watson 'Atto Parsec' Name
Subject: Re: Finally found specs on these LEDs
References: <0001HW.B9C26E7400A7161B165FEAC0@news.covad.net> <4ICn9.46867$xI5.9321@sccrnsc02> <0001HW.B9C6E6F901221AB6165FEAC0@news.covad.net>
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Date: Thu, 10 Oct 2002 06:09:17 -0700
NNTP-Posting-Date: Thu, 10 Oct 2002 06:04:03 PDT
Organization: InReach Internet
In article <0001HW.B9C6E6F901221AB6165FEAC0@news.covad.net>,
email@example.com talked about...
> If I choose to use an LM317 current limiter, do I use this in place of the
> dropping resistor, or ...?
Note one thing that isn't apparent in ths discussions. The LM317 requires
a minimum voltage difference across it to work properly. This is 2V, I
believe, as is many other fixed regulators. So if you have 2V across the
chip, and 1.25V across the current seetting resistor, that's 3.25V munimum.
if you go below this, it may not work. I don't have any experience with
this current reg circuit, but with V reg, if you go below th 2V, the chip
just drops out of regulation.
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you put NOSPAM in the
Subject: line. alondra101 hotmail.com
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Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html