From: John Woodgate
Subject: Re: Parallel LEDs calculation
Date: Mon, 16 Sep 2002 15:50:29 +0100
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Mon, 16 Sep 2002 18:08:59 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Tim Williams
wrote (in )
about 'Parallel LEDs calculation', on Mon, 16 Sep 2002:
>Here's a real stumper: vitreous wirewound resistors. :^)
>Especially the variable ones.
>Interestingly, both types appear to still be quite modern, as Mouser
Well, quite *current*; the *vitreous-enamel coated* wire wound resistor
(that's the full name) dates from around 1940, IIRC.
The cement-coated types are cheaper but larger. The VE ones are a menace
if run near rating, because they don't look as if they have a surface
temperature of 250 C or so, but just touch one ....
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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