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From: John Woodgate
Subject: Re: Wrestlemania Royale: Tantalum vs. Electrolytic Vs. Polys, etc.
Date: Mon, 28 Oct 2002 11:22:36 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Mon, 28 Oct 2002 12:50:27 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that The little lost angel wrote (in <email@example.com
t.sg>) about 'Wrestlemania Royale: Tantalum vs. Electrolytic Vs. Polys,
etc.', on Mon, 28 Oct 2002:
>On 27 Oct 2002 16:39:12 -0800, firstname.lastname@example.org (N. Thornton) wrote:
>>BTW dont put the cap acros the supply, it may object to that,
>>depending how its configured. Put it across the LED itself, or better
>>still half way thru the series R chain... you using a regulator? if
>>so, more complications...
> Hmm... not quite sure what you mean. Right now the
>configuration is something like this
> | | | | |
> | R R R R
> C | | | |
> | L L L L
> | | | | |
> Which I think is what you are recommending against, since I
>hope to use only one cap,
In that case, your ASCII schematic is correct (but conventionally upside
down; + should be at the top).
> where should I put it, since I can't put it
>in series with any of the Resistor/LED chain, and putting it at the
>end wouldn't be any different from putting it at the front right?
Right; you would need four caps, each across one LED
> No regulators, I've gone the way of tapping the +12V line.
But isn't this 12 V from a SMPS? If so, it's sort-of regulated anyway,
inside the SMPS. The 5 V supply is properly regulated, and the 12 V more
or less tracks the 5 V, except for some resistive loss in the 12 V
circuit that the 5 V regulator doesn't sense.
That's why it's difficult to understand why you are getting flicker. Or
are you are powering something additional from the 12 V supply?
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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