piclist 2001\01\07\125258a >
Thread: Decoupling App Note
www.piclist.com/techref/microchip/devices.htm?key=pic
flavicon
face BY : Dan Michaels email (remove spam text)



Morgan Olsson wrote:
>
>Any links or explanations to why they would break at lower voltage?
>What about zero voltage?  I have some 30 year old never electrified caps
and I checked they are still OK...
>

Probably NOT a good idea to use 30 YO components, "especially" caps, in
anything today. Back in the olden days [before I was born, BTW], the
floors of TV repair shops were littered with bad caps - died almost
as often as did vacuum tubes.
============


>I heard an guru once say that lagre electrolytics should be powered up
slowly first time, and then be held at nominal voltage.  As i understood it,
it would be because it could heal eventual cracks in the aluminium oxide.
>
>If it is because of cracks in the oxide, I find it more reasonable to
believe they wil heal more safely at lower voltage, but it is more risk of
violent destructive reactions at higher voltage.
>

The oxide layer does have a certain ability to regenerate itself.
You can probably find info on this via web search. I would
imagine this assumes the electrolyte hasn't totally dried out,
however.

- danM

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


<1.5.4.16.20010107104649.3727e70e@pop.dnvr.uswest.net>

See also: www.piclist.com/techref/microchip/devices.htm?key=pic
Reply You must be a member of the piclist mailing list (not only a www.piclist.com member) to post to the piclist. This form requires JavaScript and a browser/email client that can handle form mailto: posts.
Subject (change) Decoupling App Note

month overview.

new search...