[sdiy] easy (?) decoupling cap question

[Harry Bissell Jr]

Google for "Harry Bissell" and capacitor and you
should get a paper I wrote on the subject.

Usually, decoupling caps are polar electrolytic
(if you are using electrolytic) or polar tantalum
(if tantalum) or ceramic (which are not polarity
sensitive).

I usually just use a .1uF ceramic at the power pin of
each chip...and one or two tantalums or electrolytics
for the whole board (if it is small).  For larger
boards I have SO many .1uF that the larger caps are
almost unnecessary

H^) harry


--- ian maslen <maz at imaslen.wanadoo.co.uk> wrote:
> Hi all.
> 
> I've built a few simple circuits before and now I'm
> trying to actually start understanding them. 
> Previously I've noticed that decoupling caps tend to
> be electrolytics but now I've got a few of ken
> stones pcbs and they seem to be bipolars.  I'm also
> building a cv utility module on stripboard (modified
> form the old modulus magazine) and really don't know
> what type of caps to use.  Does it even matter?
> 
> Any advice/pointers would be greatly appreciated,
> cheers
> 
> Maz
> 
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