Ceramic caps work just fine.  That's what I use. 
They're non-polarized & cheap, don't explode, and I've
recently noticed ceramic caps and a max232 chip on
some tank gauging hardware that we use out here in the
chemical plant, that's been in service for years.  If
it's the wrong cap for the job, then I'm not the only
one making that mistake.

-Mark


--- David Van Horn <dvanhorn@microbrix.com> wrote:

> > Oh, huh, I've never looked at them that closely. 
> I'll be darned if
> > there's not a little plus sign on them.  Huh. :) 
> That does explain
> > things... :)
> 
> They have a habit of exploding if connected
> backwards, across anything
> that can deliver much current..  Or forwards for
> that matter, if the
> risetime on the voltage is too quick.
> 
> 
> 
> 
> 
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