ICL8038

[Happy Harry]

Non Polar or Bipolar electrolytics are still a loser
IMHO for timing circuits. I'd parallel some polys myself.

Watch out for ripple current in bipolars... you can still
kill them with AC waveforms.... but usually this is limited
to speaker crossovers, etc.

Some say that returning the center tap of the series caps
to the negative rail through a real high value resistor can
help keep series electrolytics happy.

I don't like 'em... no no!

H^) harry


>From: "Lappalainen, Janne" <Janne.Lappalainen at silja.com>
>To: "'Glen'" <mclilith at ezwv.com>, synth-diy at node12b53.a2000.nl
>Subject: RE: ICL8038
>Date: Thu, 25 Jan 2001 11:19:07 +0200
>
>
> > -----Original Message-----
> > From: Glen [mailto:mclilith at ezwv.com]
> >
> > At 01:06 AM 1/25/01 , Lappalainen, Janne wrote:
> >
> > >Can the timing capacitor be made by connecting two
> > >electrolytes in series? I don't wan't to invest too much
> > money on this by
> > >buying large ordinary caps.
> >
> > I think you meant to say parallel, instead of series. Capacitors in
> > parallel will have a larger total capacitance. You simply add the
> > individual values together to get the total for the parallel
> > combination.
> >
>
>In fact I really meant series, since it makes the electrolytes 
>non-polarized
>(if you connect eg. the + - poles together and - - poles to the circuit). 
>It
>halves the capacity, but it is still much cheaper to buy two 47 uF
>capacitors than eg. one 20 uF polystyrene. However, the electrical
>properties are not nearly as good as with 'normal' capacitors.
>
>Janne
>
>Listen to my music at:
>http://www.mp3.com/MountainCowboy

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