[sdiy] RE: ICL8038

[danial stocks]

maybe someone could explain the series back to back electros.. they still 
get reverse polarity for 1/2 cyc of ac each.. so why does this then be the 
way of not blowing them up when you need to use them for AC coupling without 
a dc offset?
Dan

>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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