[sdiy] emulating bi-polar capacitors

Neil Johnson neil.johnson71 at gmail.com
Tue Feb 15 20:21:18 CET 2022


Hi Danjel,

> With high prices and scarcity of bi-polar caps I am trying to find the best way to emulate them
> using back-to-back polarized electrolytics.
>
> The most common solution I have seen is to simply connect them in series (negative terminal to negative terminal).   So if you needed 47u NP  you would take two 100u in series.

Yes that's the usual setup.  SSL would sometimes bias the mid-point to
one of the rails through a very-high value resistor (mega ohms):
https://www.gyraf.dk/gy_pd/ssl/ssl_82e26.gif

Cheers,
Neil



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