On 20 December 2012 12:40, Stephen Richards <okayjustalittle@...> wrote:
only be charged according to their polarity. If you charge them in
reverse, they'll conduct instead of acting like a capacitor, and will
eventually dry out, or if connected in circuits where they can conduct
large currents (for example as decoupling capacitors on the power
supply rails) explode.
I'm not very fond of the name bipolar capacitor, however, since
bipolar usually indicates that something IS polarized rather than that
it ISN'T. I much prefer the term non-polarized, or NP.
If you are hard pressed, you can emulate the function of an NP cap by
placing two polarized caps of approximately double the value in
series, "back to back", that is both the negative sides, or both the
positive sides, pointing "inward". Two 2.2 uF caps should be good
enough for this application.
Another possible solution in this case is to find a ceramic capacitor
(either a hole mount or even a surface mount one) that fits the
footprint. Capacitor manufacturing has come a long way since 1982.
just make sure the capacitors are rated 25 V tolerant or higher.
--
/Ove
Blog: <http://blog.gg8.se/>
"Here is Evergreen City. Evergreen is the color of green forever."
> Hi Ken and allNormally, electrolytic capacitors are polarized, meaning that they can
>
> I'm unfamiliar with 'BP' caps , does this mean bipolar ? Can i just use
> 1uF garden variety electrolytics.
only be charged according to their polarity. If you charge them in
reverse, they'll conduct instead of acting like a capacitor, and will
eventually dry out, or if connected in circuits where they can conduct
large currents (for example as decoupling capacitors on the power
supply rails) explode.
I'm not very fond of the name bipolar capacitor, however, since
bipolar usually indicates that something IS polarized rather than that
it ISN'T. I much prefer the term non-polarized, or NP.
If you are hard pressed, you can emulate the function of an NP cap by
placing two polarized caps of approximately double the value in
series, "back to back", that is both the negative sides, or both the
positive sides, pointing "inward". Two 2.2 uF caps should be good
enough for this application.
Another possible solution in this case is to find a ceramic capacitor
(either a hole mount or even a surface mount one) that fits the
footprint. Capacitor manufacturing has come a long way since 1982.
just make sure the capacitors are rated 25 V tolerant or higher.
--
/Ove
Blog: <http://blog.gg8.se/>
"Here is Evergreen City. Evergreen is the color of green forever."