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Thanks Don...for bringing it up, but you're missing Detail~
CAPs in Series, function like RESISTORs in PARALLEL!
[If 2 equal R's in parallel, or equal C's in series, gives 1/2]
If you want to make a 10-mfd (NP) CAP, you will need to
wire two 20-mfd Polarized Caps in Series (back-to-back).
Placing two 10-mfd caps in series...will yield, only 5-mfd.
Some (audio-freq/low signal) applications are not critical,
and while nice to get NP performance...reality prevailes?
Power-distribution & motors DO-NOT use non-polarized!
Most electrolytic caps, were manufactured with negative
connection to the outside of the caps physical package,
which is best in HVDC applications with case grounded.
It's not
wise when placed in series (floating) no grounds!
Ok, my point being...wire 2 caps (-) to (-)...not (+) to (+),
which helps to isolate, contacting outer (-) can = zaps..!
Also note, if two Caps are equal-capacity (not likely) you
can then operate new/(NP) series combo-caps, at higher
WVDC/(operating-voltage) than original cap specification.
For safety reasons, cap cannot be assumed to be same
capacity of any other-caps that it is being paired-up with.
As a ckt. designer, if I placed 2 (35-wvdc) caps in series,
then might run combos...up to maybe 50-vdc...not to 70!
FYI: If CAP VALUES are NOT EQUAL, then for SAFETY
in AC (signal) voltage distribution...never exceed, WVDC
values identified for the lowest
capacitor in series-string!
Hope my simplified (equation free) version, was helpfull?
Parallel Caps/(Series Resistor) math is very simple, but
equations are not that easy to represent here via typing.
[Refer to any elementry electronics book, with formulas]
^BATZCUZ^
P.S. I know, thinking what does some little BAT know,
about electronics theory...(LoL) we had SONAR First...
took humans eons to discover Batz (midnight) Secrets.
========================================
Don Hildreth <w6nrw2@...> wrote:
Just because I haven't seen it mentioned here.
And just because there may be thousands of polarized
electrolytic capacitors out there for every
available non-polarized (NP)electrolytic capacitor,
the following is what to do to make an NP electrolytic
if you only can find the polarized kind: Put two (2)
equal value polarized Cs in series in polarity
opposition. That is, connect the two + ends or the
two minus ends together to get the series pair.BATZ: Connecting (-) to (-) Safer/(More-Betterest-?)!
The resulting non-polarized C is equal to one of the
pair and the combination is non-polarized.BATZ: This (new) series C+C capacitor is NOT=C...it's C/2 = half of what you strated out with, trust Bat/also this only holds true if both caps are equal "C"~!
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