Equivelant capacitance.

[ed9428 (Kris)]

For anyone who knows about electronics.
I'm after some 200nf 200v ceramic capacitors for a project but cannot find any.
Does anyone know if I can just join 2 .1uf 200v ceramic capacitors to get the same effect?
Thanks in advance to any help.

[jenchris (Jennifer)]

Capacitors add in Parallel - so I guess if you have the right values, then you end up with what you want.
Though that's only what I remember from College

[Barrykgerdes]

2 x .1 uf capacitors in parallel will make .2 uf
A .2 uf capacitor would be rare these days the "prefered value is .22 uf

A lot would depend on what you need it for

Barry

[gary]

You can buy 0.22uF 200V through hole ceramic capacitors online here -
http://au.element14.com/kemet/c340c2...x7r/dp/1168242

[ed9428 (Kris)]

Will adding in parallel effect the voltage rating.
Not sure how strict I need to be with the specifics in regard to the .22uf.
I'm just having a play around with a generator design from tesla, maybe that's why an uncommon capacitor is used.
Do you think the .02uf difference will matter if I go for the .22uf over joining the .1uf.

[Baddad (Marty)]

Hi Kris,
That's fine. Voltage is OK. It will still be rated at 200V.
The values of capacitance are anything around 10% tolerance.
Many electronic circuits can tolerate 50% change in the value of a component.

You will find that you don't need to be exact.
Circuits are designed to tolerate wide changes. Components often change with age, temperature, operating voltage and who knows what else affects component value changes.

Hope this helps.

[mill (Martin)]

Capacitors in Series halve the capacitance.
Capacitors in parallel double the capacitance.
Resistors in series double the resistance.
Resistors in parallel halve the resistance.
All this assuming you use all the same value EG: 2x1uf and 2x10 Ohm.
So you get 0.5uf and 2uf.
And 20 Ohm and 5 Ohm.

[Barrykgerdes]

Originally Posted by ed9428

Will adding in parallel effect the voltage rating.
Not sure how strict I need to be with the specifics in regard to the .22uf.
I'm just having a play around with a generator design from tesla, maybe that's why an uncommon capacitor is used.
Do you think the .02uf difference will matter if I go for the .22uf over joining the .1uf.

The prefered series of capacitors/resitors etc was implemented to give a range of values varying 5% 10% 20% to standardise the range of components
20% range 10,12,15,18,22,27,33,39,47,56,68,82 ,100

I think in the 1950's. This would have been long after Tesla had passed on.

I don't know the Tesla generator but I would assume that the voltage rating would need to be something like that.

Barry

[ed9428 (Kris)]

Thanks everyone.

I'm going to get the .22uf ceramics.
Not sure if this generator will work just having a play till I go back to uni.
Thanks again.