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.1 uf and .01uf disk capacitors

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xhunter911

xhunter911

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Hello I am new to electronics and I have a question about the difference bettween the two capacitor values...

I am trying to determine which capacitor to use to complete my amplifier that I am building, but I am unsure of what disk capacitor to use. I have seen many builders use .1uf 25V and I've seen others use .01uf 50v and higher... Does it matter what voltage is used as long as its over 25V, and as long as iit has the correct capacitance???
Also what is the difference bettween .01uf and .1uf??? I cant seem to figure this one out...

All answers are welcomed.....

Thanks in advance
 

Oh boy,

0.01uF means 10nF
0.1uF means 100nF

It's an order of magnitude difference. So, are you Blind ?:D
The voltage of the capacitors must be about 2x greatest than the maximum voltage which will dropout on the capacitor at the highest temperature of the capacitor.
 

    xhunter911

    xhunter911

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before you are trying to work or design with components like capacitors
you Must have minimal knowledge about it
i mean you must know the polarity of a elctrolitic capacitor and etc....
so if not, you can blow the capacitor.........

and you must know when to use it and why..

regards.
 

    xhunter911

    xhunter911

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Usually DIsk capacitors are used to reduce noise, so it is not very important 0.1uF or 0.01uF.
The voltage refers to the maximum value of voltage the capacitor can develop or accept before it exploit or destroy.
If your application develops 7.5 volts for example you must use the next above voltage, for example 10V or 15V, ther are no problems on it.
 

Miguel Gaspar said:
Usually DIsk capacitors are used to reduce noise, so it is not very important 0.1uF or 0.01uF.
Click to expand...

DEEEPLY disagree.

Try to understand those images:
29_1161410865.JPG
 

OK, that images are for better capacitors
one of the problems of disk capacitors are the variations of capacitance. That is the negative and positivevariations of capacitance are not equal.
The other is that the corner frecuency is not what you show in that images ther are rounded.
 

Miguel Gaspar said:
OK, that images are for better capacitors
one of the problems of disk capacitors are the variations of capacitance. That is the negative and positivevariations of capacitance are not equal.
The other is that the corner frecuency is not what you show in that images ther are rounded.
Click to expand...

Probably you are old enough for knowing the old days of TTL noise suppressing using exactly those disk capacitors. The theory is quite the same even the technology has changed. If you want a clean area suppressing, then you need two or three (even 5) filtering capacitors with different values in parallel. The one with lowes capacitance at the shortest distance from the noise generator.
 

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