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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Capacitor question
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microscope



Joined: Jan 09, 2006
Posts: 10
Location: Brooklyn, NY

PostPosted: Tue Mar 28, 2006 12:18 pm    Post subject: Capacitor question
Subject description: 2u2 NP
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Here’s my latest stupid question. I assume C10 on Andrew Sharp’s components list is supposed to be “2uf NP” instead of “2u2 NP.” If “2u2 NP” is correct I don’t know what that is. I have 1uf NPs. Is it possible to use those instead? I found on Google that I can use 2 1uf NPs “in series but with like polarities connected together.” What would this look like on the stripboard layout?

I should be finished with it soon (one way or another) so my stupid questions will end.

Thanks,
Kevin
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jksuperstar



Joined: Aug 20, 2004
Posts: 2485
Location: Denver
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PostPosted: Tue Mar 28, 2006 9:22 pm    Post subject: Reply with quote  Mark this post and the followings unread

2u2 is a compact way of saying "2.2 uF". In the original schematic, C10 is .1uF. Either way, it doesn't matter much, it['s just there to stabilize a reference voltage, created by two resistors (R75 & R73). I saw the strip board layout page, and it says all the designators are the same as the original schematic, but I didn't find the component list you spoke of.

So, you can probably use just the one 1uF you have, or use a .1uF if you've got it. I don't think the value is extremely important.
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fluxmonkey



Joined: Jun 24, 2005
Posts: 696
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PostPosted: Wed Mar 29, 2006 9:43 am    Post subject: Re: Capacitor question
Subject description: 2u2 NP
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microscope wrote:
Here’s my latest stupid question. I assume C10 on Andrew Sharp’s components list is supposed to be “2uf NP” instead of “2u2 NP.” If “2u2 NP” is correct I don’t know what that is. I have 1uf NPs. Is it possible to use those instead? I found on Google that I can use 2 1uf NPs “in series but with like polarities connected together.” What would this look like on the stripboard layout?

I should be finished with it soon (one way or another) so my stupid questions will end.

Thanks,
Kevin


outside the US, its pretty common write parts values by putting the units where the decimal point goes... so 2n2 is a 2.2n cap; 4u7 is a 4.7uf, etc. decimal points can often get lost. Caps can also be "NP", which means "non-polarized"--electrolitic caps are usually polarized, but you can get some that aren't.

b
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