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PostPosted: Tue Mar 24, 2009 1:31 pm 
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I don't know why so many people seem to have trouble with this conversion so I'm going to try to explain it.

To convert nano farads to micro farads you move the decimal point 3 places to the left.

Example 1:

100nf is the same thing as 100.0 (one hundred point zero) nano farads. To convert this to micro farads you simply move the decimal point 3 places to the left. So 100.0 nano farads becomes .100uf (point one zero zero micro farads) or .1uf (point one micro farads).

Example 2:

10nf is the same thing as 10.0 (ten point zero) nano farads. To convert this to micro farads you move the decimal point 3 places to the left. So 10.0 nano farads becomes .010 (point zero one zero) micro farads.

Example 3:

1nf is the same thing as 1.0 (one point zero) nano farads. To convert this to micro farads you move the decimal point 3 places to the left. So 1.0 nano farads becomes .001 (point zero zero one) micro farads.

Example 4:

Lets say you have a cap marked 2n2. This is the same thing as 2.2 (two point two) nano farads. To convert this to micro farads you again move the decimal point 3 places to the left. So 2.2nf becomes .0022 (point zero zero two two) micro farads.


To convert nano farads to pico farads you move the decimal point 3 places to the right.

Example 1:

100nf is the same thing as 100.0 (one hundred point zero) nano farads. To convert this to pico farads you simply move the decimal point 3 places to the right. So 100.0 nano farads becomes 100,000.0 pf (one hundred thousand point zero) pico farads.

Example 2:

10nf is the same thing as 10.0 (ten point zero) nano farads. To convert this to pico farads you move the decimal point 3 places to the right. So 10.0 nano farads becomes 10,000.0 (ten thousand point zero) pico farads.

Example 3:

1nf is the same thing as 1.0 (one point zero) nano farads. To convert this to pico farads you move the decimal point 3 places to the right. So 1.0 nano farads becomes 1,000.0 (one thousand point zero) pico farads.

Example 4:

Lets say you have a cap marked 2n2. This is the same thing as 2.2 (two point two) nano farads. To convert this to pico farads you again move the decimal point 3 places to the right. So 2.2nf becomes 2,200.0 (two thousand two hundred point zero) pico farads.

It doesn't get any easier than that folks. :wink:

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PostPosted: Tue Mar 24, 2009 1:37 pm 
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I can't help but feel this might be directed at my 470n =.47uf thread below. That thread was more a "just checking to see if i've lost my mind" type thing. Regardless this sticky will be quite handy. ~MJH

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PostPosted: Tue Mar 24, 2009 1:43 pm 
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It isn't aimed at any one thread. This topic comes up time and time again. I've lost count of the number if times I've tried to explain it so I thought making it into a sticky thread would help.

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PostPosted: Thu Mar 26, 2009 8:46 am 
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Thank you.

I could've done with this before I started building actually...

I sourced some components, went to the store, bought them, took them home to begin my build and when I check the writing on the side of the caps, it doesn't match what I thought I needed... a week later, frustrated, I go back to the shop and I'm like...

"Oi! You eeeeeeeeeeeedydots!!!!! Just who the hell do you think you are huh? Bet you thought you saw me coming eh?! Thought I was a soft-touch?! This is an outrage!!!! I gave you a list! A LIST goshdarnit! It was colour-coded and in bold type!!! How could you screw it up?! You're supposed to be professionals!!!! I am NEVER going to use this store again! Actually, I am... I'm going to use it right now!!! As a dirty protest and to mark my utter disdain with the way I have been ABUSED by your staff, I'm going to coil myself a bum egg right here!!!!" So I dropped trow, squatted and began to squeeze out my anger. If I wasn't already flushed red from straining my bowels, I'd have turned a vivid beetroot when the guy simply responded with, "It means exactly the same thing".

I still haven't been back. :oops:

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PostPosted: Thu Apr 02, 2009 11:16 pm 
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Jesus. Pity the bloke working at the above mentioned shop, but Stephen, I can delete that conversion chart from my favourites list now. A light just went on above my head. Thankyou. :)

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PostPosted: Mon Apr 06, 2009 8:43 pm 
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Google's built in Calculator feature can do these unit conversions - as well as general artithmetic, trig functions, converting Hexadecimal to Roman Numerals or whatever - all sorts of stuff.

http://www.google.com/search?hl=en&safe ... tnG=Search


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PostPosted: Fri May 08, 2009 12:55 pm 
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Or if you have doubts about your conversion, type it in here:
http://www.translatorscafe.com/cafe/uni ... 81%3BF%5D/

Another useful site for determining cap codes: http://www.electronics2000.co.uk/calc/c ... ulator.php
(It also displays the results in pico-, nano- and microfarads.)

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PostPosted: Sun May 10, 2009 6:59 am 
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yeah I had alot of problems remembering and figuring out pfs nfs ufs etc when I started, I mean I always knew what they stood for but I think
alot of the confusion stems from schematics that would use .01 uf and then in the same diagram use 10 nf and I think when
theres such schematics lying about you can be forgiven for having the odd brain fart, anyway its good that you laid this out in
plain english I think itll help those begining in the field because it is confusing especially when youre trying to remember transistor
codes, op amp codes, resistor colours etc in such a non standardised subject

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PostPosted: Tue May 12, 2009 7:40 am 
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I think it would help if this lesson took a step back and helped people understand orders of magnitude. Looking at the common ones used today...

trillion..........."tera-" (T)...........10^12
billion............"giga-" (G)...........10^9
million..........."mega-" (M).........10^6
thousand........."kilo-" (k)...........10^3
one..............."-" (unit).............10^0
thousandth......"milli-" (m)..........10^-3
millionth........."micro-" (µ or u)...10^-6
billionth.........."nano-" (n)..........10^-9
trillionth........."pico-" (p)...........10^-12

See the pattern? If you can understand kilobytes, megabytes and gigabytes, then you can understand microfarads, nanofarads and picofarads. As long as you remember that you're just moving the decimal three spots every time and don't confuse the order of the prefixes, it's quite simple. :)

http://en.wikipedia.org/wiki/Order_of_magnitude


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PostPosted: Tue May 12, 2009 7:49 am 
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yeah oddly enough when I got it into my head it was a standard base 10 counting system
i neverhad problems after that,
as for the resistor colour code I had to learn a really rude Mnemonic Device
(you know where you use the first letter of a made up sentence to remember a sequence of letters for example "Every Good Boy Desereves An Enema" to remember guitar string order etc
but I aint telling you my resistor one cause its way too rude and im ashamed its the only way I can remember it

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PostPosted: Thu May 28, 2009 11:21 am 
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Ugh, I can feel you on this discussion. Even almost graduated EE majors still have an issue with this. It drives me insane in the classroom.

At a very early age, my father instilled in me a little rhyme that has solidified this in my head.

Milli... micro... nano... pico...

Pronounce the 'i' in 'pico' like a long 'i', not the long 'e' version you normally pronounce the prefix as. If you do this, micro rhymes with pico.

Just say this a thousand times in your head and try to remember to do this for a week. I guarantee you will not forget it after that.


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PostPosted: Wed Jun 03, 2009 12:00 pm 
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what would 0.0047pf convert to?

im going by this layout, and c13 says its 0.0047pf, would pf be a typo? should it be uf?

http://www.aronnelson.com/gallery/main. ... ewsIndex=1

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PostPosted: Wed Jun 03, 2009 3:36 pm 
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confusedinNC wrote:
what would 0.0047pf convert to?

im going by this layout, and c13 says its 0.0047pf, would pf be a typo? should it be uf?

http://www.aronnelson.com/gallery/main. ... ewsIndex=1

First off, that would be 4.7 fF or femto farads. However, I have never seen a physical capacitor lower than 0.1 pF. I would venture to guess that was a typo and meant to say uF or micro farads. 0.0047 uF is a fairly common value as well.


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PostPosted: Thu Jun 04, 2009 5:53 am 
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definetly a typo I've made that one a few times for various people its definetly 0.0047uf

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PostPosted: Thu Jun 04, 2009 6:13 am 
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insonicbloom wrote:
I've made that one a few times


good to know! I just may have a few questions when it comes time to build :lol: hopefully not though!

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PostPosted: Thu Jun 04, 2009 7:15 am 
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confusedinNC wrote:
insonicbloom wrote:
I've made that one a few times


good to know! I just may have a few questions when it comes time to build :lol: hopefully not though!


no worries, you know where I am!

its a good one with loads of reverb and an ebow

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PostPosted: Thu Jun 04, 2009 7:50 am 
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insonicbloom wrote:
confusedinNC wrote:
insonicbloom wrote:
I've made that one a few times


good to know! I just may have a few questions when it comes time to build :lol: hopefully not though!


no worries, you know where I am!

its a good one with loads of reverb and an ebow


oh ill bet. im actually building it for my bassist. he plays bass in 1 band and guitar in another band with me so its gonna get lots of use! im HOPEFULLY going to put it in a Hammond enclosure with the sloped front and wood panel sides... if i can ever figure out how to order one from them :x !!!

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PostPosted: Thu Jun 04, 2009 11:27 am 
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I did a similiar thing with one of them but instead of buying a box like that I just ended up making one, alot easier with having the wooden sides
cause you just need to make the shape out of a long strip of metal then a piece of metal for the bottom and cutting up wood is easy enough
just remember with any wooden enclosures to tinfoil the insides.
I actually have a veroboard version of the big muff with capacitor options for bass if you want it, doesnt have the "clip" pot but I think thats not something I personally ever bother using in a four stage distorter!
it is verified by me a few times so it definetly works just take your time with it because its got a lot of bits!

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PostPosted: Fri Nov 13, 2009 6:40 pm 
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http://www.justradios.com/uFnFpF.html


Math is good, Charts are better.


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PostPosted: Tue Apr 19, 2011 3:19 pm 
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ddavis510 wrote:
http://www.justradios.com/uFnFpF.html
Math is good, Charts are better.


Yep...

Code:

US                 JAPAN     Euro
----- - - - - - - ------- - ------

.1                  104k     100n
.12                 124k     120n
.15                 154k     150n
.22                 224k     22n
.33                 334k     330n
.47                 474k     470n
.56                 564k     560n
.68                 684k     680n
.82                 824k     820n

.01     10,000pF    103k     10n
.012    12,000pF    123k     12n
.015    15,000pF    153k     15n
.022    22,000pF    223k     22n
.033    22,000pF    333k     33n
.047    47,000pF    473k     47n
.056    56,000pF    563k     56n
.068    68,000pF    683k     68n
.082    82,000pF    823k     82n

.001     1000pF     102k     1n0
.0015    1500pF     152k     1n5
.0022    2200pF     222k     2n2
.0033    3300pF     332k     3n3
.0047    4700pF     472k     4n7
.0056    5600pF     562k     5n6
.0068    6800pF     682k     6n8
.0082    8200pF     822k     8n2

100pF                101
150pF                151
220pF                221
470pF                471





Capacitor Values
------------------------------------------------
nano farads

u = micro is 10E-6  ( ten to the -6th power)
n = nano  is 10E-9  ( ten to the -9th power)
p = pico  is 10E-12 ( ten to the -12th power)


.022uF   = 22n   = 22000pF
.0022uF  = 2.2n  = 2200pF
.0022uF  = 2n2   = 2200pF (Euro)


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