[dorkbotpdx-blabber] Eagle parts list

[Tim McIntyre]

Hey all,

In case you can't tell from the nature of my question I'm brand spanking new to hobby electronics.  I've got a parts list exported from Eagle that I'm having trouble interpreting.  I'm told that the parts are very common and easy to find so I'm feeling pretty stupid.  For example:

Part     Value       Device                          Package               Library         Sheet

C1       100n        C-EU050-025X075      C050-025X075     rcl                1

My best understanding...

I believe "Part" is a reference to that component on the given schematic?

"Value" in some cases appears to be the resistance in ohms like 10k but the other values elude me... (i.e.. what is n in 100n)

I thought that I could just punch in the "Device" number into Digi-Key or Mouser or Google and find/buy it but that appears to not always be the case... on two instances it was but not others.

No ideas on "Package"?

"Library" is the corresponding Eagle library that contains the information on this part?

"Sheet" is the given page in the schematic?

Most importantly what I want is to be able to find/buy any part listed in one of these parts lists.  Any guidance is greatly appreciated!

Thanks in advance!
Tim

[Laen]

On Dec 4, 3:57 pm, Tim McIntyre <t...@easystreet.net> wrote:
> Hey all,
>
> In case you can't tell from the nature of my question I'm brand spanking new
> to hobby electronics.  I've got a parts list exported from Eagle that I'm
> having trouble interpreting.  I'm told that the parts are very common and
> easy to find so I'm feeling pretty stupid.  For example:
>
> Part     Value       Device                          Package
> Library         Sheet
>
> C1       100n        C-EU050-025X075      C050-025X075
> rcl                1
>
> My best understanding...
>
> I believe "Part" is a reference to that component on the given schematic?
>
> "Value" in some cases appears to be the resistance in ohms like 10k but the
> other values elude me... (i.e.. what is n in 100n)
>
> I thought that I could just punch in the "Device" number into Digi-Key or
> Mouser or Google and find/buy it but that appears to not always be the
> case... on two instances it was but not others.

Yeah, that's just the name of the device as listed in the eagle
library. It might
mean something, or it might not. Often this matches the manufacturer
part number.

> No ideas on "Package"?

This is the important bit, I think. The "package" describes the
shape of the device, and the form factor. For example, a package of
"0805" is a device that's .008 inches by .005 inches.

You want to buy a device that has this "package" and the right
"value". This particular device you list is from the "C-EU" library
of European capacitors and the "025X075" means it's 2.5mm x 7.5mm.
If you look at the "description" of the device, it says the lead
spacing is 5mm, so that's what you're going to look for on mouser or
digikey.

Just type ".1uF Capacitor 5.0mm" (100nF == .1uF) into Mouser and see
what you get.

-Laen
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[Tim McIntyre]

Thanks for the pointers Laen.  Seems like a lot to know to get one little capacitor.  I don't know how I'm ever going to figure all that out for 30 different components... eeesh!

Where did you view the description, I can't seem to find it?

Thanks again,
Tim

[Tim McIntyre]

I found the description.  Thanks again Laen:-)

[Tim McIntyre]

The value of 100n here is shorthand for 100nf which is short for 100 nanofarads correct?

On Fri, Dec 4, 2009 at 9:47 PM, Laen <james...@gmail.com> wrote:

[Donald Delmar Davis]

Yes!

Capacitor conversion table for picoFarads, nanoFarads, and microFarads

microfarads (mF)	Nanofarads (nF)	Picofarads (pF)
0.000001	0.001	1
0.00001	0.01	10
0.0001	0.1	100
0.001	1	1000
0.01	10	10000
0.1	100	100000
1	1000	1000000
10	10000	10000000
100	100000	100000000

[Tim McIntyre]

Thanks Donald!

[Russell Senior]

>>>>> "Tim" == Tim McIntyre <tm...@easystreet.net> writes:

Tim> Thanks Donald!

Actually, slight correction here: microfarads will be written uF (u
being an ASCII kludge for the lower-case greek mu, μ), mF would indicate
millifarads.

--
Russell Senior, President
rus...@personaltelco.net

[Tim McIntyre]

I guess I'm not the only late night dork;-)

Thanks Russell!

2009/12/6 Russell Senior <rus...@personaltelco.net>

[Dan Strother]

While mF should indicate millifarads, this is rarely the case in
practice. You can find many older capacitors labeled with MF (or some
variant.. http://www.justradios.com/uFnFpF.html ) to indicate
microfarads.

To my knowledge, millifarads still isn't used. Manufactures prefer to
use microfarads or just plain farads (in the case of super-caps).

- Dan S.

2009/12/6 Russell Senior <rus...@personaltelco.net>:

[Russell Senior]

>>>>> "Dan" == Dan Strother <dan.st...@gmail.com> writes:

Dan> While mF should indicate millifarads, this is rarely the case in
Dan> practice. You can find many older capacitors labeled with MF (or
Dan> some variant.. http://www.justradios.com/uFnFpF.html ) to
Dan> indicate microfarads.

Dan> To my knowledge, millifarads still isn't used. Manufactures
Dan> prefer to use microfarads or just plain farads (in the case of
Dan> super-caps).

In theory, practice and theory are the same. In practice, however,
they aren't.

[Doug Ausmus]

And let's not forget that other older reference: mmF which is the same as pF (micro-micro-farad).

**Rarely** you might see MFD or MMFD (MicroFaraD or MicroMicroFaraD, although I can't say I've seen that for LONG time.

And while we are talking about ancient references, who can remember CPS instead of Hz? (Cycles Per Second)  <g>
-Doug

[Tim McIntyre]

farads and cycles and hertz on my!

Thanks for all the input guys!

[dan p]

how about this one?
R2 100_NM R-EU_ R0805RND RESISTOR, European
symbol

a resistor with NM as units? I'm trying to put together the parts for
a Duemilanove, and working on the decoding of the eagle parts list.

Thanks.

[Tim McIntyre]

Hey Dan,

I had a live chat (chat room support thingy on their site) with one of the late night tech guys over at DigiKey, Matt I think.  He was extremely helpful and put virtually all the parts together for me.  I think he even installed Eagle on his personal laptop so that he could look at the various libraries.

Good luck!
Tim

[dan p]

wow, nice customer service. Hard to believe in this day and age.