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Bill Of Materials
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Bill Of Materials

by Student on Tue Mar 22, 2005 8:36 pm

I was wondering about the bill of materials (BOM). I know on the site it says that the posted BOM might be outdated, and that we should check with Eagle. Does this mean export a new BOM from Eagle and use that one for ordering the parts?

Thanks,

Student
Student
 

Re: Bill Of Materials

by adafruit on Tue Mar 22, 2005 10:03 pm

Student wrote:I was wondering about the bill of materials (BOM). I know on the site it says that the posted BOM might be outdated, and that we should check with Eagle. Does this mean export a new BOM from Eagle and use that one for ordering the parts?


Essentially. For example, I think the BOM still has the 20MHz crystal.

adafruit
 
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by Danilo on Wed Mar 23, 2005 7:47 am

I exported a partlist from Eagle and still has the 20MHz crystal and a PIC16F877PT instead of PIC18LF452. Is it right?

Here is the list:
Partlist


Sorry I don't speak English well :oops:
Danilo
 

by adafruit on Wed Mar 23, 2005 2:45 pm

yes i think those are the two inconsistancies.
the chip is definatly a 18LF452 and the crystal should be a 29Mhz

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by xoxota on Wed Mar 23, 2005 6:00 pm

I actually put the 16F on the board, then realized it was the incorrect processor when I attempted to program the bootloader. Had to scrap the board and the chip (since I had not yet learned how to remove multi-pin SMT components *noob*). In the interest of preventing similar heartache on others, I have a short list of some of the difference between the EAGLE bom, and the BOM from the website. Usually, when in doubt, I went with the EAGLE bom, but then again, my Minty doesn't work, so...

Code: Select all | TOGGLE FULL SIZE
Part    Eagle says           BOM says
C11     16pF                 20pf
C12     16pF                 20pf
C14     150uF, polarized     33uF
C15     150uF, polarized     33uF
C23     22pF                 20pf
C24     4700pF               4.7 nF (same thing)
C25     1000pF               1 nF (same thing)
C26     .01uF                Does not exist in BOM
C27     10uF, polarized      Does not exist in BOM. Eagle specifies this as a polarized Cap. I used non-polarized. Not sure if this is why mine's not working :-)
C29     2200pF               Does not exist in BOM
C36     150uF, polarized     Does not exist in BOM
C40     150uF, polarized     Does not exist in BOM
C6      16pF                 20pF
C7      16pF                 20pF
D3      1N5317               same as D2
IC1     PIC16F877PT          Should be PIC18LF452
IC2     FT232                Should be FT232BM (same thing?)
IC3     CS4340A              CS4334
L4      BEAD                 Not sure what a "bead" is. I just ordered the part # from the BOM.
R18     100K                 The Part # from the BOM gives a package with a large profile (blocks the CF socket).
R6      3                    10ohm
R7      3                    10ohm
U0      CF Ejector - Left    LEFT, but it won't fit in the case. Use RIGHT instead. (Digikey: WM18507-ND)
X1      10MHz                BOM switches this with X2.
X2      20MHz                BOM Switches this with X1. Get a 29.491 instead.


If anyone is interested, I have a complete BOM in MS Excel, with all DigiKey part numbers. No web site where I can make it available, though...
xoxota
 
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by Danilo on Wed Mar 23, 2005 6:31 pm

I'm interested. Can you send me by e-mail?
danilo_email-eletronica@yahoo.com.br

xoxota are you Brazilian?
Danilo
 

by immortality on Wed Mar 23, 2005 11:55 pm

same..here can u send it to me also...rajule@gmail.com ^_^
immortality
 
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by adafruit on Thu Mar 24, 2005 2:06 am

Thanks for the fixes, I've uploaded a new version of the schematic & BOM with more notes and corrections.

R18 is right, i actually put it on upside down!
all of the 16/20/22pF capacitors can be placed with 20pF and work just fine.

also, i now remember that i had problems with some crystals. use the one in the new BOM. it should work. best of luck!

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Thanks

by Student on Thu Mar 24, 2005 2:50 am

Thanks for the update. I've just got the boards in, and I'm now about to order all of the parts I have not yet sampled. Excited to get this thing put together.
Student
 

by Danilo on Mon Mar 28, 2005 7:18 pm

One more question, the DAC is CS4334 or CS4340?

Thank you everybody!
Danilo
 

by minty maker on Wed Mar 30, 2005 1:45 am

Danilo wrote:One more question, the DAC is CS4334 or CS4340?

Thank you everybody!


Yes, I have the same question. The Cirrus Logic site says the update to the CS4340 is the CS4344 not the CS4334. Which one do we want ?
minty maker
 

by adafruit on Wed Mar 30, 2005 2:16 am

the cs4344 isnt available, so use the cs4340-KS which newark carries.

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by Guest on Wed Mar 30, 2005 2:25 am

ladyada wrote:the cs4344 isnt available, so use the cs4340-KS which newark carries.

I believe Newark has the cs4344 in stock and not the cs4340, but either will work right?
Guest
 

by adafruit on Wed Mar 30, 2005 2:37 am

hmm, seems like they're out of stock on the 4340. the 4344 doesnt come in SOIC16 package.
not sure what to tell you, you can order from newark and they'll ship it to you in a month, or you can try looking elsewhere. when i designed minty (like, a year and a half ago) the cs4340 was the best choice...

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by minty maker on Wed Mar 30, 2005 2:42 am

So do any of you know where I can get a CS4340 from?
minty maker
 

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