Bill Of Materials

by **Student** » Tue Mar 22, 2005 7:36 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 I know on the site it says that the posted BOM might be outdated, and that we should check with Eagle.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

by **adafruit** » Tue Mar 22, 2005 9:03 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 I know on the site it says that the posted BOM might be outdated, and that we should check with Eagle.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.

by **Danilo** » Wed Mar 23, 2005 6:47 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:

by **adafruit** » Wed Mar 23, 2005 1:45 pm

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

by **xoxota** » Wed Mar 23, 2005 5:00 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: 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...

by **Danilo** » Wed Mar 23, 2005 5:31 pm

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

xoxota are you Brazilian?

by **immortality** » Wed Mar 23, 2005 10:55 pm

same..here can u send it to me also...rajule@gmail.com ^_^

by **adafruit** » Thu Mar 24, 2005 1:06 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!

by **Student** » Thu Mar 24, 2005 1:50 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.

by **Danilo** » Mon Mar 28, 2005 6:18 pm

One more question, the DAC is CS4334 or CS4340?

Thank you everybody!

by **minty maker** » Wed Mar 30, 2005 12:45 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 ?

by **adafruit** » Wed Mar 30, 2005 1:16 am

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

by **Guest** » Wed Mar 30, 2005 1:25 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?

by **adafruit** » Wed Mar 30, 2005 1:37 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...

by **minty maker** » Wed Mar 30, 2005 1:42 am

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

Bill Of Materials

Bill Of Materials

Re: Bill Of Materials

Thanks

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