Re: gEDA-user: smd challenge board status - last step!

[DJ Delorie <dj@xxxxxxxxxxx>]

> I'll give some feed back to that. I was planing on ordering ten.
> Not that I'm that bad at soldering, but some people at work could use
> some practice.

Note that ten packs aren't cut up; you'll need a scroll saw or other
pcb cutter with a narrow kerf.  I use a #2 blade.  I'm going to cut up
the singles first, and if I have any blades left (they dull quickly on
fr4) I'll start working on the ten packs.  Also, the parts are in
strips of ten still.

I'm trying to make sure everyone who wants one gets one, without (1)
having too many left over, or (2) not having enough for everyone.  I
don't mind sending ten-packs to people who will give them to ten
people (that's what they're *for*), but keep in mind I only have ten
ten-packs ;-)

Also, the schematic has all the part numbers to order, and there's the
pcb file, you could *make* a bunch of kits for work.  It costs about
$200 to make 100 kits (if you panelize with other projects), which is
petty cash for a medium sized business.  You could add a bunch to each
board you make by just adding 0.5" to the short edge, minimum purchase
for the parts is at most 20 but you don't get as much of a discount.

> Also on the $0.37 surcharge for PayPal, is that per board, or per
> order?

It's 2.9% + 0.30 so it depends on the total amount.  A ten pack would
be $20.90.  I'd have to have a different button for each quantity.

> You could always buy one of those small ads in the back of Circuit
> Cellar magazine, and sell thousands, or not....

This is a not-for-profit project.  I'd have to charge a lot more for a
commercial version (it's labor intensive), and there *are* companies
that do this on the large scale (www.practicalcomponents.com) but not
for singletons.

> I tried copy&pasting from the PDF but that didn't go well.

It's a ps2pdf from a .ps "print" from oowrite.  I wonder if it's using
UTF-8 ?  I'll have to play with it.

Replace "pdf" with "sxw" to get the oowrite master copy, but you'll
need all the graphic files too, they're not embedded (easier to edit
that way).

> I don't recommend relying on "black spot on the inside of the LED".

That's what it says on their datasheet.  And all the LEDs came off one
strip, so they all match, and I know the spot is in the right place at
the moment ;-)

The metal is different on the bottom, but that's not called out on the
spec.

> I would add a "*" to the C2-C5 in the BOM and the note box about
> "populate only C2 or .."  I'd also add a note marker to R3-R4
> linking to the "you'll have two left over when you are done".
> Otherwise it just looks like the BOM is wrong in both cases, because
> the designators do not match the quantities.

Done.

> Won't two AA's power this rather than messing with a 9V and 7805?

Hmmm... should, now that I check.  I think the original plan was to
use a TI xor gate, but it's out of production.  *That* might have been
5V only.

Note that you may need the 150's instead of 1k's for 3v operation.

I'll have to try it and see :-)


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