From: sleeper75se (sleeper75se_at_yahoo.se)
Date: 2001-12-13 06:45:07
Hi Doug,
--- In buildcheapeeg_at_yahoogroups.com, Doug Sutherland <wearable_at_earthlink.net> wrote:
> That epanorama site has some good links to sites
> with info on how to make PCB boards ...
>
> http://www.epanorama.net/links/basics.html#pcb
>
> Wow, it sure looks like a PITA and a lot of work.
Hehe, if you got the right stuff (laser-printer, uv-light, good
ventilation, the proper chemicals (Sodium hydroxide, hydrogen
peroxide and hydrochloric acid), drill and a place to make a mess of)
it's not really that hard. ;-)
Seriously though, a prototyping service is the best choice for most
people. Here's a european alternative: http://www.elprint.com
They have more options through their Macaos-software. For instance,
the price drops if you are prepared to wait a few weeks, and I think
they accept larger lots (more than 20 boards at least). You have to
make a layout to get a qoute, so I'll get back to you on that.
>
> I looked at pricing of boards at PCB express. They
> list their prices by board size in square inches
> and quantity. For ModularEEG, both boards are
> 3.9 x 3.15 = 12.285 square inches. This puts it in
> the 10-19 inch pricing category at PCB express.
[snip]
> 20 $333 x 2 boards / 20 = $33
Another suggestion: Joerg has made both boards approximately half the
size of a standard 160x100 mm board (25 square inches category). If
you put them on one PCB, price drops to $16. Not too bad eh? :-)
For $22 we would get the solder-masked and silkscreened version
(option #2).
>
> I hope I have that right, can somebody check? The above
> does not include shipping from PCB express or to the
> individual people. If 20 of us get together it looks
> like we can each get one set of the ModularEEG boards
> (amp plus digital board) for $35-$40.
>
> Is option #1 at PCBexpress good enough for this?
> http://www.pcbexpress.com/PCBexpordr.php
It should be ok, though personally I'd go for #2. (or actually a
different manufacturer)
/Andreas
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