ComputerVoltageSources

I uploaded the top and bottom layer images:
ComputerVoltageSource layers 4-18-07 (unverified).pdf

This is a continued modification of my original PCB that includes the
I2C modifications and other minor tweaks. It has not been built
(hence the 'unverified' nomenclature). Print it out and look at it
full size. Those are the pads and clearance without solder mask.
Then imagine 50 wires on it while you are trying to debug solder
shorts. It is just slightly undersized but gives you the idea.

Now, imagine someone else laying it out slightly larger board, adding
additional clearance, changing the SMT to DIP, and fabricating it with
solder mask. Now you have a board that is buildable.

A 5x7 www.pcb-pool.com 10 pack with solder mask would be $40 each.
A 5x7 pcbexpress.com 2 pack with solder mask would be $120 each.

Dave

On 4/28/07, djbrow54 <davebr@...> wrote:

> A 5x7 www.pcb-pool.com 10 pack with solder mask would be $40 each.
> A 5x7 pcbexpress.com 2 pack with solder mask would be $120 each.

With pcbexpress.com you can panelize your boards. The largest panel is
12x14.
If you can place four 5x7 boards on a panel you could buy two panels for
$296
which would be $37 per board (8 boards). four panels would yield a cost
of $19.5 per board (16 boards).

You would have to cut the boards yourself and the 7" dimension is tight
on the 14" panel.

(* jcl *)

--
http://www.luciani.org


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