Homebrew PCBs

On 26/01/2010 00:35, David Griffith wrote:
>
> I'm convinced now that I should give the photographic method a try and
> even try pre-sensitized boards.  I'd like to do things the Right Way
> instead of going sloppo like I have been so far.  That might explain my
> previous problems.  Anyhow, I'll start with constructing a UV exposure
> box.  The box and timer stuff seems straightforward enough, but what I'd
> really like is to make a gizmo that sandwiches the PCB and films between
> two sheets of glass or lexan.  The idea is to put the things in this
> frame, adjust for registration, clamp it closed, and that's it.  Insert
> into the UV box for exposure.  I saw a page a couple years ago discussing
> something like this, but I can't find it anymore.  Does anyone here smell
> what I'm cooking?
>
> I keep the boards small and one-sided, would a UV EPROM eraser work?
>

Here is my UV exposure unit:

http://www.leonheller.com/www/Photos/UV%20unit.jpg

It's made from MDF and some strips of wood, screwed tofether and glued. 
I had a sheet of glass cut to size. A heavy book on top of the PCB keeps 
it in contact with the transperency.

Leon
-- 
G1HSM
http://webspace.webring.com/people/jl/leon_heller/