Homebrew PCBs

I believe I posted the links about the German project? ...Anyway...

Another idea was here: http://4hv.org/e107_plugins/forum/forum_viewtopic.php?66471

The first guy seems to have had an idea of using a grid of LEDs, but I don't think you can get them small enough.

However, in the 2nd half of that thread, there was another guy with a UV laser diode on a plotter table, the photos show that it looks like the board came out pretty well.

This is something I thought of trying out, but it looks expensive. Also double-sided would be a pain.

Laser-printed transparencies and toner-transfer still works well for me so far...


--- In Homebrew_PCBs@yahoogroups.com, "wayne.causey" <wayne.causey@...> wrote:
>
> Robin, thanks for providing the links for an outstanding Laser Direct Imaging project. Does anyone know of any similar projects?
> 
> Wayne
> 
> --- In Homebrew_PCBs@yahoogroups.com, Robin Whittle <rw@> wrote:
> >
> > In "Re: pcb-specific laminator/exposure/etc printer...", on 2012-07-01,
> > tda7000 wrote:
> > 
> > > Much easier to do this, I would think:
> > > 
> > > http://www.youtube.com/watch?v=fi4P-Bwc6g8
> > > 
> > > http://www.das-labor.org/wiki/LaserExposer
> > 
> > This looks difficult to do, by most standards, since there is customised
> > hardware and two microcontrollers.  There would be significant problems
> > calibrating it, correcting for the out-of-focus laser beam and the
> > non-linear sweep across the board.
> > 
> > Also, I think it would be difficult to align exposures for double-sided
> > compared to the alternative of aligning two phototools (or perhaps
> > transfer paper with toner) facing each other, and then slipping the PCB
> > material in between them.
> > 
> > I think it is a really great project, but I don't feel inclined to do
> > all this work myself.
> > 
> >   - Robin
> >
>