[sdiy] For breadboard lovers...

[Jason Tribbeck]

Hi,

> >I take it that you two are using Photo Resist etching?
> 
> Yes.
> Years ago I built an exposure unit but then I got an old commercial
exposure
> unit
> with vacuum pump that works better as the films will be pressed to the
board
> and
> so the images are even sharper - so the 0.5mm are no big problem.
> 
> My exposure unit looks like this one (but an older version):

Oh - I wasn't expecting to have to write an essay on it :)

I do like the scanner-based one - gave me a smile.

My unit's a cheapish one I bought from Maplin Electronics about 10 years
ago - although I think it's beginning to show its age. It keeps the
board pressed to the film with some foam above it.

The only problems I've had are if the edge of the board isn't flat (for
example, if it's a rough cut), so I always file the edges down. Also,
the very edges of the exposure area can be quite 'dark' (which I can
understand).

Currently, though, I only do single sided boards, but I may go into
double sided in the next few months (I've not decided how I'll go about
it yet).
-- 
Jason Tribbeck