Homebrew PCBs

Etching works great for me as well. I have etched many boards by 
printing with a bubble jet onto overhead projector transparencies and 
using them as a mask to expose the pre-sensitized boards to UV light. 
It is somewhat time consuming, but doesn't require as much accuracy 
as milling the traces. One drawback is that it seems like if you get 
a tiny drop of copper sulphate anywhere and it somehow rehydrates, 
you have the stuff all over the place. 

I converted to CNC milling the boards because it was a cool project 
to build and it is fun to watch. The acid isn't all that fun to watch.

Dave 

--- In Homebrew_PCBs@y..., hans@c... wrote:
> Been following all this about perf. boards and milling etc.
> 
> I like the idea of milling but it seems the prep. work is 
tremendous.
> 
> Doing pref. boards then PCB seems like hard labor.
> 
> I'd like to have comments as to why pre-sensitzed PCB and etching 
is not
> mentioned and what you consider is so bad with it ?
> 
> Best Regards
> Hans W