Homebrew PCBs

palciatore@... wrote:
>  
>
> A recent thread that was a thinly disguised ad has brought back to my 
> mind the basic reason why I joined this group and several others. I 
> have been mostly lurking on all of these boards trying to pick up the 
> answers that I need.
>
[...]

UV exposure is the closest method to what you used.  The only difference 
is the way in which you generate the artwork.  For me, a single tracing 
paper print works just fine (clear coating it actually does seem to 
help, I had an excellent exposure a few days ago, no touch up needed at 
all, not even to the artwork, no shorts at all, no breaks at all, board 
size about 5x4cm) with dry film, UV Leds, 55sec exposure, sodium 
carbonate 30g/L cold to develop.

I do down to about 12/12, could do less if really desperate, but not 
worth the bother. 

As for advertisements, they are not necessary here, we have Google and 
there are established cheap pcb prototype houses (iTead, Seeed Studio, 
OSHPark, Smart-Prototyping, PCB Zone.. that's just off the top of my 
head) when you want to move to a small "run" of production quality 
boards.  For which you should have no trouble exporting the gerbers from 
any half decent PCB design software, of which there is an abundance of 
free and paid ones.