In article ,
TonyL wrote:
One way is to make a transparency and use that to mask a board coated
with an emulsion then exposed to UV and develop. Then etch in the
normal way.


That looks the most likely option for me.

UV boxes start at around 70 UKP, though. Surely they are just boxes with
UV bulbs and maybe a timer. Any reason I can't make my own box and buy
a replacement UV bulb or two ?

None. Especially if you can get a couple of cheap fluorescent fittings and
get UV tubes for them.

There's now another option - you print to a special paper
and iron that on to plain PCB. Haven't tried that one yet.


I assume I would have to print out a fresh one for each pcb.....OTOH
they could be done as in multiple boards per sheet and seperated after
the etching is done...hmm...

Yes - you duplicate the layout up to the maximum number the board can take
and then cut them to size afterwards. You'd need to work out the best use
if the paper too as it's quite expensive.

Thanks for the ideas.

--
*Growing old is inevitable, growing up is optional *

Dave Plowman London SW
To e-mail, change noise into sound.