Homebrew PCBs

Or you can try

http://www.scienceprog.com/pcb-exposure-using-uv-light-led-box/

This does work, just need to make a pcb first

Richard

--- In Homebrew_PCBs@yahoogroups.com, "twb8899" <twb8899@...> wrote:
>
> --- In Homebrew_PCBs@yahoogroups.com, Lez <lez.briddon@> wrote:
> >
> > Ok I have had enough tonight of TT
> > 
> > 
> > I need to get 10 little 2 inch * 2 1/2 inch boards done. (only 
holds a
> > pic and some transistors)
> > 
> > I can buy the developer for £1.20, I can get a 8*4 board for 
£1.20, so
> > for £3.60 I can get everything, except a source of UV..........
> > 
> > I have heard that outside in sunlight can work, any truth in this?
> > anyone else do this?
> > 
> > I have never done UV before, so have no idea on where to go with
> > exposure times etc.
> > 
> > I happen to have a 9w UV light on the garden pond to kill algae, 
can
> > that be used (badly!)
> > 
> > 
> > 
> > 
> > -- 
> > 
> > Lez
> >
> 
> 
> 
> Mercury vapor bulbs will work the best and give the fastest 
exposure.
> Another way is to get a cheap 500 watt quartz halogen work lamp and
> use it for UV exposure. They cost about $8 to $10 USD. May work even
> faster if you remove any glass filter lens as this may block some of
> the UV. I tried it once and it took 2 minutes at a distance of one
> foot. The etching resist was negative acting dry film. Positive 
resist
> will take much longer.
>