--- In
Homebrew_PCBs@yahoogroups.com, Leon Heller <leon355@...> wrote:
>
> On 08/05/2011 00:01, James English wrote:
> > Hello, I'm new to this group, though not new to electronics. Does anyone out there have experience with exposing a photosensitive board through a negative to sunlight? A man at Injectorall told me that about six minutes at noon on a bright sunny day but that doesn't seem to work.
>
> It depends where you are, to some extent. I think it takes a lot longer
> than that.
>
> Make yourself a UV exposure unit like this one of mine:
>
> http://www.leonheller.com/Photos/UV%20unit.jpg
>
> It'll work a lot better.
>
> Leon
> --
> Leon Heller
> G1HSM
>
I have got a face tanner,,guess its the name..hmm
Philips make them with 4 small tubes.. get them in a flee market..I payed same amount as 3 pound for such a tanner. and it takes around 3 minutes to exposure in a distance of 13 cm..and there are a timer build in too.. have not used it as I'm not sure its acurate enough.
alex