A project within a project wihin a project...
Walmart has a simple timer GoodCook that is pleasant to use, simple
to operate and I use it all the time for everything else. Can't beat
$5. The nicest thing is that it stays always on (14microA), has
larged digits. People will have enough problems building a UV box be
gentle on yourself and get that stoopwatch/countdown timer. Looks
great in yellow light too.Mike
--- In
Homebrew_PCBs@yahoogroups.com, "Leon Heller"
<leon_heller@h...> wrote:
>
> ----- Original Message -----
> From: "tboneuk_2000" <a_reynolds@b...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Wednesday, January 28, 2004 12:46 AM
> Subject: [Homebrew_PCBs] Re: UV light sources question
>
>
> --- In Homebrew_PCBs@yahoogroups.com, "tboneuk_2000"
> <a_reynolds@b...> wrote:
> > Hello all,
> > I would like to make my own uv exposure box, but I am having
some
> > trouble locating a suitable tube. Could anyone tell me if
> replacement
> > aquariam uv tubes would work (do they opperate at a different
> > wavlength), also can you use disco uv tubes?
> >
> > If anyone knows of a supplier in the uk other than maplin I would
> > appreciate it (RS do sell them but they are very expensive, maplin
> > are out of stock)
> >
> > Thanks for your help
>
> Hello All, sorry for not posting sooner but I have been away on
> buisness for a while.
> A big thankyou for all your surgestions and comments, this has
helped
> a lot.
> Although this maybe not the best solution I managed to pick up a
> couple of blacklight tubes for £5 the pair from a local market
> stall
> (the guy had a stockpile of them and it wasn't finacialy viable to
> stock the 1FT fittings so he was more than pleased to sell at a
> reduced price). Also at a local car boot sale (same sort of thing as
> a garage sale for our american cousins) I picked up a couple of 1FT
> fittings including Balasts, starter etc fot £2. I have made a base
> out of plywood with all the part on and put the whole lot into an
> aluminium case. I'm using Glass for the top, although perspex may be
> preferable (due to UV absorsion on glass) and a timer based on a pic
> circuit.
>
> Glass doesn't absorb much of the long-wave UV used for exposing
PCBs.
>
> Leon
> --
> Leon Heller, G1HSM
> Email: aqzf13@d...
> My low-cost Philips LPC210x ARM development system:
> http://www.geocities.com/leon_heller/lpc2104.html