You'll probably get off cheaper picking up one of those 36W nail dryer boxes than buying all the parts. I bought one of these:
http://www.ebay.com/itm/New-36W-110V-Nail-Art-UV-Salon-Gel-Curing-Tube-Light-Dryer-4-X-9W-Lamp-3-/180832116113?pt=LH_DefaultDomain_0&hash=item2a1a6f1d91#ht_4636wt_1301 Just take it apart and rebuild it. They were even nice enough to include some unpopulated pads on the PCB that you can use to solder in a pot and some resistors to make the timed mode variable. The timer is nothing but a simple 555.
If you're making small breakout boards you can just mod it so that the timed mode is variable and slide your board right in. The picture frame i was using to hold the mask down to the board didn't quite fit, so i took a dremel and widened the opening. I also didn't like that the bulbs aren't all on the same plane, so i cut the two on the edges out, made some new holes and superglued them back in. I found when exposing boards inside the nail dryer that it works quite quickly. I only needed to expose for about 43 seconds.
--- In Homebrew_PCBs@yahoogroups.com, "Mario Mikulandra" <mmaudioelectronics@...> wrote:
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> Yep, nail polish tubes will do the job. Not actually designed for photo chemical process but they are fine.
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> Btw, what the heck is wrong with the messaging system? There is an annoying lag!? :-|
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