After a lot of tries and not well printed boards with Exposure Box V1 i ended that the problem was the light diffusion (btw my Workbench Power supply 0-30Volt 0-3A was printed on this box with very good result ). And there came the idea of building another new one UV box, hacking an existing scanner box. Scanner box is perfect for this job with a glass installed and a plastic cap. I replaced all the mechanical content of the scanner with 5 blacklight lamps and a home made timer making my life easier while waiting for the pcb exposure.

The first look

New UV exposure BOX

I added a 220V switch and a 220V power plug

New UV exposure BOX

Opening the cap you can see the five blacklight lamps

New UV exposure BOX

New UV exposure BOX

Here is my Workbench Power supply 0-30Volt 0-3A film

New UV exposure BOX

An inside look. For adjusting the distances between the lamps and keeping them stable i cut and put styrofoam covered with aluminum foil. Also the background is a cardboard covered with aluminum foil.

New UV exposure BOX

The timer

The timer

Here i soldered the cables on the back side of the pcb because the drill holes were big and destroyed the routes. Also the white cable replaces a not well printed route as the green one.

The timer

When i first started dealing with electronics i liked the idea of creating my own circuit boards at home. After a lot of searching on the internet i ended that the best way of building proto pcb boards at home is the photosensitive way. So i built an UV exposure box made of wood containing 2 UV philips lamps as shown in the fowlling pictures.

Old uv exposure box

Old uv exposure box

Old uv exposure box

Old uv exposure box

After a lot of tries and not well printed boards i ended that the problem was the light diffusion (btw my Workbench Power supply 0-30Volt 0-3A was printed on this box with very good result ).