PCB success!

[jorgen.bergfors at idg.se]

>...
>I thought about that, but it's no good for negative process. I have my 
>art
>run out on an imagesetter. A 9" x 12" sheet is about $10.
>...
>I tape the negative the with Magic Tape(tm), stick it in a picture frame
>covered with aluminum foil and take it outside. I get a drafting 
>boarding
>perfectly perpendicular to the sun, place the picture frame on it and
>remove the foil. 40 or 50 seconds is plenty in the middle of the day 
>when
>there's the most UV. Late afternoon is troublesome, especially in the
>winter, because there's much less UV. There's a latent image on the 
>board
>so you can tell if you got a good exposure.
>...

Well, I wanted to show that there is a method that is very quick and reliable. 
You don't have to wait for films to return from the service bureau or a sunny 
day when you're not at work.
With my method, you can go from circuit idea to working module in a single day.

/Jorgen