ECU7 EFI project plans

[Orin Eman]

> You need a spray can of positive photoresist. Radio shack 
> probably has it. You spray it on the clean board (two light coats). 

Anyone seen it recently?  The precoated boards are expensive.
though not so bad at:

http://www.web-tronics.com/webtronics/printed-circuit-board-supplies-positive-photo-resist-pre-sensitized-pcbs.html

> Cure it for 20 mins at about 140F (oven set as low as possible is 
> good). Align your laser printed transparency on the board. Make 
> sure the toner side is down or you loose the details. Sheet of 
> picture frame glass over the top to press it down flat. Expose 4 
> inches under a flourescent tube for 30-60mins per side.  UV lights 

Anyone tried a black light UV tube?  I'd guess the exposure time
will be a few minutes only.

Orin.