Homebrew PCBs

>I don't know
>why, I used have a darkroom and develop photos and such. 

Possibly because you think developing PCBs is as involved as 
developing photos. The following, in reference to photographic 
method of doing PCBs, is from the Pulsar website;

================================
This has been the most common method for the serious "midnight 
engineer" as well as R&D divisions of larger corporations who do 
their own designs.

This process requires a lot of support equipment. Darkroom, hot roll 
laminator to apply dry film (or buy expensive pre-sensitized PCB 
blanks), use one of several methods to make your film negative, UV 
exposure lamp & counter, contact print frame, trays and processing 
chemicals! There is a lot to it on the "setup" side. 

As you can see, this can be a pretty involved procedure and the 
system takes up quite a bit of dedicated space. It's not the fastest 
and it's not the cheapest method, however, results can be extremely 
good and it does allow for limited mass production capabilities.
================================

Trust me, the above is a long outdated approach. However, convenient 
to use if one is in the business of selling TT supplies.

--- In Homebrew_PCBs@yahoogroups.com, "lcdpublishing" 
<lcdpublishing@...> wrote:
>