At 04:16 PM 2/8/2002 -0500, Darryl Newberry wrote: >I see this thread won't die so I have to jump back in for a sec.... > >I'm getting old but I swear that once upon a time saw a PCB guy with a >vellum sheet with straight colored pencil lines drawn on it, being used as >an overlay to show the from-tos. OK maybe it was in another galaxy far far >away....or maybe it was in a dream.
All kinds of crazy things have been done by designers. As I mentioned, I think that red-blue was one of those. I seem to vaguely remember some story that red-blue was invented and promoted by the company that made the film. As to a manually drawn ratsnest, had I been the CAD manager, I would have seriously considered firing that designer. It would take a *lot* of time to draw that overlay, time which could be much better spent actually getting the job done. The purpose of a ratsnest display is to help in placement, and it recalculates when one moves a part. Imagine doing a manual drawing and then "recalculating" the ratsnest upon moving a puppet! Computers are good at that kind of thing, people not. I did once do a drawing that might have been interpreted as being what Mr. Newberry described, but it only showed bus connections, an entire bus was represented as a single line. This was a board that had multiple buses running all over the place, and the drawing was essentially my reminder of what ICs belonged together. In that sense it functioned somewhat like a modern ratsnest display functions, it was an aid in a placement study. >my brain would not stop and I actually ended up having recurring dreams >where I was actively doing the lay out--in the dream! You haven't earned your stripes as a professional PCB designer if this hasn't happened to you.... [EMAIL PROTECTED] Abdulrahman Lomax Easthampton, Massachusetts USA * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
