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.
....Which reminds me of one time where I spent so many hours and days on end staring at the red and green ortho pattern (2 layers of max density tracks) on the screen, that as I would try desperately to fall asleep late at night, my brain would not stop and I actually ended up having recurring dreams where I was actively doing the lay out--in the dream! I recall however that the primary colors were transposed however due to the retinal memory effect--green and red tracks on a white background instead of red/green and black BG. Bizarre but true... ..you KNOW it's time for a vacation when.... ;-0 > -----Original Message----- > From: Bob Wolfe [mailto:[EMAIL PROTECTED]] > Sent: Friday, February 08, 2002 16:03 > To: Protel EDA Forum > Subject: Re: [PEDA] terminology: ratsnest > > > > Mr. Newberry is correct about the origin of the term, > except that I'd > think > > it began with CAD systems. Generating a rat's nest was simple for a > > computer but not at all simple for a manual designer, so I > never saw a > > manually-done rat's nest drawing. > > Unless we can consider the big pile of mylar cut-ups of parts sitting > in the middle of the layout prior to automanual placement as > a "rats nest" > Robert M. Wolfe, C.I.D. > [EMAIL PROTECTED] > > ----- Original Message ----- > From: "Abd ul-Rahman Lomax" <[EMAIL PROTECTED]> > To: "Protel EDA Forum" <[EMAIL PROTECTED]> > Sent: Friday, February 08, 2002 12:42 PM > Subject: Re: [PEDA] terminology: ratsnest > > > > At 05:47 AM 2/8/2002 -0500, Darryl Newberry wrote: > > >The common rat (e.g. Rattus norvegicus) builds its nest > out of any handy > > >material such as twigs, grass, or leaves. The result has a chaotic, > jumbled > > >appearance. It is just another quirky Anglicism to say > that something > looks > > >like a "rat's nest". > > > > > >This all started back when printed circuits were done with tape and > donuts > > >on mylar sheets--the "rat's nest" was an actual pictorial > drawing showing > > >the placement and the connections drawn as straight lines > between pins. > The > > >nickname and the idea stuck and carried over into CAD systems. > > > > > > [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] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
