Homebrew PCBs

All that tells me is how deep the socket is, and the pitch. I can find diagrams for the sockets all day. I know the pitch, because I select it. What I need to know is the clearance between pads. And I can't eyeball it, this is for a class and we are specifically not allowed to "eyeball" or estimate anything. I have to show where I got my numbers.

If this were for my use only, I could toss a board under my microscope with a ruler and estimate it very closely.

Heck, this book I'm working out of is pretty old. Most of the assignments require 20/20 rules for logic and small signal analog.

Thanks,
Steve Greenfield

--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan <stefan_trethan@...> wrote:
>
> The correct pattern is determined by the mating connector. You should
> find the recommended pattern in it's datasheet, like this for example:
> <http://www.edac.net/file_library/series/39_737.pdf>
> 
> If there is nothing in the datasheet for your connector ask the
> supplier, or eyeball it. There are some differences between the
> different brands of connectors, some have one contact, some have them
> split in two, etc..
> 
> 
> Remember that gold plating the edge connector usually requires you (or
> the board shop) to extend the tongues out and run them together in a
> shorting bar, so they can be contacted for gold plating. Have a look
> at an extremely bad image here:
> <http://t2.gstatic.com/images?q=tbn:d91SlFCXorXWaM:http://www.ettech.com.tw/English/picture/FR-4,%20Edge%20plating,%20Sink%20Milling,%20Medical%20PCB-1%20.JPG>
> 
> ST
> 
> 
> On Fri, Feb 12, 2010 at 6:09 PM, Steve Greenfield <alienrelics@...> wrote:
> > I've done quite a bit of Googling, and all I find are diagrams and measurements of edge-connector sockets. Or just the outer dimensions of the PCB edge-connector. I am looking for the specs for trace width, spacing, and length.
> >
> > Any ideas?
> >
> > Thanks,
> >  Steve Greenfield
> > Electronic Engineering Technician student
> > Electronic Technician 20+ years
> > CET Computers and Consumer Electronics
> > IPC-A-610D CIS Specialist
> >
> >
> >
> > ------------------------------------
> >
> > Be sure to visit the group home and check for new Links, Files, and Photos:
> > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
> >
>