Re: Serial connector

[Sven Utcke <utcke@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Robert just mailed me:

> I don't have my Poqet with me to measure the expansion bus, but the
> Poqet manual on Brian's site lists the contact spacing as 0.5 mil.

Sure?  That's awfully small!

> The full width of the 40-contact wide connector is about 3 inches.

This would suggest a resolution of 100DPI.  The contact-spacing of the
layout then becomes approx. 0.5mm = 20mil.

Another usefull hint:

> Since the part needed for the serial port also has the key slot, you
> don't need the full width, only the active contacts, and only on one
> side of the board.
> 
> I made the connector for the PQ-0181, but I think it should also
> work on the Classic. It will not work on the Plus, as it has a
> different expansion bus.

Sven
-- 
 _  __                     The Cognitive Systems Group
| |/ /___  __ _ ___                                       University of Hamburg
| ' </ _ \/ _` (_-<  phone:    +49 (0)40 42883-2576      Vogt-Koelln-Strasse 30
|_|\_\___/\__, /__/  fax  :    +49 (0)40 42883-2572             D-22527 Hamburg
          |___/ http://kogs-www.informatik.uni-hamburg.de/~utcke/home.html