Thank you, Mr. Lomax and Mr. Saputelli.  

I had the mistaken impression that the way I was using pads for 
mounting holes for DSUB connectors, that it needed to have a 
corresponding electrical connection in the component.  I was
thinking that I needed to do something special (and I didn't know
what that was) to make a non-electrical hole in a footprint.

Thanks again, Michael



-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Abd ul-Rahman Lomax
Sent: Thursday, October 20, 2005 8:00
To: Protel EDA Discussion List
Subject: Re: [PEDA] Footprint holes that aren't electrical


At 07:50 AM 10/20/2005, Robison, Michael R NAVSEA wrote:
>How can I create holes through a board in a footprint that don't
>have to have an electrical parallel in the schematic component?
>I've been using pads in the footprints to create mounting holes
>and then I have to put dummy pins in the schematic component.

No, there is no particular reason to put those dummy pins in the 
schematic symbol, unless you want the pins electrically connected. If 
not in the schematic, the pads will have no net assigned (and DRC 
will report an error if they are connected), the same as if they 
*are* in the schematic with no net connected.

On the other hand, if you want them connected, they should be in the 
schematic. Otherwise, even if you manually assign them the 
appropriate net, it will be removed whenever you update the board.


Abd ul-Rahman Lomax
LOMAX DESIGN ASSOCIATES
PCB design, consulting, and training
Protel EDA license resales
Easthampton, Massachusetts, USA
(413) 527-3881, efax (419) 730-4777
[EMAIL PROTECTED]


 
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