Re: gEDA-user: Symbol Design

[John Doty <jpd@xxxxxxxxx>]

On Jun 20, 2009, at 6:08 PM, Steve Dobson wrote:

> However I am finding that defining the "pintype" to be a bit tricky.
> I've read about the various values but that didn't help me much.   
> For an
> LED package like the HDSP-B03E [1] should the common cathodes be of  
> type
> "pwr", "out", "io" or what?  After all the cathodes in this case can't
> all be connected to ground at the same time, there must be some  
> kind of
> switch circuit so that only the appropriate digit is illuminated when
> the input pins are activated.

When in doubt, use "pas". DRC won't complain about that.

The worldview behind the pintypes is that you are doing pure digital  
design using a single logic family. Once you step beyond that, they  
are pretty useless.

John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd@xxxxxxxxx




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