[PCB_FORUM] Re: Schematic drafting practices

Frank,
        The more time you spend reading someone else's schematics,
        the more you appreciate the good ones.
        
        
        A few of "Nice to Have's" on a schematic are:

                - Inputs on the left, outputs of the right.
                  (for symbols, and the page in general)

                - One source for an off page connection,
                  to many destinations. Not the other way
                  around.
                
                - No upside down components (rotated 180)

                - Label important signals. (Clocks, Diff Paris)

                - Set a grid, and stay on it.

                - Notes and Labels for important blocks, also
                  for high voltage and isolation. Keep in mind
                  that not everyone reading the schematic will
                  hold an engineering degree. (Don't assume
                  the reader will know your intentions)

                - Print it out a 11 x 17 paper. 
                  Is it still legible?
                  If not fix it.

Regards,
       Mike Finczak
       CopperCAD Design
       www.CopperCAD.com
       905-488-8958


-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of FrankW
Sent: Friday, March 27, 2009 11:55 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Re: Schematic drafting practices

Hello Austin
No I didn't mean all Eng's
Years ago I did train Eng's on how to use PCAD MD
Schematic Capture and I did see some Eng's
who were outstanding in their drawing style
while others sucked real bad. It's funny
though as it's their/your language to communicate
their/your intentions. Something like the English
language some are masters and some speak pigeon.

Thanks group for the replies and suggestions, keep them coming.
Over time I plan on compiling the info I gather
and create a booklet of best practices
and boy I don't have to go far for samples
of graphic pictures of "Do's" and "Don'ts"
Cheers
Frank

:-)




Austin Franklin wrote:
> Hi Alan,
>
>   
>> I guess I'll have to defend the honor of at least SOME of us
engineers...
>>     
>
> I didn't take it he was talking about (all) engineers in general, but
the
> specific ones he was dealing with, or I, too, would have taken to
defend my
> schematic practices.  It's rare (or never ;-) that I see schematics
that are
> as well documented and laid out as the ones I draw.  I do not consider
them
> just a way to get a netlist, like some do, I believe they are =>the<=
> documentation source for an electrical design.
>
> Regards,
>
> Austin
>
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