John,
I have been able to find the IEEE and ASME standards online on the Internet. They are usually in PDF and some may be freely downloaded for non commercial usage because they are copywrited material.
--For IEEE 315-1975 (R1993) "Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters)" see message number 11068 to see where to go to get a PDF copy that can be downloaded. This standard was withdrawn by ANSI as an American National Standard (ANS) as of June 2004. The IEEE has this as an active standard but there has been no activity on it since being reaffirmed in 1993.
--For ASME Y14.44-2008 "Reference Designations for Electrical and Electronics Parts and Equipment" I went to a Chinese Website <www.> and ended up at <www.doc88.com/p-6030462696.html>. This is viewable and maybe can be downloaded but the process is not straight forward.
--For ASME Y14.34-2008 "Associated Lists" I also went to the Chinese Website <www.> and ended up at <www.doc88.com/p-5990462641.html>. Again, this is viewable and maybe can be downloaded but the process is not straight forward.
Regards, Larry 9V1/WN8P
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--- In kicad-users@..., John Hudak <jjhudak@...> wrote:
LOL, well said!
(I am not a developer in this effort, but have been on others). I've often
wondered this myself. Having seen this lack of attention to standards in
other open src tools, I can guess at many reasons, ranging from ignorance
to arrogance to cost (acquiring some of those standards requires real
money).
In many cases, there is quite a lot of overlap between
IEEE/ANSI/IEC/CENELEC etc.
OTOH, I am thankful for the tool....
I am very interested in the response.....
-John
On Wed, Jun 6, 2012 at 10:37 AM, Lawrence <lawrence_joy@...> wrote:
**
To developers of Kicad and others.
Comments about Eeschema.
--Why are the X,Y coordinates upside down in the Y axis? When I learned
Cartesian coordinates the abscissa (X axis) has positive values going to
the right and negative values going to the left with the ordinate (Y axis)
with positive values going up and negative values going down. Quadrant I
would have the 0,0 point in the lower left corner. Do they teach this
differently in Europe? It is very confusing to me.
--Terminology for reference designators: A basic reference designator has
a class designation letter(s) and a number. Class designation letters are
1, 2, or 3 letters, but if 3 letters are used the 1st letter will be X as
in XDS or XAR. For the complete reference designator A1R7, the A1 is called
the reference designator prefix and for the complete reference designator
A1PS1C3, the A1PS1 are called reference designator prefixes. The Unit
Numbering Method of assigning reference designators is covered by ANSI/ASME
Y14.44-2008 (used to be ANSI/IEEE 200-1975).
--I have seen in many messages the term "multi-part component" used. The
terminology I know is "mulple-element part" and is covered in ANSI/ASME
Y14.44-2008, Clause 2.1.4 Suffix Letter.
--The terminology I know calls a listing of parts a "parts list (PL)" and
is covered by ANSI/ASME Y14.34M-2008 Associated Lists. In this standard it
is stated that "bill of material" is an obsolete term.
Just some ramblings.
Regards, Larry 9V1/WN8P
