[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: gEDA-user: European symbols?
Den 2011-01-02 13:13:55 skrev kai-martin knaak <kmk@xxxxxxxxxxxxxxx>:
Johnny Rosenberg wrote:
I didn't add or modify any invisible text except those very
unnecessary (?) author- and license lines. I guess I should
remove them entirely.
License lines are a necessity for sharing. Else, you'd have to
put some license information in the environment of the share.
* the footprint attribute is invisible
Didn't change that either. Why would you like them visible?
Because the footprint information can be scanned at a glance
in the schematic. The footprint needs attention just like the
value or the refdes. So it is convenient to have it visible
by default. If I don't want to see the footprint attributes in
finished design I can still hide them with "Hide specific text"
in the attributes menu.
But if it is invisible, won't it show up with âShow specific textâ in the
same menu?
In addition, the footprint provides a
hint what to look for in the layout when I read the schematic.
Else, a SO23 transistor looks the same in the schematic as a
TO247 with cooler.
200? Strange. Strange. Looks like 300 to me, except the output pin,
which indeed is 200. I didn't change that from the original symbol
either, though.
"200" was just a typo by me...
Somewhere in the documentation pin length 300 is recommended. However,
nobody could give a reason for this value when I asked on this list.
Since pins cannot be differentiated in print from nets, I decided to
opt for short pins in my symbols. That is, 100 units, or sometimes even
zero.
Well, I agree that short pins are better, I will change them in all the
symbols.
If it's not too much work, could you modify the 7400 symbol to your
likings and then send it back so I can modify the other symbols
accordingly?
See below.
Thanks.
Except for the license, the symbol would fit into my collection of
symbols in gedasymbols.org. I prefer the GPL as distribution license.
Maybe off topic, but really, why a license at all, when I really don't
care what people do with the symbols anyway?
As John Doty already pointed out, there is no hard right or wrong
with many design decisions. I am, of course, biased :-)
Well, I asked for suggestions and I got suggestions. So far so good. :)
By the way, I was searching for information about the sym file format, but
I didn't find much. I would like to know what all the numbers mean, for
example in lines like this:
âV 850 500 50 6 0 0 0 -1 -1 0 -1 -1 -1 -1 -1â
The four first is of course coordinates, and there seems to be numbers for
thickness and colour, but I changed a few of them with no result at all as
far as I could see. Can anyone point me to some place where I can learn
everything about this?
/------------------------
v 20100214 2
B 200 200 600 600 3 0 0 0 -1 -1 0 -1 -1 -1 -1 -1
T 500 500 9 20 1 0 0 4 1
&
T 400 4100 5 8 0 0 0 0 1
device=7400
T 700 0 8 8 0 0 0 0 1
slot=1
T 400 2400 5 8 0 0 0 0 1
numslots=4
T 400 1600 5 8 0 0 0 0 1
slotdef=1:1,2,3
T 400 1800 5 8 0 0 0 0 1
slotdef=2:4,5,6
T 400 2000 5 8 0 0 0 0 1
slotdef=3:9,10,8
T 400 2200 5 8 0 0 0 0 1
slotdef=4:12,13,11
V 850 500 50 6 0 0 0 -1 -1 0 -1 -1 -1 -1 -1
P 900 500 900 500 1 0 1
{
T 850 600 5 8 1 1 0 0 1
pinnumber=3
T 850 600 5 8 0 1 0 0 1
pinseq=3
T 750 500 9 8 0 1 0 7 1
pinlabel=Y
T 850 450 5 8 0 1 0 2 1
pintype=out
}
P 200 300 100 300 1 0 1
{
T 150 350 5 8 1 1 0 6 1
pinnumber=2
T 150 350 5 8 0 1 0 6 1
pinseq=2
T 250 300 9 8 0 1 0 1 1
pinlabel=B
T 150 250 5 8 0 1 0 8 1
pintype=in
}
P 200 700 100 700 1 0 1
{
T 150 750 5 8 1 1 0 6 1
pinnumber=1
T 150 750 5 8 0 1 0 6 1
pinseq=1
T 250 700 9 8 0 1 0 1 1
pinlabel=A
T 150 650 5 8 0 1 0 8 1
pintype=in
}
T 200 1100 8 10 1 1 0 0 1
refdes=U?
T 200 0 8 8 1 1 0 0 1
footprint=DIP14
T 400 3900 5 8 0 0 0 0 1
description=4 NAND gates with 2 inputs
T 400 3700 5 8 0 0 0 0 1
documentation=http://www-s.ti.com/sc/ds/sn74hc00.pdf
T 400 3100 5 8 0 0 0 0 1
author=Johnny Rosenberg â johnny.a.rosenberg@xxxxxxxxx
T 400 2900 5 8 0 0 0 0 1
dist-license=None â do whatever you want, I don't care
T 400 2700 5 8 0 0 0 0 1
use-license=unlimited
T 200 900 8 10 1 1 0 0 1
value=7400
T 400 3500 5 8 0 0 0 0 1
comment=use 74_pwr.sym for supply
T 400 3300 5 8 0 0 0 0 1
comment=this symbol was designed according to IEC-(INSERT SPECIFIC NORM)
\------------------------
Thanks for all your inputs!
--
Kind regards
Johnny Rosenberg
_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user