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Re: gEDA-user: European symbols?
On Jan 2, 2011, at 11:12 AM, "Johnny Rosenberg" <gurus.knugum@xxxxxxxxx> wrote:
> 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?
Mostly because in some countries authors rights are reserved, and must be declined.
>
>> 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
>
>
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