Re: gEDA-user: European symbols?

[Stephan Boettcher <boettcher@xxxxxxxxxxxxxxxxxx>]

Philipp Klaus Krause <pkk@xxxxxxx> writes:

> Am 31.12.2010 16:31, schrieb Stephan Boettcher:
>> 
>> Maybe your time is better invested by using a small FPGA for whatever
>> you want to build, and learn Verilog to express the logic.  
>> 
>> Depends how much fun can have from learning such stuff.  A deadline does
>> not seem to be your problem.
>> 
>> (It should be possible to draw a gschem schematic, export a verilog
>> netlist and upload that to the FPGA too, for parts of the circuit you
>> feel more comfortable, but then you'd need to do both, symbols and
>> Verilog :-)
>> 
>
> Well, sometimes you just need a few gates somewhere, e.g. one of my
> boards contains just a 74LS21, a capacitor and an EPROM. 

Well, we were talking about some library of symbols, presumably to
express some more complex logic.  To review a logic circuit diagram, it
helps if you have symbols that are easy to read.  A circuit with a
single gate of glue logic does not need this kind of review.

If Johnny wants to design a circuit with 74xx/4xxx series parts, he
needs a schematic that he can easily review himself, and symbols that he
grew up with will certainly help.

If somebody needs to design a circuit expressed via schematic entry and
some PHB demands those IEEE symbols, or the reviwer audience wants it
that way, then such a library will be usefull too.  I'd still try to
convince said PHB to accept Verilog instead, but that may also be a
waste of time.

> Using a FPGA or even a CPLD would be overkill. While I prefer the "US"
> symbols even though I grew up in germany; I know people that prefer
> other symbol styles, and if they were there for those that want to use
> them.

I grew up with the symbols in the rightmost column here (DIN40700):

  http://de.wikipedia.org/wiki/Logikgatter#Typen_von_Logikgattern_und_Symbolik

from a German TV series by Jean PÃtz (1974, at age 10).

I still find the US ANSI 91-1984 column easier to parse than the IEC
60617-12 symbols.

-- 
Stephan



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