Hi,
the symbols mentioned by simon are the generic ones. Sadly not all
manufacturers use the same mapping not even for the same package.
(especially not for to-92 and sot-23)
Right now the best option is to have one symbol per possible arrangement
in the generic lib. We also have a full transistor lib that of course
does not contain every possible part. The intention is that the user
then copies the correct generic symbol, assign the footprint and saves
it under the part name (plus add BOM info to their liking.)
This would not go away with the proposed solution. One would need these
6 symbols and select the correct one for the atomic part. If the pin
mapping is however moved to the atomic definition then it would be
possible to have one symbol (that only has pin names instead of numbers)
and connect them to the pads as needed. (Similar to how eagle does it.)
The problem with adding this would be that it is a bit counter to how
kicad works now. If we add it in addition to the definition in the
symbol then it will be quite confusing. (This is my general fear about
this suggestion. It will add another option on top of the already
possible ones. One of the reason why i would suggest to move some of the
responsibility currently in the symbol into it. Or think about how the
same result can be achieved within the symbol file format. The
inheritance stuff seems to be a perfect fit.)
On 25/05/19 04:57, Andy Peters wrote:
On May 24, 2019, at 2:54 AM, Simon Richter <[email protected]> wrote:
Hi,
transistor symbols (BCE, BEC, CBE, CEB, EBC, ECB) into one and allow
switching mappings during PCB design?
Why is that even necessary? The footprints (TO-92, SOT-23, etc etc) all have
standard pin numbers. The symbol for the transistor should map the E, C and B
to the proper pin number 1, 2, 3. If you place transistor MBT2222A on your
schematic, the correct footprint and correct pin mapping should automatically
follow.
-a
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