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Variable footprints for through holes components (or using tracks in footprints)
816 2
balno 4 years ago

Hi there,

To me, it would be a really nice feature.

Infortunately, due to manufacturers, some through holes components have various pinouts.
For instance the J-FET N J201 has two known pinouts :

fets_misc_001b.jpg
It would be so cool to be able create a single footprint handling these two pinouts.

You can create a footprint with tracks in it, maybe this way :
capture_bf245.png
But the tracks added here are ignored when you route the PCB (or maybe I'm not aware of the procedure, which is possible).

In these peculiar case, it would be great to be able to connect a track to either G pads, allowing the use of any pinout on a given PCB.

Not a priority feature I think, but a great one in my case.

BTW I love this software and using it practically on a daily basis and I would thank all the team for this, such a great work !

Cheers from France.

François

Comments
andyfierman 4 years ago

What you are talking about is sometimes referred to as Dual-footprinting.

You can do this using the information described here:

https://easyeda.com/forum/topic/How-to-avoid-DRC-errors-when-connecting-to-PCB-Footprints-a-k-a-PCB-Libs-90bf944fe3644b21a7d27a9e9d8df8d6



As long as you make the cross connections inside the footprint out of pads then you can make an error free footprint.

Note that, in the EasyEDA PCB and Footprint Editors, if you draw a piece of track and then right-click on it you can convert it to a pad.

  • You must however think very carefully about mapping the pin numbering of the Schematic Symbol onto the pad numbering of the PCB Footprint to avoid confusion.
  • You should also make it clear on the Footprint (maybe in the Document or a Mechanical layer) which package variant fits into which set of pads.
Reply
balno 4 years ago

@andyfierman Thanks !!!

Reply

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