Electronics > KiCad

New symbol

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Zoli:

--- Quote from: retiredfeline on November 09, 2021, 05:50:26 am ---Just to help you avoid issues, if you modify a symbol, first create a private library you can write in, because usually the system libraries are protected, then copy the selected symbol into it before modifying. The ECC81 is a dual triode so if modifying to a single directly heated triode you will want to delete unit B which is the second triode and unit C which is the heater. And you'll want to change the pin numbers of course.

--- End quote ---
If you want to do schematics only, you don't really care about anything, but the symbol. When it comes to sharing, you'd better save the symbol under diffent name, and share the .pdf or the whole directory. If you intend to do PCB's, then you REALLY NEED TO CLEAN UP YOUR SYMBOL, and make sure that everything(unit B,C, footprint) is OK.

Karel:
Drawing (complex) symbols or footprints in Kicad V5 isn't easy. It's actually much easier in Eagle (at least in V7).
Hopefully in KiCad V6 things will turn for the better.

retiredfeline:

--- Quote from: Zoli on November 09, 2021, 06:51:57 am ---If you want to do schematics only, you don't really care about anything, but the symbol.

--- End quote ---

Even if you don't want to share, you'll want to save the modified symbol if only to save yourself the work of redrawing the modification, changing the pin numbers, and possibly the pin type, the next time you use it for another schematic. If you have been working with KiCad you'll have a personal library anyway. And they are not PDF files or a directory, a symbol library is a pair of files, a .lib and a .dcm.

jpanhalt:
@bob91343

This may help: https://forum.kicad.info/t/tutorial-how-to-make-a-symbol-kicad-v5-1-x/13336

Going a little deeper, I searched on using a symbol without a package in KiCad.  That is really simple to do in Eagle as symbols and packages are separate.  From a brief review, it seems possible in KiCad, but there were posts about getting warnings about the absence of a package.

retiredfeline:

--- Quote from: jpanhalt on November 09, 2021, 10:11:19 am ---using a symbol without a package in KiCad

--- End quote ---

If by package you mean the physical housing of the component, this is totally possible in KiCad. A symbol in a library does not have to have an associated footprint or 3D model. The footprint will need to be associated later when you are making a PCB, as KiCad would need to know the dimensions of the package.

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