Inner schematics of a component


#1

Hi there,
I am trying to learn electronics with KiCad. I am working on a project, where I am trying to control a readily existing board with my own circuit. I would like to design this existing board in KiCad and import as a component, which means that I would like to design inner routings, a capacitor and a resistor inside this board + the pins available. Luckily the board is very simple. But I can’t figure out how to add wirings, components in the library editor. Do I need to add a separate schematic to my project?

Please feel free to correct my phrasing or vocabulary, if my message doesn’t make sense. I am a beginner without formal education in electronics.

Thanks!


#2

What you want to do is common in KiCad, but you are doing it the wrong way.

You probably want to work with Hierarchical sheets:
http://docs.kicad-pcb.org/stable/en/eeschema.html#hierarchical-schematics

It is a bit unclear though what you really want.
If you have an existing board (For example an ESP8266 module) which can be represented by a single physical object (Footprint) on the pcb, then you want to want to create it as a schematic symbol.

If you have some sub assembly, For example a SMPS circuit which consists of an IC, some resistors and capacitors, but you want a single schematic symbol in EEschem to represent it. Then you want to use the Hierarchical sheet stuff in EEschem.


#3

Thanks paulvdh! That seems to be exactly what I wanted to do. My logic was, “let’s observe that board as a component”. But since I know the schematics by looking at it, I wanted to make a “detailed” component schematic, which I can also add to the library.


#4

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