I’m designing a circuit that consists of three different PCB linked together with flat cables. The entire project is in a single KiCad schematic and split into different hierarchical sheets. I want to order the three PCBs as a single PCB with V-groves so that I can split them myself.
The problem I’m facing is how to handle the ground planes and voltage sources in the layout.
For example, unless I wire the ground planes together across the V-groove like in the image below, PCBNew refuses to fill all the ground panes.
Though I can see why PCBNew wants me to wire them together, it is not what I want.
So my question is this: Is there a recommended procedure to create a layout in which there essentially are three different circuits?