Should I link up these ground signals or leave them?
PCB I'm working on has a main board and then smaller secondary boards which contain external components. Everything is isolated and has its own dedicated ground layer; however in Eagle it always shows the yellow airwires for the grounds.
Currently I've just left them as is but I'm curious if this is gonna cause any problems and I should be better off just putting a single connection across for the ground to the main pcb. Do you have any suggestions?
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