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2 grounds on 1 PCB, for 2 batteries connected in series
My ideas is this. I know voltage is measured in paralel, so I have 2 batteries (12V each) in series. I connect 1 voltage monitor circuit to the upper battery's + and - (battery
2). I connect the second voltage monitor circuit to the lower battery's + and - (battery 1). I need ground on the upper circuit and the lower circuit? The grounds must be
separated? Can this be done on a PCB? Say 1 layer, internal copper 1 is ground 1, and botttom copper is ground 2. Do I have to connect the 2 layers toghether (star them) and
how do I do it in KiCad?
I am a bit unfamiliar with the ground concept! I know the ground is just a low resistance conductor (10 on -7 ohms) which attracts electrons. It has a low reference potential
(and generators are always grounded for defence). But what the heck can a small PCB layer do? Is there any point of putting 2 grounds on 1 PCB even? Should I use blind vias or
normal ones? Whats the difference?
Sorry, its not many questions, its 1 question with all the details combined as 1!
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