I’m new to PCB Design and Layout and need some help understanding GND Planes.
Is it necessary to include them in the Design and do I even need them? Doesn’t the GND Signal come directly from the Power Supply to a Pin on a power connector and Routes to whichever Pin of the Micrcontroller or Component. Do we even need a GND Plane?
The reason why I’m asking is I’m watching this Youtube video on creating a design and layout from scratch.
I realize now since I’m not familiar with Design Guidelines, the layout rules in the video seem a little beyond my understanding. In this video, there seem to be Island/Pools where the Board’s components are not filled with the GND Plane and others which are filled.
It all seems a bit arbitrary to me, so I’m afraid I might mess something up. I am wondering if I can do away with the GND Plane and Pools/Islands completely. Or does it matter if the GND Islands are not exact? I don’t want to accidentally Ground Power or Signal Pins of the Microcontroller or components.
I’d just like to understand if this is necessary.