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PCB Design Rules

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Initially PCBs were designed manually by creating a photomask on a clear mylar sheet, usually at two or four times the true size. Starting from the schematic diagram the component pin pads were laid out on the mylar and then traces were routed to connect the pads. If you have many questions of PCB Design, please come here!

Community > Groups > PCB Design Rules > How to work correctly with GND and PWRGND?
How to work correctly with GND and PWRGND?
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Charlie Laub

There is a circuit of me with a couple of bucket converters. The bucket converters are either standalone or getting a PWM signal from a processor and give a feedback to the processor. As far as I know, a star topology is quite useful to avoid EMI problems. How could I do this correctly in KiCad? Is it a need to separate the ground signals with an transformer or a optocoupler?
Statement: This post is only the personal view of the author and does not represent the opinions of


You need to connect GND and PWRGND in one way by yourself. And I suggest you to via an inductor.


It is known that your GND and PWRGND are on different layers, so you don't have the problem of overlapping planes.


For your second question, it depends on the situation. Because some application need isolated power supplies, while some are not. If your application needs such an isolated power supply you need to use Transformers and Isolated DC/DC converters.

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