Electronics > Beginners
Proper Scope Probing
tggzzz:
--- Quote from: MiDi on November 01, 2018, 11:10:47 pm ---I do not see any disagreement in your post, but want to add one point:
--- Quote from: tggzzz on November 01, 2018, 10:11:06 pm ---It will actually be concentrated underneath the signal wire, no matter how much that wire meanders across the PCB.
--- End quote ---
Mainly true for transition of voltage levels aka high frequency AC (RF), but in steady state aka DC the current will spread over the plane.
At frequencies with wavelength in the order of trace-length or plane-dimensions you enter a different world, but that is way off topic...
--- End quote ---
Agreed.
I included it solely as an extreme example of why it is unwise to elide the concepts of 0V, earth, ground. There are many other examples, of course.
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