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GROUNDED: EMC/EMI & PCB Design Nuggets

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Dario Fresu

PCB Hacker - Team

PCB Hacker - Founder

Why do lights turn on instantly if electrons move slower than a snail?



Most engineers miss the real answer.


In circuits, signals travel at 150 million m/s, but electrons crawl at 73.4 μm/s. Why?


It’s not electrons pushing energy, it’s electromagnetic fields.


My latest article, "Redefining Current and Charge," explains this.


Fields carry energy outside wires, in the space between PCB traces or cables.


The Poynting vector proves it: power flows in the dielectric, not the conductor.


Current is just the result of fields moving charges.


Even charge isn’t what you think.


Want to rethink electromagnetism?


Read my article here.


Dario Fresu,


Fresu Electronics


PS. Grab some coffee, this is a long one.

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