This lady recommends "This is one of the two ways to control EMI—eliminate the source or eliminate the antenna."
https://resources.altium.com/p/every...-ferrite-beads
I can't eliminate the source for the simple reason that I have no idea what a user might put within proximity of the device.
As for the antenna, I assume she means protecting the wire. I will have a LOT of unshielded small gauge wires, ranging from 1 to 8 inches (I'm up to nearly 100 switches). I could wind them up in aluminium foil like I see on network cables (I haven't done any research on this subject yet).
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