Theory behind evanescent wave coupling, aka wireless power

[Alan Yates] is building a persistence of vision display and needs a way to transfer power from the stationary base to the spinning circuitry. He’s decided to go with wireless energy transfer and he’s sharing all of his research and experiment data from the development process. It comes in two forms, the written version we just linked to, and a 37 minute video which is embedded after the break. If you liked some of the inductive energy transmission devices we’ve featured in the past, [Alan's] video will fill you in on the why’s and how’s by using a combination of illustrative schematic examples and measurements on test coils that he built.

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