You know those crystal sets that people played with many years ago? They enabled you to listen to radio using a high impedance earphone, without a battery, because the radio waves induce a small voltage in the circuit (forgive me if I don’t understand it fully)
Well, I’ve often wondered why thousands or even millions of these circuits couldn’t be connected in series to give us some free meaningful power. If someone could explain..
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Nikola Tesla had the same idea. Unfortunately the power from those radiowaves ultimately comes from the radio transmitter and the majority of the energy is lost. It is a very inefficient way of moving power, you’d need a small power plant and a bery large receiver to wirelessly power a few LEDs or charge a phone
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