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Jewasity · Nov 10, 2026

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Researchers built a battery-free temperature sensor that runs on the magnetic field around ordinary AC wiring. A graphene coil harvests the energy, and capacitors store enough to last a day without power. It only works near live wires.

Researchers built a battery-free temperature sensor that runs on the magnetic field around ordinary AC wiring. A graphene coil harvests the energy, and capacitors store enough to last a day without power. It only works near live wires.

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