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frezik@midwest.social ⁨6⁩ ⁨months⁩ ago

Piezoelectric effect is when you vibrate certain crystals and they give off electricity. It’s also reversible. You can feed them electricity to generate sound. The beep-boop from electronic devices is usually from a piezo speaker, because they’re dirt cheap.

You don’t get significant amounts of power out of it, though.

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