/ appliedscience ---- Donate here!
I built a tiny radio into a ballpoint pen that allows the user to hear audio by casually biting the pen.
Негізгі бет Ғылым және технология Covert radio pen with bone conduction speaker
/ appliedscience ---- Donate here!
I built a tiny radio into a ballpoint pen that allows the user to hear audio by casually biting the pen.
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