Comment on Your move

CheesyFingers@piefed.social ⁨3⁩ ⁨weeks⁩ ago

• tetris11@feddit.uk ⁨3⁩ ⁨weeks⁩ ago

  Take apart their vape pens for the flashable MCUs, microphones, decent battery, and sweet magnets, and then bounce

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  • cypherpunks@lemmy.ml ⁨3⁩ ⁨weeks⁩ ago

    are there microphones in vape pens now?

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    • tetris11@feddit.uk ⁨3⁩ ⁨weeks⁩ ago

      Yep! The heating coil voltage should only start ramping up when the user is inhaling, and how do you detect that they’re inhaling?

      With a friggin microphone! The negative air pulls the drum up and that’s enough to send a signal to the MCU

      You can see some examples here

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      • cypherpunks@lemmy.ml ⁨3⁩ ⁨weeks⁩ ago

        You can see some examples here

        oh i see, that one doesn’t have a microphone but rather three microphones 🤯

        (previously via hackaday i saw someone turn a disposable vape into a webserver but the use of microphones in them is news to me, thanks)

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      • glibg10b@lemmy.zip ⁨3⁩ ⁨weeks⁩ ago

        Why don’t they do what MAF sensors in cars do? I.e. measure how fast a warm wire cools, which directly tells you how many molecules are hitting that wire and therefore how fast air is flowing past it?

        I’m guessing it’s because microphones are cheap

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