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  • tigerzero

    Fantastic project! I <3 Cryptonomicon! I’m on the last book of The Baroque Cycle, too. Now someone needs to try making a galvanick lucifer :-)

  • theophrastus

    First, very interesting, thankee!

    So i’m assuming the vibrations cause a variation in the resistance of the pencil lead itself. Is the pencil lead balanced over the sharp edge of the razors? (can’t quite make that out in the video) How does the length of the lead affect the bandwidth? Is it compression strain in the lead that causes the resistance to vary? (oh and what is the airspeed of an unladen swallow?)

    • jason1729

      The resistance of the pencil lead does not vary. There is a very tiny area of contact between the lead and the razors and as the lead vibrates, the contact gets better and worse.

      Not sure where you’re going with bandwidth, it’s a totally unrelated concept. What compression strain in the lead?

      Cool project, but it makes me sad to see readers see this as some obscure parlor trick. This is really going back to the first principle of “Making”.

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