Hi, Scott

    I looked at google and found your first message and it sounds really
interesting. It should make nice and slow hobby gyros for many people ! I
was not able to find the follow up message where you would give more details
! Could you repost it here at the piclist ? I would love to see more details
before I start to make holes on all my buzzers :-)

Best regards,
Alexandre Guimaraes

> Once upon a time I posted at comp.robotics.misc (think it was 1/1/2000) a
> brief little article about a DIY piezo-gyro using a nail through a piezo
> disk. A Tokin rep once said they would sell me some for $10 a piece (the
> cheap ones commonly used in camcorders to stabilize image), but never did.
I
> wonder why  }8^|
>
> One day I must see how well a MHD gyro works - A homopolar rotor using a
> current through drop of mercury in a magnetic field and sensing the
induced
> voltage/current.
>
> Scott

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