Re: Circuit that produces a tingling sensation in the fingers.

From: Rich Grise (rich_at_example.net)
Date: 12/10/04

  • Next message: Roger Johansson: "Re: Circuit that produces a tingling sensation in the fingers." 
    Date: Fri, 10 Dec 2004 20:09:39 GMT

    On Fri, 10 Dec 2004 18:15:29 +0000, Roger Johansson wrote:

    > "Jim Douglas" <james.douglas@genesis-software.com> wrote:
    >
    >> Check out the medical device called a "Tens" unit, it's send a small
    >> tingle.
    >
    > The first part of the problem is to find a set of nerves on/in the body
    > which can be used to "see". The fingertips are sensitive, but very small.
    >
    > I would try the skin on one of my thighs, it is fairly easy to attach a
    > thin elastic cloth around it and leave it on all day.
    >
    > Then I need a way to excite the nerves in the skin of my thigh.
    >
    > 200*300 points, or more, on the inside of the cloth will excite the
    > nerves and create a picture which wraps around my thigh, and I use the
    > nerves in the skin to "see" it.
    >
    > The idea about electrostimulation fits well into this device.
    > I would simply try different combinations of frequencies and currents
    > until I found a setting which gave the best "image" without being painful
    > in any way.
    > Mechanical stimulation is also possible, but would be a little more
    > difficult to manufacture.
    >
    > A small videocamera can be hidden below or above my own face, in a
    > band around my head, like a tennis player's sweatband, for example.
    >
    > So I would feel with my thigh what the camera sees.
    >
    > With some training it could become really useful.

    Put the device _in_ the sweatband, and feel it on your forehead.
    For my second choice, I'd go chest or back. But as Mr. Woodgate has
    mentioned, the thigh is probably one of the least sensitive pieces of skin
    that you have. Then again, this might simplify the design.

    Y'know, this could turn out to be an interesting project!

    But I still say that applying electric shocks doesn't sound like the best
    way to do things.

    Hey! How about some of those microphonic/piezoelectric SMT caps? ;-)

    Good Luck!
    Rich

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