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Re: Please help, I need a moving sensor device.

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  • Michael
    Hello, did you ever get your distance sensor working? A draw wire sensor does exactly what you want....but maybe too expensive. I was searching group for
    Message 1 of 18 , Jul 1, 2012
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      Hello,
      did you ever get your distance sensor working?
      A "draw wire sensor" does exactly what you want....but maybe too expensive.
      I was searching group for info on using optical mouse as a movement detector.

      Mike



      --- In Electronics_101@yahoogroups.com, "gonnavis" <gonnavis@...> wrote:
      >
      > >
      > > With any quadrature encoder, it is easy to get direction and count. Here is a unit that works with RC servos for robotic applications:
      > > http://www.nubotics.com/products/ww11/index.html
      > >
      > > MANY years ago, I built such an encoder with a simple flat washer spinning on a shaft that was painted black with white stripes. I used sensors to 'see' the stripes:
      > > http://www.junun.org/MarkIII/Info.jsp?item=14
      > >
      > > There are a number of manufactured incremental encoders:
      > > http://www.usdigital.com/products/encoders/incremental/rotary/shaft/s4
      > >
      > > Here is an FPGA hack of a computer mouse
      > > http://www.fpga4fun.com/QuadratureDecoder.html
      > > As stated in the article, it is far easier to create a quadrature encoder in an FPGA than it is to build a PS/2 interface. Nevertheless, there is a PS/2 interface project at opencores.org. I have used it for keyboard input but I have never tried it for mouse input. I would use the mouse hack at fpga4fun.
      > >
      > > Richard
      > >
      >
      > Thanks, That's great!
      >
      > I have tried to learn PS/2 mouse communication, and found it far more complicated than PS/2 keyboard.
      >
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