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30683Re: [midatlanticretro] Building a Better Tape Reader

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  • DuaneCraps
    May 14, 2013
      I might have a easier way but I have not got around to building it yet.
      When  I was playing with my Arduino micro controller I read articles about using led’s as light detectors.
      It got me thinking .....
      led bar graphs displays  have .1 inch spacing to fit in DIP sockets . This is the same spacing as paper tape.
      My idea is to use 2 bar graphs one as a light source and one one as the sensor.
      I did bread board one segment  feeding an OP Amp with a 10K  feedback resistor and got a
      0 to 3.7 volt change with my LED flashlight through a sprocket hole sized hole.
      If anyone wants to run with this, go ahead, you can have the glory
      Sent: Monday, May 13, 2013 12:49 PM
      Subject: [midatlanticretro] Building a Better Tape Reader
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