Coin Analyzer?

Discussion in 'General Electronics Chat' started by tracecom, Feb 19, 2013.

  1. tracecom

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    Apr 16, 2010
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  2. thatoneguy

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    Magnetic field induces current in copper/silver, altering path of coin.

    Not enough current induced in zinc to alter path.

    Link for one not much for detail. These are in vending machines as well for finding slugs.
     
    Last edited: Feb 19, 2013
  3. gerty

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    Zinc is lighter than copper. Maybe it weighs them ?
     
  4. praondevou

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    I read somewhere they recognize coins by the speed they are falling (with two light barriers. The speed is determined by the braking force through a magnetic field... much like this: http://www.youtube.com/watch?v=nrw-i5Ku0mI

    Don't know if your specific device works like this too.
     
  5. thatoneguy

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    Some sorters work on this principle, but it is VERY slow compared to the magnetic test. 1 penny every other second since the scale/balance takes time to move/reset, vs several pennies per second by slightly altering path or measuring timing.

    --ETA: European patent on sorting coins with magnetics.
     
  6. tracecom

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    I set up a Hall effect sensor and positioned a magnet where it just triggered the sensor. Then I placed a silver quarter between the magnet and the sensor, followed by a zinc quarter, in the hope that one would block the magnetic field more than the other. It didn't work.
     
  7. thatoneguy

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    Penny Sorting Describes a method using the speed difference in a aluminum channel with magnets to sort copper pennies from zinc.

    Video Demo


     
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