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EM field detector & measurement...help!

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by Zell, Nov 21, 2002.

  1. Zell

    Zell New Member

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    Hi everyne..I'm new in this forum!
    Someone can help me in this project?I've some ideas, but I'm not sure I can realize all of them!! :?:

    I'd like to make an EM (electromagnetic) field detector..and if possible, I'd like to measure the field...is it possible?? :shock:
     
  2. Phasor

    Phasor Member

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    Which component do you want to measure - the electric field, or the magnetic field?
     
  3. Zell

    Zell New Member

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    the magnetic component...my Gf has an exam...and I'd like to help her :p
     
  4. dave

    Dave New Member

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  5. Phasor

    Phasor Member

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    To measure a magnetic field, a useful item is a 'Hall effect' device.

    It usually has 3 pins, for supply, ground, and output, and looks a bit like a transistor. The idea is that the voltage at the output pin changes in proportion to a magnetic field. Under no field, the output is half the supply voltage. If you bring it near a north pole of a magnet, the voltage increases, and a south pole will cause it to decrease. Thus, you can not only measure the strength of the field, but the direction, too.

    Are you measuring static fields or alternating fields? This will affect the type of circuitry you need for measuring the output voltage. In other words, are you measuring a DC or an AC voltage?
     

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