Magnetizer / Demagnetizer

Discussion in 'The Projects Forum' started by bhanu27, Jan 27, 2010.

  1. bhanu27

    Thread Starter New Member

    Jan 18, 2010
    4
    0
    Dear All,

    Please let me know if you know about good reference circuit to build a magnetizer/Demagnetizer. I searched on google but could not find anything helpful

    Regards
    Bhanu Singh
     
  2. someonesdad

    Senior Member

    Jul 7, 2009
    1,585
    141
    Please specify your problem a little more clearly. For example, what is the coercivity of the material that you want to change? How far away do you need to magnetize/demagnetize these objects? If you don't know these things, just tell us what you want to do with it.

    You can make a great demagnetizer in your shop for tools in a few minutes. Find an old electric can opener (or similar appliance), take out the motor, remove the rotor, and cut a gap in the magnetic circuit of the motor with a hack saw. Put some leads on it and voila -- instant demagnetizer. The deluxe version includes a little box surrounding it and a pushbutton switch.
     
  3. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,172
    397
    To de magnitize an object make a doughnut shaped coil large enough for object to pass thru using a temporary form to wind on about 200 ohms worth of wire and tape it together. Connect to 110 V60 Hz , pass object in & out of center a few times & turn off power., it'l get hot.
     
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