Magnetizer / Demagnetizer

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

  1. bhanu27

    Thread Starter New Member

    Jan 18, 2010
    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

    Bhanu Singh
  2. someonesdad

    Senior Member

    Jul 7, 2009
    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
    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.