How to Make a BIG and Powerful Electromagnet with the Primary of the transformer of a microwave oven. Remove the Secondary. With Iron or Steel (ferromagnetic materials) it attracts with a really great strength. With non ferrous metals like aluminum and copper it repels them due to Eddy currents.
<p>Quick question, could you cut off the excess ends of the &quot;E&quot; to lighten it?</p>
It is possible, but I don't know how much, because the E does an important function. Increases the magnetic permeability so the magnetic field is channeled better in one direction.
How hot does it get, and could I cut the excess ferrite off the transformer to make it lighter?
<p>Got it! Strong enough to lift itself using a hammer like in the video.</p><p>Here's a couple photos of my setup, and my ad-hoc DC power supply to run it without blowing the wall fuse.</p><p>It's a 12 V rectified DC power supply using about $15 of Radioshack stuff I had in my office.</p><p>1. Connect the white wire from a wall plug adapter one of the two black input wires of a Radioshack 120VAC to 12.6VAC transformer (about $12).</p><p>2. Connect the black wire from the wall plug to a 4A 125V 5x20mm fuse ($0.50) between and then to the other black input on the Radioshack transformer (the black input on the same side as the first black input above).</p><p>2. Connect the two yellow output wires to the &quot;~&quot; inputs on a Radioshack 400V 8A full wave bridge rectifier ($3). </p><p>3. Connect the positive (+) output of the bridge rectifier to one of the primary coil electrodes on the microwave transformer/electromagnet. </p><p>4. Connect the negative (-) output of the bridge rectifier to the other electrode on the primary coil of the electromagnet coil.</p><p>5. Plug in your AC plug to a power strip with an on/off switch.</p><p>6. Switch it on and enjoy the Electromagnetism! </p><p>7. Study Physics and do science!!!</p>
<p>How long can you keep the magnet on without tripping a breaker? Have mine hooked up to a power strip which trips after a few seconds. Tempted to plug directly into a wall outlet but i dont want to risk overheating the coils.</p>
<p>Hi, could you tell me what is your input source (voltage value) and if this electromagnet works with AC (50 - 100 Hz) input?</p><p>Thank you</p>
<p>230 volt 50 Hz. But if you live in a 120 volt 60 Hz country you will find microwave oven transformers that work with that values so it is more or less the same.</p>
<p>Thank you very much..</p>
<p>Hi,</p><p>What did you connect the wires from the primary core to? </p>
<p>What is the rating on the transformer you used for this? </p>
I dont know. 230 V, 2000 Watts
How strong is it?

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