| 1 | Discard the electromagnet. | |
| 2 | Carefully lift out the little gear and the electromagnet. | |
| 3 | Making an electromagnet at home is fun and easy. | |
| 4 | This current by controlling the electromagnet to control the mechanical movement. | |
| 5 | At the rear of the speaker is a magnet with another electromagnet inside. |
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