Repeat on the second screw (see photo below).ħ. Twist a nut down onto one of the screws so it’s approximately 1/2 inch (1.25 cm) from the nut at the base. The heads of the screws should be on the opposite side of the plastic from the magnet The threads should extend outward on the magnet side. Push the nylon screws all the way through the open holes on one piece of plastic. Be sure the exposed faces of the magnets will attract one another (see photos below).ĥ. Using flat-head machine screws and nuts, attach each magnet to a piece of plastic. Put on safety glasses, and drill all the holes with appropriate bits (see photo below), and then pull off the tape.Ĥ. Approximately one-quarter of the way from each end of the plastic, mark holes for the nylon screws on the plastic pieces. Set the magnet aside and go on to Step 3.ģ. Center one of the magnets on top of the taped plastic pieces, as shown in the photo below, and use a pencil or marker to note the position of the holes on the tape. (This will allow you to drill both pieces at once, so the holes will line up later.)Ģ. Place the two pieces of plastic one on top of the other and tape firmly together, as shown in the photo below. Optional: 10-amp multimeter and an additional alligator clip leadġ.Two alkaline D-cell batteries (do NOT use rechargeable batteries).Battery holder (either commercial or homemade is fine: we used nails pounded into wood).Electrical tape or heat-shrink tubing and heat source.Three feet (1 yard) of 1/8-inch (3-mm) 10-gauge aluminum armature wire.
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