Some old headphones (for testing the Pringles can speaker)
An empty can of Pringles
A pair of scissors
A measuring tape
Step 3: Making the tube
Firstly cut a strip of paper about 3cm in height, from that strip cut a small piece long enough to wrap around a stack of magnets the same height. Ensure the paper is snugly wrapped and then tape into position. Repeat the process, putting another piece of paper around the first one and again securing with some sticky tape. These paper tubes should slide over each other freely.
Step 4: Making the coil
Take your enamelled wire and tape it to the outer paper, now carefully coil the wire around. Coil it until it's about a third of the way down, remember to keep the wire close together as you wrap it around. When you've gone far enough use another piece of sticky tape to secure into position. Give yourself plenty of wire for both connections of the coil, you can always trim these later if they are too long.
Once your copper coil is secured you can remove the inner paper tube and stack of magnets.
Step 5: Prepare the Pringles can
Now measure up about an 2.5cm from the metal base of the Pringles can and cut it to length with your junior hacksaw. To help you cut straight you can wrap the a4 paper around the can, giving you a straight line to follow.
When the Pringles can is cut, don't forget to give the inside a quick clean and make a small hole for the wires using your safety pin.
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