Speakers work through electromagnetism, where a current flowing through a copper wire produces an electrical field that interacts with a true magnet, causing the wire to vibrate and produce sound. I'm gonna teach you how to make one through SCIENCE!
Step 1: Supplies
Gather the following
- Magnet Wire
- Powerful (Neodymium) magnet
- Audio jack
- Paper plates
- Amplifier and Power Source
Step 2: Wrap Paper Around Magnet Stack
You will want to wrap some printer paper around the magnet to serve as a base for the coil (as shown). You do not want it to be too tightly wrapped, so give it a little bit of breathing room.
Step 3: Begin Wrap
Begin wrapping your magnet wire tightly around one end of your cylindrical paper. Do so for about 50 turns, but more does not hurt. Make sure to do the loops fairly tight around the cylinder, and keep them close together unlike what it shown in the image.
Step 4: Attaching
Hot glue (or tape) the cylinder directly to the bottom of one paper plate. This will serve as a the actual vibrating piece of the speaker. Putting some glue onto the coil to keep it in place is not a bad idea.
Step 5: Fitting
Place whatever container you desire to use as the home for your speaker onto the paper plate and draw a circle that lines up with the lip of the container. Here I am using a coffee can painted with blue and white stripes, but yours can be any shape or size.
Step 6: Fitting 2
Now cut out aforementioned circle so that your speaker will fit properly on it's container. Be sure to leave a little bit of overlap so that you can adjust the placement as needed.
Step 7: Audio Jack
Attach your audio jack to the magnet wire coil, with the following configuration:
-Ground and Right on one wire
-Left on the other wire
Be sure to use a lighter to burn off the enamel either while it is connected to the audio jack or before. This will enable the current to flow.
Step 8: OPTIONAL
Wire your speaker directly into an amplifier so that you can control the level of sound and it's quality. Explaining how to complete this step in depth would require a whole new Instructable, so use one of the many guides out there.
Step 9: Final Bits
Place fully wired coil plate on top of the magnet, and hook it up to a laptop/phone to test. The plate should vibrate and produce a sound. If not, check your wire and placement of magnet inside of the paper cylinder.
Step 10: Finishing Touches
Place now functioning speaker into any container that suits your fancy. I chose a box container for mine.