Life Hacks by Instructables.com Thompson Grant

Author:Instructables.com, Thompson, Grant [Instructables.com, Thompson, Grant]
Language: eng
Format: mobi, epub, pdf
Publisher: Skyhorse Publishing
Published: 2014-01-01T08:00:00+00:00

You get what you pay for, but it works!

Step 1: Stack about five to six button magnets to form a one-inch to two-inch cylinder.

Step 2: Cut a strip of paper and roll it around the stack of magnets, and then tape it to itself.

Step 3: Cut a second strip of paper and roll it over the first, and then tape it to itself.

NOTE:

The two pieces of paper should not be connected to each other. Instead, they should be able to slide apart freely. The inner paper is going to serve as a spacer, because when it’s removed, it will create a slight gap between the top tube and the magnets.

Step 4: Wrap about 50 turns of wire around the tube. It doesn’t have to be super tight, but should be firm.

Step 5: Secure the wire coil in place with some hot glue.

Step 6: Pull the stack of magnets and inner coil of paper out of the tube.

You should now have a hollow tube with a winding of wire around it. This is your “voice coil.”

Step 7: Glue the voice coil to the bottom side of a paper plate.

Step 8: Cut the voice coil to a length that will slide over the magnet stack, and hover the wire coil near the top of the magnets.

Step 9: Fit the paper plate with the voice coil over the top of the magnets and glue the plate in place.

I chose to paint the speaker black in an attempt to make it look a little better.

Step 10: Remove the coating from the tips of the wires. You can use sandpaper or an open flame to burn off the enamel.

Step 11: Hook your speaker up to a stereo with a built-in amplifier and press play.

You should hear your music playing out of your paper plate! It’s not going to be very loud because any magnet you can get for this cheap is going to be very poor quality. But it does work and it’s a fun project!

Troubleshooting:

If you don’t hear anything, double check your connections. The two wires from the voice coil should connect to the positive and negative terminals of one channel of your system. It doesn’t really matter which wire goes where, as both will work.

Your stereo will also need to have a built-in audio amplifier to push a higher wattage to the plate. If you’re trying to run this from your iPhone or MP3 player, you might hear a faint noise, but your results will be much better if you first amplify the power output.

If you still don’t hear anything, your wire is damaged (shorting out or broken), you don’t have a good connection with your wires to your audio source, or your magnets aren’t strong enough.

What difference would a stronger magnet make? Let’s find out.

What Makes the Speaker Better?

Download

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