Diy Speaker

I was trying to make a analog VU meter but start having fun with the coil as a speaker. It is really enjoy turning anything to speaker, why not share it.

Supplies

Copper wire(Any thickness will work, keep it under 1mm)

Small magnets, more stronger better. I used from DVD reader reading head.

Any amplifier (amplifier will decide the coil resistance)

and Soldering supplies.

Step 1: The Coil

Wrap the enamel copper wire in a tight loop. To keep maths simple, check your amp's rating for speaker, like my amp uses 3watt/4ohm speaker, so the resistance of my coil should not be much less than 4 ohm. Likewise make your coil, this way isn't that efficient but who would do math.

Step 2: Electronics

Connect the coil wires to speakers section of amplifier, polarity does not matter. Connect the audio and power input wires to amplifier.

Step 3: Diaphragm

Again, the stronger magnets are more preferred. Mine are from DVD reader head assembly. Now whatever you attach the magnets with will be your amplifier. I don't know why it is fun:)