HOWTO make a speaker out of a magnet, a cup, legos and wire
This homebrew speaker was hacked together from some legos, wire, magnets and a plastic cup -- according to the build-log, it "performs very well"! 
I didn't expect a high quality of the sound from this made-from-scratch speaker but it performs very well, better than I expected.
I didn't expect a high quality of the sound from this made-from-scratch speaker but it performs very well, better than I expected. A speaker is just a magnet, a coil, frame and a cone or any material that can make the air vibrate. Here is the bill of materials that I used to build this speaker:
# List of materials 1 Magnet (neodymium magnet works great) # 1 Business card # Wire 32 or 34 AWG (you may use 30AWG) # Paper bond # Tape # Glue # Scissors # Ballpoint pen # Lego bricks or wood. # Ruler.
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