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woven paper cup speaker

by:JIAHE     2020-01-20
The coil of this speaker is a membrane that vibrates at the same time to make the sound you can hear.
This speaker is woven on a round loom with paper cups, and its efficiency is certainly not very high or very loud.
But it does look good.
Material: * paper cup * sewing line * guide wire (
Use high conductive threads like CarlGrimm copper)
* Nd magnet (s)
* Adafruit mono amplifier * 3.
7 V lipo battery * audio jack cable * sound source tool: * pencil * tape measure * sewing needle * scissors or scissors measure uniform space on the top edge of the paper cup using tape measure.
I chose 1 cm spacing for my warp, but you can also try more dense or sparse spacing.
Intensive spacing will result in intensive weaving and will take longer to make.
Sparse spacing leads to more loose weaving, which will be faster, but if it is too loose, you will get space between the threads where the air can pass, so, the vibrating film won\'t work that well when moving the air, so your speakers will be quieter.
The mark around the edge is where the warp will go.
In order to make weaving easier, make sure that your warp line crosses the edge and is flat with the surface.
Use some strong sewing thread to thread a pointed needle.
Start sewing from inside to outside, leaving extra lines behind, we will use it to tie the ends of the line.
As shown, sew back and forth in the center of the Cup.
Dealing with this problem correctly is the most tedious part of the process.
Now the warp is ready to knit.
To weave between wawrp lines, you can use a sewing needle woven with a weft, or, you can cut out a shuttle with an old credit card or the same thick plastic.
If you have a laser cutter and some acrylic resin on hand, this is also an easy way to make a shuttle.
Please see the attachment for good shuttle shape.
Before you start knitting, sew your wire through a needle and through the outside of the cup to the inside.
Finally, make a knot and pull until the knot hits the wall.
This will be one of the two contacts for your speaker.
Now begin to weave by simply winding the warp line more than 1, less than 1.
Since you can\'t see the formation of the pattern, the first round will look messy.
After the first 2-
It will become easy to see 3 rounds.
After starting from the whole round of wire guide, switch to non-
Conductive sewing wire (
Yarn or string can also be used).
Make sure your non
The guide wire separates the guide wire so that it does not touch itself.
If the guide wire is insulated and exposed to itself, then the electricity can flow from one part of the line to the other, and will not be forced to flow around the circle, which is when the magnet attracts and repels the permanent magnet, the cause of the stronger vibration caused by the enlarged magnetic field.
You can pause and test your speakers at any time along the way.
Simply clip the two outputs of the amplifier to both ends of the guide wire and play music through the amplifier. Listen closely.
Even if your spiral is only a few laps, you should be able to hear some sound.
Because the length of the guide wire may not be very long, it may be too conductive, causing the amplifier to be cut off.
Try turning down the volume, or add a 7 ohm resistor in series with the speaker spiral.
Continue weaving as long as you like.
The more surface area you fill in, the greater your membrane, the more air it moves, and the greater the sound.
After the weaving is completed, sew the other end of the wire to the outside of the cup and tie the knot.
Connect your speakers and listen to it.
I haven\'t found a great way to fit the magnet near the center of the woven magnet.
I am posting this structure in the hope that someone can come up with a good solution. Enjoy.
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