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Title: Vibrating Coil
Credits: Claire Williams
Year of Invention: 2016
Description: This vibrating coil resonates on a surface playing with different rhythms and percussions. Using the principal of the electromagnetic coil observed in speakers and solenoids, sound frequencies between 30-90 Hz will allow to control and activate this hand crafted artefact. These experimentations are part of a larger research shown throughout a electro-mechanical installation. amplifying and materializing sound and electromagnetic principals in a poetical way. It is an ongoing research conducted on crafting experimental textile coils, inspired among others, by the textile speakers experiments of Hannah Peter Wilson.


-Textile speakers: http://www.kobakant.at/DIY/?p=2936

– Igne Oyasi coil: http://etextile-summercamp.org/2014/movement-of-fabric-and-coils/

-1 Bit Textile: http://etextile-summercamp.org/swatch-exchange/1-bit-textile/

-Knitted Coil: http://etextile-summercamp.org/swatch-exchange/knitted-coil/


Materials: Enameled Copper (diameter 0.3), Neodymium Magnet, Class T amplifier, Sound between 30-90Hz
Techniques: Winding
Dimensions (in cm): 1,5 cm diameter



Patterns, Templates, Schematics, Circuit Diagrams (where applicable):

Since this is a very low impedance speaker (less than 1 ohm), a class T amplifier will work best.

Here are some models:

  • Lepai LP2020-A
  • Amplifier with a TA2022 chip – Class T  or TPA3116D2 chip.


Crafting a coil that creates a strong magnetic field.



Step-by-Step Instructions

To build a vibrating coil:

1/ You can find a cylindrical object of approximately 3mm diameter.

2/ Wind your copper on it to create a spring making approximately a 100 turns.

3/ Take it of and attach it to form a loop.

4/ Burn the 2 ends of your copper wire to remove the varnish.

5/ Connect the 2 ends in the right or left output of you amp.

6/ Place your coil on a hollow surface such as a metal bowl for instance.

7/ Download “vibrating_coil.mp3” and put it on your music player and play it with your amp

8/ Add your neodymium magnet in the center of your coil, you should feel the vibrations getting stronger when you place it at the strongest magnetic field position.

NB: Don’t put the volume at maximum position, start at 12 o’clock and then go gradually higher or it might overheat your coil. If you hear or feel a clicking sound it means your volume is too high so lower it down until it stops.








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