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    Content by Mika Satomi and Hannah Perner-Wilson
    E-Textile Tailor Shop by KOBAKANT
    The following institutions have funded our research and supported our work:

    Since 2020, Hannah is guest professor of the Spiel&&Objekt Master's program at the University of Performing Arts Ernst Busch in Berlin

    From 2013-2015 Mika was a guest professor at the eLab at Kunsthochschule Berlin-Weissensee

    From July - December 2013 Hannah was a researcher at the UdK's Design Research Lab

    From 2010-2012 Mika was a guest researcher in the Smart Textiles Design Lab at The Swedish School of Textiles

    From 2009 - 2011 Hannah was a graduate student in the MIT Media Lab's High-Low Tech research group led by Leah Buechley

    In 2009 Hannah and Mika were both research fellows at the Distance Lab

    Between 2003 - 2009 Hannah and Mika were both students at Interface Cultures
    We support the Open Source Hardware movement. All our own designs published on this website are released under the Free Cultural Works definition

    Soft Interactive Technology Course at KHB

    Time: May 16,18 2018 10:00- 17:00 (15:00 on 16th)
    Time: May 30, June 1 2018 10:00- 17:00
    Location: eLab, Weissensee Art Academy Berlin
    This workshop is only open to KHB students

    This is a series of 4 workshops to learn how one can move textile surface with electricity. In the first workshop, participants will learn how to build flap wings and flip dots that moves with electromagnets. The second workshop is about experimenting with Shape memory alloy and smocking and pleating of fabric surface. The third and the fourth workshop is to learn how to connect them with microcontrollers (Arduino) and control them with sensors or simple animation sequences.

    Controlling with Arduino

    Transistor Switch

    IRB8743 mosFET transistor (N channel) pin configulation

    Details of the Transistor switch >> http://www.kobakant.at/DIY/?p=6118

    Breadboard view of the Transistor Switch. SMA or Coil is connected to the Battery*. If you are using 9V battery, make sure to use resistor (3W or 5W) between battery and SMA/coil so you do not exceed maximum current.

    Now you can upload the “Blink” example code from File/Examples/Basics/Blink and see if it works. Make sure to adjust the on/off timing of the code so you do not activate the coil/SMA too long.

    Breadboard view of the Transistor Switch with a push button. Do not forget to add pull-up resistor to the button. The size of the pull-up resistor should be 10K ohm or bigger.


    The second workshop is about learning how to train and activate the Shape memory alloy and experimenting with various textile techniques to embed them so they move the textile surface.

    Here is an explanation on what is Shape Memory Alloy:
    “A shape-memory alloy (SMA, smart metal, memory metal, memory alloy, muscle wire, smart alloy) is an alloy that “remembers” its original shape and that when deformed returns to its pre-deformed shape when heated. “
    from wikipedia

    SMA example project

    Animated Vines by Jie Qi >> http://technolojie.com/animated-vines/

    Bacterial Motility by Erdem Kiziltoprak

    Bacterial Motility from Arden Lev on Vimeo.

    Hylozoic Ground by Philip Beesley

    The Culture Dress by Afroditi Psarra and Dafni Papadopoulou

    SMA tutorials

    There are several nice tutorial on how to use SMA

    tutorial by Jie Qi

    For this workshop, we have Flexinol LT 0.01 from robotshop

    When you heat up this SMA to 70 degrees, it will change it’s shape to the memorized shape. (Please see this post for how to memorize the shape on SMA >>) You can use hot water or hair drier or candle, anything that reach 70 degrees to change the shape of SMA. When you use candle or open frame to change the shape, be careful to not to heat it up too much. You can retrain the SMA when you heat up too high, and it will forget the shape it was memorized before.
    SMA is also conducive. In the datasheet of this SMA, it states 18.5 ohm/m. When you apply electricity and let the current go through the SMA, it will also heat up. See the next section for why.

    SMA preparation

    SMA remembers 1 shape by training it. Note that it does not remember 2 shapes. When heated over certain temperature, it goes to the shape that is trained, but it will not go to another shape when it is under that temperature. So, when you want to move surface with SMA, you need to plan how it returns to original position from heated state position.
    Tutorial on how to train SMA >> http://www.kobakant.at/DIY/?p=6682

    Tutorials on how to connect SMA >> http://www.kobakant.at/DIY/?p=6684

    SMA smocking example

    For the details of how to construct the SMA smocking swatch example, see the below link

    I have also tried with pleated fabric.. the result is not very beautiful, but one can try in this direction as well.

    One can also use non trained SMA. In this case one side of the SMA shrinks when heated and creates “U” shape.

    Tutorial on moving fabric petals >> http://www.kobakant.at/DIY/?p=3396


    On the first day of this 4 days workshop series, we investigate on movements we can make with electromagnets. Participants will learn to make the following two swatch samples to learn how electromagnetism works, and how one can apply on textile to move them.

    Electromagnetic Flapping Wing
    Flapping Wing fabric >> http://www.kobakant.at/DIY/?p=5900

    For the detailed instruction, please go to the below link
    Flapping Wing fabric >> http://www.kobakant.at/DIY/?p=5900


    Flip-dot fabric >> http://www.kobakant.at/DIY/?p=5915

    flip dot test

    This sample is inspired by the 1bit textile by Irene Posch and Ebru Kurbak

    Small intro to Electromagnetism

    An electromagnet is simply a coil of wire. It is usually wound around an iron core. However, it could be wound around an air core, in which case it is called a solenoid. When connected to a DC voltage or current source, the electromagnet becomes energized, creating a magnetic field just like a permanent magnet. The magnetic flux density is proportional to the magnitude of the current flowing in the wire of the electromagnet. The polarity of the electromagnet is determined by the direction the current. The north pole of the electromagnet is determined by using your right hand. Wrap your fingers around the coil in the same direction as the current is flowing (conventional current flows from + to -). The direction your thumb is pointing is the direction of the magnetic field, so north would come out of the electromagnet in the direction of your thumb. DC electromagnets are principally used to pick up or hold objects.
    (from http://www.coolmagnetman.com/magelect.htm)

    An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.
    (from https://en.wikipedia.org/wiki/Electromagnet)

    Magnetic field produced by a solenoid (coil of wire). This drawing shows a cross section through the center of the coil. The crosses are wires in which current is moving into the page; the dots are wires in which current is moving up out of the page.

    The magnetic field lines of a current-carrying loop of wire pass through the center of the loop, concentrating the field there

    Simple coil experiment

    Electric Motors also work with coil and electromagnetism. Here is a link to a good explanation of the inside mechanism of motors >> http://www.explainthatstuff.com/electricmotors.html

    There are small DC motors and flat vibration motors which maybe interesting to embed in textile projects.

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