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    Content by Mika Satomi and Hannah Perner-Wilson
    The following institutions have funded our research and supported our work:

    From 2013-2015 Mika is 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
    Sensors

    Fabric Stretch Sensors

    Creating stretch sensors from stretchy fabrics that have conductive/resistive properties that change depending on the stretching of the fabric. I’m hoping this will allow to make super simple stretch sensors and lead to other interesting possibilities.

    So far we have tested a range of Eeonyx stretchy fabrics that are coated in doped polypyrrole, an inherently conducting polymer. The first results are interesting, but we have yet to test these in a specific situation.



    In this video I am testing four different stretch conductive fabrics from Eeonyx. Numbers 1, 2, 3 and 9 based on the total number of ten that they sent me. You can see details in the photo of the chart bellow.

    11 Comments so far

    1. […] Homemade bend sensor Homemade Fabric/Stretch Sensor Electroluminescent β€œwire” (EL-wire) (4.95 $) Alcohol sensor (4.50$) Solenoid (1.42 $) Linear […]

    2. ramyah on July 23rd, 2010

      hey,
      I ordered some conductive fabrics last week and have been trying a few things too..your experiments are really nice.
      Could you tell more about the circuit to the micro-controller.(for e.g circuit schematic)
      Thanks A lot!

    3. admin on July 23rd, 2010

      I connected the fabrics to the analog to digital converter pin of an Arduino board. In most cases the (10-20K) pull-up resistors worked well but sometimes i got better results by using external 5K or over 100K pull-ups. To smooth the readings you can add a low-pass filter, which you would do by placing a 4.7 to 10 uF capacitor in parallel to the pull-up resistor (from analog input to VCC).
      Hope this helps!

    4. ramyah on July 24th, 2010

      yep, thanks a ton πŸ™‚
      though my circuit is still quite noisy,I managed to get some results. I am working with a small sample of electrolycra in which the resistance change is very little for which i had to also use an Opamp.
      Overall, i think this is a good start πŸ™‚ thanks again!

    5. Todd on October 17th, 2010

      Hi, this looks like awesome research. Based on your table of stretch and resistance for each sample. #1 looks the most promising for detecting various stretch percentages; do you by any chance know the Eeonxy part number for sample #1? I would like to order some to experiment with myself. If you’ve made any further progress I would also be interested in hearing about it.
      Thanks.

    6. admin on October 17th, 2010

      i added a photo of the Eeonyx sample sheet. the item numbers batch the numbers in the video.
      hope this helps!

    7. Todd on October 17th, 2010

      That helps a lot; thanks!

    8. Session 5: Sensors | Tech Crafts on October 4th, 2012

      […] Knit Stretch Sensors by Kobakant Constructed Stretch Sensors by Kobakant Fabric Stretch Sensors by Kobakant Finger Sensor by […]

    9. Adrien on October 15th, 2014

      Hi-
      this is an old thread and unfortunately, Eeonyx does not seem to carry these products anymore. Does anyone know where to source fabric that would act as a somewhat precise stretch sensor? Thanks!

    10. internetizen on November 10th, 2014

      Can you please tell me what kind of software you used? Thanks!

    11. […] Resistive carbon coated stretch fabric Eeonyx Company: Eeonyx Characteristics: Resistive material, stretchy in both direction, can be used to make stretch sensor example: Fabric Stretch Sensors http://www.kobakant.at/DIY/?p=210 […]

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