Example Projects
Workshops
Actuators
Connections
Power
Sensors
Traces
Circuits and Code Wireless

Conductive Materials
Non-Conductive Materials
Tools
Techniques
Thinking Out Loud
Sensors
  • 3D Printed Sensors
  • Analog Pin Stroke Sensor
  • Anti-Static Foam Pressure Matrix
  • Balloon Sensor
  • Capacitive Fabric Slider/Wheels
  • Circular Knit Inflation Sensor
  • Circular Knit Stretch Sensors
  • Conductive Pompom
  • Constructed Stretch Sensors
  • Crochet Button
  • Crochet Conductive Bead
  • Crochet finger Sensor
  • crochet pressure sensor
  • Crochet Tilt Potentiometer
  • Crochet/Knit Pressure Sensors
  • Crochet/Knit Squeeze Sensors
  • Danish Krown Slide-Switch
  • Resistive Sensors
  • Elastic Button Fabric
  • Embroidered Potentiometers
  • Fabric Button
  • Fabric Potentiometer
  • Fabric Stretch Sensors
  • felted crochet pressure sensor
  • Felted Pompom Pressure Sensor
  • Finger Sensor
  • Fingertip Contact Switch
  • Fish Scale Sensor
  • Fleckerlteppich Pressure Sensor
  • Position Sensing on the Body
  • JoyButton
  • Knit Ball Sensors
  • Knit Contact Switch
  • Knit Stroke Sensors
  • Knit Touchpad
  • Knit Wrist Sensors
  • Knit Accelerometer
  • Knit Stretch Sensors
  • Light Touch Pressure Sensor
  • Neoprene Bend Sensor
  • Neoprene Pressure Sensor
  • Neoprene Pressure Sensor Matrix
  • Neoprene Stroke Bracelet
  • painted stretch sensor
  • Piezoresistive Fabric Touchpad
  • Pin Stroke Gauntlet
  • Pompom Tilt Sensor
  • Sheath Bend Sensor
  • Simple Fabric Pressure Sensors
  • Spikey Stroke Sensors
  • Stickytape Sensors
  • Stroke Sensor
  • Tilt Potentiometer
  • Tilt Sensor
  • Wimper Switch
  • Woven Pressure Sensor Matrix
  • Woven Pressure sensors
  • Zebra Fabric Stroke Sensors
  • Zipper Slider
  • Zipper Switch
  • About
  • E-Textile Spaces
  • Newsletter
  • Print & Publications
  • Shopping Local

  • SEARCH
    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

    Fish Scale Sensor

    This sensor is inspired by the “design” of fish scales and bird feathers: how single elements are repeated, and how it allows the main body to bend smoothly by sliding over the others.

    The scale in this sensor is made with Eeonyx non-woven conductive textile. The carbon is infused on non woven textile in order to maintain 20k ohmm per sq. The size of the scale can vary. I made them around 3cm by 4cm, measuring aprox. 10k ohm from one end to the other.
    When laying flat, electricity flows through series of scales from one end of the sensor to the other, adding the resistance of each scale. This is similar to potentiometer or slider. When bent inward, the scale touches each other in shorter distance resulting the resistance across to become lower. When bent outward, the scale touches further away, or dose not touch at all, resulting higher resistance or discontinuity.
    The reading of this sensor is not smooth, but it gives a unique combination of analog sensor (slider) and digital sensor (contact switch) affect.

    Example Project


    I developed this sensor to use as a part of motion capture costume for performers. The sensor does not give smooth data, but instead gives a big interrupt when the surface angle becomes too big. The combination of range of value and switch like behavior can be actively used for some applications.

    Making of the Sensor


    materials
    -Eeonyx non-woven resistive fabric 20K ohm/sq
    conductive fabric
    conductive thread
    fusible interfacing
    -non conductive base fabric
    -non conductive thread

    Step by step
    Prepare the each scale. Cut out the Eeonyx non-woven into 3cmx 4cm square (or any size you like) Trim the top into round shape and add 2.5-3cm slit from the bottom side.

    Alternatively, you can use vinyl cutter to cut out the shape from Eeonyx, especially if you need to make a lot of scales.

    Here is my cut settings of Eeonyx non-woven for Silhouette Portrait.

    Cur out a small triangle fusible interfacing. Place it next to the slit on the Eeonyx scale and press it with an iron. Peal off the backing paper.


    Fold one of the flap over the fusible interfacing. It will make the scale to curve into 3D shape. Press with iron to fix the fold.

    Cut away the folded end to make a smooth curve. It will look like this.

    Place two small pieces of conductive fabric on the base fabric. This will become a contact post for the sensor. The shape and placement can vary depending on your design.

    Fix the scales onto base fabric. Balance the placement so it forms the fish scale like structure. Use normal thread (i.e. cotton) on the sewing machine. Here, I am using normal running stitch.

    Now, time to make the electrical connection. Wind a bit of conductive thread on a bobbin and set it as bottom bobbin thread. The top thread can stay as normal cotton thread.

    Flip the fabric with scales, so that the scales are now facing down. Stitch the first scale’s connecting point and continue to one of the conductive fabric you’ve placed earlier. Do the same to the last of the row scale as well. Now you have electrical connection to the first and the last scale so you can measure the resistance between the scales.

    When reading with multimeter, it is a bit tricky as multimeters are quite slow (at least the one I have) and it seems to move all the time. It is the best if you hook this up with “Graph” example of arduino/processing. You can observe the nice carve and jump as you move the textile.



    Leave a comment