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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

    ETextile CARD10

    ccc camp 2019

    Extend your CARD10 wristband out into the world….. of etextiles!

    friday, 22-8-19, 19:00-20:30 in the CARD10 village
    saturday, 23-8-19, 18:30-20:00 in the CARD10 village

    >> https://card10.badge.events.ccc.de/en/workshops/

    bring (if you have):
    – your CARD10, USB-C cable, laptop
    – “normal” LEDs
    – scissors
    – pliers
    – sewing needles

    More photos: https://flickr.com/photos/plusea/albums/72157710505658161

    STAGE 1: e-textile hardware
    STAGE 2: micropython software

    STAGE 1: e-textile hardware

    this example shows you how to sew a simple “normal” (not addressable) LED to a GPIO pin of your CARD10.

    !caution! turn off your CARD10 when working on it with conductive thread.

    note: in this example we are skipping to use a current limiting resistor for the LED. this will probably result in a less-long-life of your LED but should not damage your CARD10!

    there are 4 General Purpose In Out pins broken out to sewable vias (plated holes) along the edges of your CARD10 as well as 3.3V and GND.

    Step1) decide
    – decide where the led on your wristband should go.

    Step2) curl LED legs
    – curl the legs of your led to make them “sewable”.
    – take note of which leg is + and which is -.

    E-Textile Cardio LED extension

    Step3) plan your circuit
    – decide which GPIO pin you want to connect your LED to.
    – if you connect the LED+ to the GPIO you need to connect the LED- to GND.
    – if you connect the LED- to the GPIO you need to connect the LED+ to 3.3V.

    in this example we will connect a red LED+ between GPIO1 and LED- to GND.

    Step4) sewing
    – cut a piece of conductive thread only as long as you need to make a connection. likely 20cm of thread will be enough!
    – thread your needle-
    – tie a knot in the far end of the thread.
    – stitch into the neoprene about 1cm away from the GND hole* without sewing all the way through and the come out of the hole of the GND hole on the CARD10.
    – sew around the via 3 times, each time pulling the thread thight
    – sew back into the neoprene and come back out where the knot is sitting on the neoprene.
    – continue sewing to the LED- lead of your LED.
    – sew around the lead 3-4 times and then stitch away 1cm* and tie a knot close to the surface of the fabric.
    – cut the rest of the conductive thread.

    E-Textile Cardio LED extension
    E-Textile Cardio LED extension

    * note: the reason we tie the knots away from the vias and LED legs is so that you don’t have the end of the conductive thread close to the board where fraying thread can cause unwanted connections to neighboring pins

    E-Textile Cardio LED extension
    E-Textile Cardio LED extension

    E-Textile Cardio LED extension

    E-Textile Cardio LED extension

    – cut the ends of the conductive thread really short.
    – if you have: use nail varnish to coat the knots to keep them from coming undone.

    E-Textile Cardio LED extension
    E-Textile Cardio LED extension

    Step5) repeat
    – repeat step 4 to make a connection between the LED+ and GPIO1.

    E-Textile Cardio LED extension
    E-Textile Cardio LED extension

    Step6) test
    – before turning on your CARD10 test your connections with a multimeter.
    – that LED+ is connected to GPIO1
    – that LED- is connected to GND
    – that there is no connection between GPIO1 and GND

    STAGE 2: micropython software

    Step1) firmware
    make sure you have the latest firmware (EGPLANT or higher)
    >> https://card10.badge.events.ccc.de/en/firmwareupdate/

    Step2) app
    download and intall the etextile-tester app:
    download >> https://badge.team/projects/etextile_tester
    intall >> https://card10.badge.events.ccc.de/en/gettingstarted#usb-storage
    in your “apps/” directory create a folder called “etextile-tester” and copy __init__.py there….

    Step3) gpio code
    edit the test code
    GPIO documentation >> https://firmware.card10.badge.events.ccc.de/pycardium/gpio.html
    LED documentation >> https://firmware.card10.badge.events.ccc.de/pycardium/leds.html


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