After testing the capacitive touch sensor breakout with various conductive fabric materials, I wanted to create an array of conductive thread traces that could be used to activate the touch sensor instead. This instructable will demonstrate how to connect conductive thread to a capacitive touch sensor, to make switches out of conductive thread.

Materials list:

  • Capacitive touch sensor breakout (MPR121)
  • Conductive thread
  • Solder
  • Solid core wire
  • Fabric (preferably neoprene or a fabric with cushion of the sort)


  • Soldering iron
  • Wire stripper
  • Needle nose pliers
  • Needle

Step 1: Conductive Thread Connector

To create the connection from the capacitive sensor to the conductive thread, you need to create a loop on the end of a solid core wire to sew the thread onto, which will then be soldered onto the sensor via the other end of the wire. Use the wire strippers to strip the end of the wire, then bend the ends into a loop using the needle nose pliers. You can then close the gaps of the loops by soldering. This method was inspired by this instructable on conductive thread female connectors. (https://www.instructables.com/id/Conductive-Thread-Female-Connector/?ALLSTEPS) Create as many connectors as you want to create switches (this sensor allows up to 12 connectors).

<p>Such a cool idea! It would make it easier for mobile users if you move the info from your PDF to the instructable. Thanks for sharing and welcome to the community! </p>

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