Introduction

Here you will find all instructions for setting up the TNNI armband v1. Let me know if you have any questions!

  1. To begin, use the following CAD file to laser-cut four electrodes.

2.5x longer CRE (Tripolar, 16mm) v10.stl

Snap off the end of each electrode to disconnect the three rings from each other. Crimp the ends of 12 wires, and connect a wire to each individual ring on every electrode. Split the middle wire of each electrode into two so that each electrode has a total of four wires extending from it. Connect all wires to an OpenBCI Cyton board using a wire-connector.

  1. Construct the foundation of the armband by sticking two pieces of KT tape together, sticky sides facing each other. To create the croc-and-jibbitz design, poke equidistant holes in the armband so that there are three rows and as many columns as fit across the band. Each column should be approximately 2.5 cm apart.

  2. Create the flexible jibbitz that hold the electrodes using the following CAD file.

Flexy Thing v4.stl

Laser-cut four copies of this shape from a 3 mm tall sheet of silicone. Attach the electrodes to the jibbitz using medical tape.

  1. To hook the jibbitz into the armband, 3D print four copies of this CAD file using PLA.

Pin Thingy short v1.stl

Push the hooks through the flexible jibbitz and slip the other end through the holes in the armband, securing the jibbitz to the KT tape. Place the electrodes onto the armband so that two electrodes lay on top of the wearer’s wrist, and two below.