Supplies

• One battery: Lithium Ion (Li-Po) 3.7 V - 400 mAh.
• Electrical cables or a reel.
• Padding foam.

Now, before assembly, first get the lithium battery and the microcontroller: we're going to install the activation mechanism. I'm sorry I didn't think to take a photo here too. Solder the black wire from the battery to the "-" terminal on the microcontroller and solder the red wire to a power cable. Also solder a cable to the microcontroller's "+" terminal, and another cable to the battery's red wire.

For what follows, remember above all that all the electronics must be inside the cube and that the electrical cables will have to pass through layers of fabric between the inside and the places where there is conductive fabric. Connect the "+" terminal of the microcontroller to the conductive fabric under the button on the coloured fabric cover (you'll need to pass through several layers of fabric to do this). Then connect the battery's 3.7 V terminal to the conductive tab on the tongue (you'll need several layers of fabric to do this). This way, when the tab is hooked to the button, there is electrical contact and the system is switched on, and vice versa when the tab is hooked to the other, non-conductive button.

Next, connect the microcontroller to the 12-pin "A" sensor and secure all the electronics to the base face using tape for example.

N.B.: remember to fix the microcontroller so that the USB-C connector is visible when you open the zip.

Then assemble the coloured fabric cover and the fabric with the electronics. To do this, push the tab through the 2 cm hole and align the zip with the line cut in the black side (base of the cover). Stitch to secure the components. You can also check at this point that the activation mechanism is working properly. This is how it should look:

Then stitch the corners of each button between the conductive part and the embroidered part. Finally, all that's left to do is close the cube using this method, then add the padding foam to the inside of the cube. And that's it! The controller is finished!