Capacitance is the ability of an object to store an electrical charge. In this workshop we will design and weave textile sensors that respond to our bodies capacitance and use that electricity to complete a circuit.
In this workshop you will learn basic weaving techniques via a plain weave construction and how to apply this technique to the creation of a textile sensor. By the end, you will understand how a textile antenna works and gain a basic understanding of capacitive sensing.
When you have finished warping your loom, tape down the loose ends.
I will begin from the top, weaving the large section of acrylic yarn. I am doubling my yarn to speed up the weaving process.
Once I get to the conductive section, I switch to conductive yarn, weaving with a single strand this time. I follow my cartoon, and only weave in that area. When I am finished I should have two tails on the edge of the weaving.
When finished, move on to the next acrylic section, and weave around the conductive section. The yarn will build up around the antenna, and will eventually even out. Continue onto the next antenna.
When finished, remove textile from loom. (make video)
Sew weaving to felt
With conductive thread, sew from your first antenna to one of the inputs on the capacitive sensing board. In this example, we are only using 3 inputs. And because we are stitching the connections we skip every other input on the board so that there is no chance of threads touching.
The back should look like this, with the knots kept short, so nothing is touching.
Stitch from ground, the black wire, to the ground pin on the board.