Step 3: Stitch the traces on the sweatshirt

Picture of Stitch the traces on the sweatshirt
From the front of the garment, feel out where the conductive pads you sewed on the swatch are. Mark them with pins, and stitch lines from the two switch leads to the edge of the zipper, being sure not to cross the leads. At first I tried to use conductive thread for the power, too, but it turned out that the resistance accrued over such a distance was prohibitively high, so I later added two small flexible wires (stranded wire) to connect the battery to the circuit board.