Time Sensing Bracelet

Step 5 Sewing

Before sewing the conductive connections we need to sew the perfboard into place with some non-conductive stitches. We may as well sew the strip of Velcro to the other side of the neoprene while doing this. If you dont have sticky Velcro for the other side you will have to sew this too. Otherwise just peel and adhere.

• The circle will be your +5V
• The Ring will be your variable resistance
• The rectangle will be your pull-up resistor

To understand the reason for having pull-up resistors, follow this link >>
http://cnmat.berkeley.edu/recipe/how_and_why_add_pull_and_pull_down_resistors_microcontroller_i_o_

The three conductive stitches come very close together and we want to make sure that they do not touch each other inside the neoprene, where we cannot see them. So you have to remember where you have stitched.

CIRCLE
Sew from the circle of conductive fabric to the furthest left perfboard hole connected to a male header, bypassing the pull-up resistor.

RECTANGLE
Sew from the end of the pull-up resistor closest to the perfboard to the middle hole connected to one of the three male headers.

RING
Sew from one of the ends of the ring to the other end of the pull-up resistor to the last hole of the three on the perfboard.

I attached a metal popper to the center of my conductive circle, because I wanted to be able to connected a piece of rotate-able metal to it, that I can turn and it will stay in one place making a constant connection there between the conductive circle and resistive ring.

One last thing we have to cut and sew is a little conductive finger-cap from stretch conductive fabric (no fusible interfacing). Trace your fingertip and cut it out twice, then sew together with conductive or non-conductive thread. Turn inside-out. Finished.