Color Changing Textile

by henryskupniewicz

YellowGreen Tree

This project consists of a circuit made with stainless steel yarn. The Yarn is threaded through the fabric to form the silhouette of a tree and the fabric is then painted green, using blue thermochromic paint, yellow acrylic and fabric medium. When The circuit is completed and the yarn heats up, the blue disappears and the green paint turns to yellow.

Calculations:

1) Needed Resistance

V = I*R

V = 3.7 V

I = 100 mA = 0.1 A

R = 3.7 / 0.1 = 37 Ω

2) Measured Resistance

Trace 1  –    1.1 Ω

Trace2  –     6.3 Ω

Total   =   7.4 Ω

3) Measured Voltage in Battery

3.96 V

4) Calculated Current

I = V/R

I = 3.96/7.4  =  0.54 A  =  540 mA

5) Measured Current

176.7 mA

6) Photos and Video

IMG_0183_xvid