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
