Thermochromic Tests

Thermochromic pigments change states when you introduce heat. You can control how much it changes by passing current through resistive thread or other resistive materials. Here are a few tests with different threads and resistances.

For more information on how it works, the circuit, and other resources, go here.

Thread: Stainless steel
Resistance: 10.2 ohms
Code: Full sketch here
analogWrite(9, 150);
delay(2000);
analogWrite(9, 0);
delay(200);


Thread: Stainless steel
Resistance: 9.1 ohms
Code: Full sketch here
analogWrite(9, 150);
delay(2000);
analogWrite(9, 0);
delay(200);


Thread: Stainless steel
Resistance: 7.9 ohms
Code: Full sketch here
analogWrite(9, 150);
delay(2000);
analogWrite(9, 0);
delay(200);


Thread: Karl Grimm High Flex 8931 Copper Thread
Resistance: 4 ohms
Code: Full sketch here
analogWrite(9, 250);
delay(2000);
analogWrite(9, 0);
delay(400);


Thread: Karl Grimm High Flex 8931 Copper Thread
Resistance: 2.6 ohms
Code: Full sketch here
analogWrite(9, 200);
delay(2000);
analogWrite(9, 0);
delay(400);


Thread: Stainless steel
Resistance: 12.7 ohms
Code: Full sketch here
analogWrite(9, 200);
delay(2000);
analogWrite(9, 0);
delay(200);