Thermochromic Tests

Posted on Oct 31, 2018 in Circuits, Craft, Tutorials
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);