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8. Wearables

References & Inspiration

Wearable Tech Second Skins MalouBeemer

"Wearable technology is any technology that is designed to be used while worn. Common types of wearable technology include smartwatches and smartglasses. Wearable electronic devices are often close to or on the surface of the skin, where they detect, analyze, and transmit information such as vital signs, and/or ambient data and which allow in some cases immediate biofeedback to the wearer.."

Textile Speakers EJTECH is an interdisciplinary artistic duo who work with hyperphysic interfaces, programable material and augmented textiles with medium to investigate the sensorial and conceptual relationships between subject and object with the objective of redescovering emerging structures within realism and metamaterialism. Sound, space, light and time as construction blocks are primary elements in their practice. They analize patterns of develpment processes between technology and the human body. Driven by material investigation, which result in performative instalations, multi channel sonic sculptures and dynamic surfaces. They are highly influenced by the philosophy of New Materialism, Holonic Theory and Somoaesthetic.

ART +: EJTech Studio from Gheada on Vimeo.

Termochromic Ink LectureReference LectureReference


For this assignment, we´ll be creating two actuactor swatches and testing them either with arduino or Attiny.

Visual Actuator; LED

The first exercise I did was a led button and played with the dimming possibilities, as you can see below, the intensity of the led goes down gradually. See code below.


Code for Led dimmer

Use the three backticks to separate code.

int led_pin = 3; // define the pin where the led is connected

void setup() {
  pinMode (led_pin, OUTPUT); //define pin of the Led as an output
  //pinMode (pin, OUTPUT),


void loop() {
  analogWrite(led_pin, 255);
 analogWrite(led_pin, 190);
 analogWrite(led_pin, 127);
 analogWrite(led_pin, 70);
 analogWrite(led_pin, 0);


VISUAL Actuator; Thermochromic Ink


Code for Thermochromic sample

void setup() {
  // put your setup code here, to run once:

 pinMode(9, OUTPUT);


void loop() {
  // put your main code here, to run repeatedly:

 //Change the second value to change the thermochormic ink's
 //behaviour and transparency:
  //Change the delay to keep the heat on longer

  //Turn it off to give your circuit a break
  //Increase the delay to bring the color back


Material exploration; 1

I painted over silk and linen fabric with thermo ink, sew copper wire and conductive thread in different patterns hoping to see how they react differently. However, the copper wire had to be treated before sewing so I removed the wire and used a sandpaper to remove the polish or finishing. The polish somehow interferes with conductivity.

Testing the circuit


As you can see, nothing happened :/ I changed the circuit and tried uploading again to Arduino but nothing happened. The issue is the MOSFET.

SOUND Actuator; Textile Speaker

Looking at thecircuit...the copper routing looks good. The positioning of the 2 components are where they are supposed to. Assuming that all copper traces are conducting properly, the questions would be...

100 ohm resistor...color bands should be...Brown, Black, Brown, Gold Transistor should be...TIP120 Darlington NPN Transistor

Touch B leg of transistor and left leg of resistor Touch C leg of transistor and where it says 'spkr 2' Touch E leg of transistor and the 2 places where it says 'GND'

We did a 'Resistance' check with the multimeter on the resistor to confirm that the resistor is conducting.

The speaker did not work, there was an issue either with the MOSFET or with the circuit itself because there was signal before the resistance but not after the resistance.

Last update: 2023-05-09