5. E-Textiles and Wearables I

This week I decided to work in an e-textile insole. This will have a digital and analogue output.

E-textile Insole

For this assigment i dicided to do something different for turn on the leds, something that you don't need to press a botton with your hands. Why not put the sensors in a place that we use to make a normal pressure, like the foot. So for this reason i chose to do an insole with pressure sensors in front and behind, the normal pressure we make when we walk.

Research

Materials used:

  • 3 leds (red, blue and green)
  • Velostat Pressure Sensitive Conductive Sheet
  • Conductive Fabric
  • Padded material (to separate the conductive sheet)
  • Normal fabric (for the insole design)
  • Bekintex conductive thread
  • Button battery 3V
  • Alligator Leads
  • Wires
*/

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  analogWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  analogWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}

Design and development - Insole

Here the circuit draw I used to guide me.

Materials I used

The most important part of this design and circuit is to be careful about the contact between matarials, wires and the battery. The contact among them can make a electrical short circuit. So always we need to test with a multimeter to discover from where is starting the problem and fix it.

Video - Insole testing