12. Skin Electronics

This week builds upon the foundations laid during Week 5 (E-Textiles) and Week 9 (Wearables). It brings together the creation of electronic circuits with a focus on integrating them with the human body, specifically exploring the interplay between our skin and gestures.

Research

I found immense amazing project in Katia Vega's interactive makeup projects. Building on this, I envisioned creating a circuit activated by the simple act of pressing one’s lips together. Since my focus was on exploring electronic-skin interfacing, I delved into makeup designs that could elegantly connect the mouth to other areas of the face, combining functionality with aesthetic appeal. Katia Vega

References & Inspiration

I Inspired by the elegance of anklet tattoos, I explored ways to merge light and cosmetics in electronic-skin interfaces, integrating glowing elements to elevate both functionality and visual appeal.

Materials

1 Headphone wire

2 Eyelash gel

3 makeup

4 battery

5 XIAO ESP32-C3

6 neopixels

My sketch

While I tried sketching the design, I’m not very confident in my drawing skills, so I need help expressing the idea clearly. The anklet would feature a flexible circuit that responds to touch or movement, with discreet LEDs and sensors.

I envision a lightweight, comfortable design that can be worn daily, offering a unique combination of fashion and function. I plan to make it adjustable for ease of use and comfort.

Code Example

// Pin definition for 5 LEDs
const int ledPins[] = {3, 4, 5, 6, 7}; // LEDs connected to GPIO3 to GPIO7

void setup() {
  // Set all LED pins as OUTPUT
  for (int i = 0; i < 5; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
}

void loop() {
  // Blink LEDs sequentially 3 times
  for (int i = 0; i < 3; i++) {
    for (int j = 0; j < 5; j++) {
      digitalWrite(ledPins[j], HIGH); // Turn LED on
      delay(500);                     // Wait 500ms
      digitalWrite(ledPins[j], LOW);  // Turn LED off
      delay(500);                     // Wait 500ms
    }
  }

  // Keep all LEDs on for 10 seconds
  for (int i = 0; i < 5; i++) {
    digitalWrite(ledPins[i], HIGH);  // Turn LED on
  }
  delay(10000);  // Wait 10 seconds

  // Turn off all LEDs for a short pause
  for (int i = 0; i < 5; i++) {
    digitalWrite(ledPins[i], LOW);   // Turn LED off
  }
  delay(500);    // Wait before repeating
}

Circuit diagram

Process and workflow

First trials

First, I tried to embed my circuit into my leg using eyelash gel as an adhesive, but I felt a sense of fear and hesitation because I wasn’t sure what might happen to my body. The uncertainty of how the materials—like the gel, wires, and electronics—might interact with my skin made me question the safety of the process. I was especially concerned about potential allergic reactions, irritation, or unforeseen effects caused by prolonged contact with the gel and the conductive components. This moment made me reflect on the importance of understanding the materials I use, not only for their functionality but also for their impact on the body. It was both an exciting and unsettling experience, pushing me to carefully consider the intersection between technology and the human form.

Video

In addition, you can use Vaseline to gently remove eyelash glue used in skin electronics, ensuring proper care for your skin. Vaseline acts as a mild, skin-safe adhesive remover, effectively breaking down the glue without causing irritation. Simply apply a small amount of Vaseline to the glued area, let it sit for a few minutes, and then gently wipe it away with a soft cloth or cotton pad. This method helps preserve your skin's natural moisture barrier while preventing unnecessary tugging or damage, keeping your skin healthy and smooth.