Skin electronics

Man Ray - Glass Tears

Anne Marie Zilberman - Freya's Tears

Roy Lichtenstein - The Crying Girl

Design and Fabrication of Soft Artificial Skin Using Embedded Microchannels and Liquid Conductors

"Drawn-on-skin” electronics penned directly on the patient’s skin can create multifunctional sensors and circuits to collect various physiological signals. Cunjiang Yu, University of Houston


Silicone tube

ATTINY 85

DHT11 humidity sensor

3 LEDs

3V flat battery

3 220ohm resistors


To program ATTiny I used a designated programmer shield from Sparkfun. However it is possible without the shield, just using Arduino to send code to ATTiny.

Tiny AVR Programmer Hookup Guide by Sparkfun
PROGRAMMING AN ATTINY85 USING AN ARDUINO 
// ATtiny85 and The Three LEDs
// Wokwi.com demo by Uri Shaked
#include 

#define LED_PIN PB0
#define LED_PIN PB1
#define LED_PIN PB2

int value=0;
int treshold=150;

void setup() {
  pinMode(PB0, OUTPUT);
  pinMode(PB1, OUTPUT);
  pinMode(PB2, OUTPUT);
  pinMode(PB3, INPUT);
  //Serial.begin(9600);
}

void loop() {
  value = analogRead(PB3);
//Serial.println(value);
  delay(100);

  if (value >= treshold) {
    digitalWrite(PB2, HIGH);
  delay(600);
  digitalWrite(PB2, LOW);
  digitalWrite(PB1, HIGH);
  delay(600);
  digitalWrite(PB1, LOW);
  digitalWrite(PB0, HIGH);
  delay(600);
  digitalWrite(PB0, LOW);
  }
  else{
delay(100) ;
 }

  
}

Unfortunately, one of the diode legs was broken during the assembly process and since I didn't have a spare one, there are only two working diodes in this prototype. That's why the dalay time between lighting the diodes up is uneven as the code features three components. Three diodes were means to show a flow-like animation that is not possible with only two diodes, so eventually I did not achieve the effect I was aiming for and the animation looks fairly random

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