Stretch light
by Karmen Franinovic <http://people.interaction-ivrea.it/k.franinovic>

Controls a light’s intensity by pulling a stretch sensor (rubbery ruler). The stretch sensor is made of conductive rubber, that changes resistance when it is streteched. The stretch sensor is connected to analog input pin 0 The LED is connected to the analog output (PWM) pin 0

Created 15 May 2004
Revised 26 January 2008
 

    
// Stretch light 
// by Karmen Franinovic <http://people.interaction-ivrea.it/k.franinovic> 

int val; 
 
void setup() 
{ 
  // nothing for setup 
} 
 
 
void loop() 
{ 
  val = analogRead(0);          // read analog input pin 0 
  val = (val - 400);            // min value read from the stretch sensor was 400 
  val = constrain(val, 0, 1023); // constrain value 
  analogWrite(0,val);           // write value to PWM (analog) output 0 
  delay(50);                    // wait 50ms for next reading 
}
           
     
           
           
           
         
           
           
    Circuit schematics: the LED is connected to Wiring PWM pin 0. The stretch sensor is connected to Wiring analog input pin 0.