Stretch light by Karmen 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

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
}