Photoresistor
by BARRAGAN <http://barraganstudio.com>

Reads values from a photoresistor connected to the analog input pin 0. The value read from the sensor is proportional to the amount of light that hits the sensor surface. The value read is printed through the serial to be monitored in the console.

Created 12 April 2005
Revised 4 April 2007
 

    
// Photoresistor 
// by BARRAGAN <http://barraganstudio.com> 

int val; 
 
void setup() 
{ 
  Serial.begin(9600);           // sets the serial port to 9600 
} 
 
void loop() 
{ 
  val = analogRead(0);          // read analog input pin 0 
  Serial.print(val, DEC);       // prints the value read 
  Serial.print(" ");		// prints a space between the numbers 
  delay(100);                   // wait 100ms for next reading 
}