Photoresistor \ Learning \ Wiring ALPHA 1.0 Search wiring.org.co: Language (A-Z) \ Libraries \ Environment \ Learning \ Hardware Examples: Basics, Library, Topics \ Compare Blink Digital read Serial Analog read Serial Switch Photoresistor Fade Statements and comments Setup and Loop Loop Functions Variables Integers and floats True/False Characters and Strings Character classification Datatype conversion Variable scope Arrays Vectors Split a string and convert it to numbers Bidimensional arrays Passing an array to a function Add strings together Appending to Strings Change the case of a string Characters and Strings Compare strings Create strings from other data types Evaluate, look for, and replace characters in a String length() in a String length() and trim() in a String Replace characters or substrings of a string startsWith() and endsWith() in a String Substring in a String Iteration Iterate through digital outputs Iterate through digital inputs Conditionals Logical operators Increment/Decrement Operator precedence Modulo Sine and Cosine Random LED blink LED blink sequence LED swing 7 Segment led numerical LED display Optocoupler: 4N35 Relay 120-240 VAC Light bulb: TRIAC MOSFET: IRLD024 LED Port Tone keyboard Tone melody Tone multiple Tone pitch follower Switch (button) Multiple switches Hall effect sensor distance (proximity) sensor: Parallax ping Transmissive optical sensor Shift Register: 74LS595 Ultrasonic ranger: SFR04/SFR05 Magnetic field sensor: micromag 3-axis Humidity & Temperature: Sparkfun SHT15 Humidity & Temperature: Parallax SHT11 RGB LED matrix: Sparkfun RGB LED backpack Potentiometer Photoresistor Sensor calibration Smooth sensor readings Force Resistor Air quality sensor: MQ135 Infrared ranger (distance/presence): SHARP GP2D12/120 PiezoFilm (touch/vibration): MSIUSA piezo film Phototransistor Microphone (sound sensor) Electret Microphone: Sparkfun Ambient light sensor: Sparkfun TEMT6000 ADXL335 Accelerometer: Sparkfun ADXRS610 Gyroscope: Sparkfun IDG500 Gyroscope: Sparkfun IDG1215 Gyroscope: Sparkfun IXZ500 Gyroscope: Sparkfun LISY300AL Gyroscope: Sparkfun Air pressure: Motorola Infrared ranger & LEDs Potentiometer & LED Low current sensor: Sparkfun ACS712 Current sensor: Sparkfun ACS712 RGB LED Motor speed Stretch sensor & LEDs Light sensor & LED Attending external interrupts Timer LED blink w/timer This example is for Wiring version 0027+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know. Photoresistor by BARRAGAN Reads values from a photoresistor connected to analog input pin 0 (or A0) and prints the result to the serial monitor The value read from the sensor is proportional to the amount of light that hits the sensor's surface. int sensorValue; void setup() { Serial.begin(9600); // starts the serial port at 9600 } void loop() { sensorValue = analogRead(0); // read analog input pin 0 Serial.print(sensorValue, DEC); // prints the value read Serial.print(" "); // prints a space between the numbers delay(100); // wait 100ms for next reading } Wiring is an open project initiated by Hernando Barragán. It is developed by a small team of volunteers. © Info, Processing © Info