اردوينو: البيت الذكي : تمرين 4: مصباح متعدد الالوان داخل البيت

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 Parts required:

 1 RGB LED

 three 10 kilohm resistors

 3 220 ohm resistors

 3 photoresistors

 red green and blue colored gels

انسخ  الكود التالي:

const int greenLEDPin = 9;    // LED connected to digital pin 9

const int redLEDPin = 10;     // LED connected to digital pin 10

const int blueLEDPin = 11;    // LED connected to digital pin 11

const int redSensorPin = A0;  // pin with the photoresistor with the red gel

const int greenSensorPin = A1;   // pin with the photoresistor with the green gel

const int blueSensorPin = A2;   // pin with the photoresistor with the blue gel

int redValue = 0; // value to write to the red LED

int greenValue = 0; // value to write to the green LED

int blueValue = 0; // value to write to the blue LED

int redSensorValue = 0; // variable to hold the value from the red sensor

int greenSensorValue = 0; // variable to hold the value from the green sensor

int blueSensorValue = 0; // variable to hold the value from the blue sensor

void setup() {

  // initialize serial communications at 9600 bps:

  Serial.begin(9600);

  // set the digital pins as outputs

  pinMode(greenLEDPin, OUTPUT);

  pinMode(redLEDPin, OUTPUT);

  pinMode(blueLEDPin, OUTPUT);

}

void loop() {

  // Read the sensors first:

  // read the value from the red-filtered photoresistor:

  redSensorValue = analogRead(redSensorPin);

  // give the ADC a moment to settle

  delay(5);

  // read the value from the green-filtered photoresistor:

  greenSensorValue = analogRead(greenSensorPin);

  // give the ADC a moment to settle

  delay(5);

  // read the value from the blue-filtered photoresistor:

  blueSensorValue = analogRead(blueSensorPin);

  // print out the values to the serial monitor

  Serial.print("raw sensor Values \t red: ");

  Serial.print(redSensorValue);

  Serial.print("\t green: ");

  Serial.print(greenSensorValue);

  Serial.print("\t Blue: ");

  Serial.println(blueSensorValue);

  /*

  In order to use the values from the sensor for the LED,

  you need to do some math. The ADC provides a 10-bit number,

  but analogWrite() uses 8 bits. You'll want to divide your

  sensor readings by 4 to keep them in range of the output.

  */

  redValue = redSensorValue / 4;

  greenValue = greenSensorValue / 4;

  blueValue = blueSensorValue / 4;

  //  print out the mapped values

  Serial.print("Mapped sensor Values \t red: ");

  Serial.print(redValue);

  Serial.print("\t green: ");

  Serial.print(greenValue);

  Serial.print("\t Blue: ");

  Serial.println(blueValue);

  /*

  Now that you have a usable value, it's time to PWM the LED.

  */

  analogWrite(redLEDPin, redValue);

  analogWrite(greenLEDPin, greenValue);

  analogWrite(blueLEDPin, blueValue);

}