2017互動技術: Week15 是賴小沫的

✎光敏電阻

👀透過光敏電阻改變燈泡顏色

Arduino_ColorMixingLamp範例檔
/*
Arduino Starter Kit example
Project 4 - Color Mixing Lamp
This sketch is written to accompany Project 3 in the
Arduino Starter Kit
Parts required:
1 RGB LED
three 10 kilohm resistors
3 220 ohm resistors
3 photoresistors
red green and blue colored gels
Created 13 September 2012
Modified 14 November 2012
by Scott Fitzgerald
Thanks to Federico Vanzati for improvements
http://www.arduino.cc/starterKit
This example code is part of the public domain
*/
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);
}