Arduino 3： LED - - RGB

共陰極 RGB LED

使用random()來隨機產生數值：

1. #define LEDR 9
2. #define LEDG 10
3. #define LEDB 11
4. 
   
5. void setup() {               
6.   pinMode(LEDR, OUTPUT);
7.   pinMode(LEDG, OUTPUT);
8.   pinMode(LEDB, OUTPUT);
9. }
10. 
    
11. int r = 0;
12. int g = 0;
13. int b = 0;
14. void loop() {
15.   r = random(0, 255);
16.   g = random(0, 255);
17.   b = random(0, 255);
18.   analogWrite(LEDR, r);
19.   analogWrite(LEDG, g);
20.   analogWrite(LEDB, b);
21.   delay(1000);
22.  }

改用[可變電阻]改變不同的R、G、B數值：

1. #define LEDR 9
2. #define LEDG 10
3. #define LEDB 11
4. 
   
5. void setup() {               
6.   pinMode(LEDR, OUTPUT);
7.   pinMode(LEDG, OUTPUT);
8.   pinMode(LEDB, OUTPUT);
9. 
   
10.   Serial.begin(9600);
11. }
12. 
    
13. int r = 0;
14. int g = 0;
15. int b = 0;
16. 
    
17. void loop() {
18.   int rREAD=analogRead(0);
19.   int gREAD=analogRead(1);
20.   int bREAD=analogRead(2);
21.      //r = random(0, 255);
22.      //g = random(0, 255);
23.      //b = random(0, 255);
24.   r = map(rREAD, 0,1023, 0,255);  
25.   g = map(gREAD, 0,1023, 0,255);
26.   b = map(bREAD, 0,1023, 0,255); 
27.   
28. Serial.println(r);
29. Serial.println(g);
30. Serial.println(b);
31.   
32.    analogWrite(LEDR, r);
33.    analogWrite(LEDG, g);
34.    analogWrite(LEDB, b);
35.  delay(100);
36. }

Attiny85

1. // This program is in the public domain.
2. // This sketch waits for an IR pulse from a remote control
3. // and then randomly changes the color of an RGB LED
4. 
   
5. int ledPinRED = 2;    // LED on digital pin 2
6. int ledPinGREEN = 1;  // LED on digital pin 1
7. int ledPinBLUE = 4;   // LED on  digital pin 0
8. int inPin = 0;               // the input pin for the IR phototransistor
9. int randRED = 0;
10. int randGREEN = 0;
11. int randBLUE = 0;
12. 
    
13. void setup() {
14.   pinMode(inPin, INPUT);    // declare IR phototransistor as input
15. }
16. 
    
17. void loop(){
18.   while(digitalRead(inPin) != LOW) {};  // read input value
19.   
20.     randRED = random(255); // picking a random number
21.     randGREEN = random(255); // between 1 and 255
22.     randBLUE = random(255);
23.    
24.     analogWrite(ledPinRED, randRED);        
25.     analogWrite(ledPinGREEN, randGREEN);        
26.     analogWrite(ledPinBLUE, randBLUE);        
27.     delay(100);  // de-bounces the input so it does not zoom
28.                  // through a zillion colors with every button click   
29.   }