Color Identificator

1
2int S2 = 7;  //Setting up pins of the color sensor
3int S3 = 8;  //Setting up pins of the color sensor
4int outPin = 4;  //Setting up pins of  the color sensor
5unsigned int redPulseWidth;  //variable to measure the red component  in the color shown to the color sensor
6unsigned int greenPulseWidth;  //variable  to measure the green component in the color shown to the color sensor
7unsigned  int bluePulseWidth;  //variable to measure the blue component in the color shown  to the color sensor
8float redVolt;  //variable to store the voltage to be written  to red pin of the RGB led
9float greenVolt;  //variable to store the voltage to  be written to green pin of the RGB led
10float blueVolt;  //variable to store the  voltage to be written to blue pin of the RGB led
11
12void setup() {
13  pinMode(S2,  OUTPUT);  //setting pins S2 AND S3 as output pins
14  pinMode(S3, OUTPUT);
15  pinMode(outPin, INPUT);  //setting outPin as input pin
16  Serial.begin(9600);  //starting the serial port
17}
18
19void loop() {
20  digitalWrite(S2, LOW);  //by setting S2 AND S3 low we are reading the red component of the color
21  digitalWrite(S3,  LOW);
22  redPulseWidth = pulseIn(outPin, LOW); //we are storing the red component  as a number between 1,02,400. P.S. THE BIGGER THE NUMBER SMALLER THE COLOR COMPONENT  AND VICE VERSA
23
24  digitalWrite(S2, LOW);  //by setting S2 low and S3 high  we are reading the blue component of the color
25  digitalWrite(S3, HIGH);  
26  bluePulseWidth = pulseIn(outPin, LOW);  //we are storing the blue component as  a number between 0 and 1,02,400
27
28  digitalWrite(S2, HIGH);  //by setting S2  AND S3 high we are reading the green componet of the color
29  digitalWrite(S3,  HIGH);
30  greenPulseWidth = pulseIn(outPin, LOW);  //we are storing the green  component as a number between 0 and 1,02,400
31
32  redVolt = redPulseWidth/400.-1;  //turning the pulse widths into numbers between 0 and 255
33  redVolt = (255 -  redVolt);  //then reversing the smaller number into bigger one and bigger number  into smaller one
34  greenVolt = greenPulseWidth/400.-1;
35  greenVolt = (255  - greenVolt);
36  blueVolt = bluePulseWidth/400.-1;
37  blueVolt = (255 - blueVolt);
38
39  Serial.print(redVolt);
40  Serial.print(", ");
41  Serial.print(blueVolt);
42  Serial.print(", ");
43  Serial.println(greenVolt);
44  delay(250);
45
46  //writing all the conditions and setting the redVolt, greenVolt, and blueVolt  accordingly because as you can see in the serial monitor the red, blue, and green  components are similar 
47  //and if we pass on these values straight to the RGB  it won't work. Hence, we are writing the following conditions
48  if(redVolt>greenVolt  && greenVolt>blueVolt){
49    redVolt = 255;
50    greenVolt = greenVolt/2;
51    blueVolt = 0;
52    }
53    
54  if(redVolt>blueVolt && greenVolt<blueVolt){
55    redVolt = 255;
56    blueVolt = blueVolt/2;
57    greenVolt = 0;
58    }
59
60      if(greenVolt>redVolt && blueVolt<redVolt){
61    greenVolt = 255;
62    redVolt  = redVolt/2;
63    blueVolt = 0;
64    }
65
66    
67  if(greenVolt>blueVolt  && blueVolt>redVolt){
68    greenVolt = 255;
69    blueVolt = blueVolt/2;
70    redVolt = 0;
71    }
72
73    
74  if(blueVolt>redVolt && redVolt>greenVolt){
75    blueVolt = 255;
76    redVolt = redVolt/2;
77    greenVolt = 0;
78    }
79
80    
81  if(blueVolt>greenVolt && greenVolt>redVolt){
82    redVolt = 0;
83    greenVolt  = greenVolt/2;
84    blueVolt = 255;
85    }
86    redVolt = redVolt*8;
87    blueVolt  = blueVolt/8;
88    greenVolt = greenVolt/8;
89
90    analogWrite(10, redVolt);  //writing values to RGB pins of the colour   
91    analogWrite(9, greenVolt);
92    analogWrite(3, blueVolt);
93    
94}