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LED_RGB/LED_RGB.ino

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+/*
+  Fade RGB LED Smoothly through 4 colours
+  Fades an RGB LED using PWM smoothly through 4 different colours pausing for 1.5 seconds on each colour.
+  
+  Connect an common Cathode RGB LED with appropriate resistors on each anode to your Arduino Uno; 
+  Red to pin 11, Green to pin 10, Blue to pin 9, Cathode to GND.
+  
+  Developed for Arduino Uno by Joshua David - TechHelpBlog.com
+   
+  Please Feel Free to adapt and use this code in your projects. 
+
+ Contact me at techhelpblog.com and let me know how you've used it!  
+ */
+
+// Assign LED Output PWM Pins
+int Red = 11;
+int Green = 10;
+int Blue = 6;
+
+//Set Initial Values
+int RedVal = 0;
+int GreenVal = 0;
+int BlueVal = 0;
+int fade = 10;  // Delay Time
+
+// Colour Value 1 as each colour intensity (0-255)
+int RedVal1 = 186;
+int GreenVal1 = 0;
+int BlueVal1 = 255;
+
+// Colour Value 2
+int RedVal2 = 9;
+int GreenVal2 = 239;
+int BlueVal2 = 26;
+
+//Colour Value 3
+int RedVal3 = 255;
+int GreenVal3 = 120;
+int BlueVal3 = 0;
+
+//Colour Value 4
+int RedVal4 = 0;
+int GreenVal4 = 255;
+int BlueVal4 = 78;
+
+//Set initial mode (Colour Value Mode) to Colour Value 1
+int mode = 1;
+
+void setup()
+{
+
+ //----------------------- Assign outputs
+   pinMode(Red, OUTPUT);
+   pinMode(Green, OUTPUT);
+   pinMode(Blue, OUTPUT);
+ //----------------------- Write Initial Values of 0 to outputs
+   analogWrite(Red, RedVal);
+   analogWrite(Green, GreenVal);
+   analogWrite(Blue, BlueVal);
+
+}
+
+void loop()                            // Begin Main Program Loop
+
+{
+  while(mode == 1){
+    if(RedVal < RedVal1){              // If RedVal is less than desired RedVal1
+      RedVal ++;                       // increment RedVal
+    } else if(RedVal > RedVal1){       // If RedVal is more than desired RedVal1
+      RedVal --;                       // decrement RedVal
+    } else if(RedVal == RedVal1){      // If RedVal is equal to desired RedVal1
+      //Do Nothing 
+    }
+                                       // Repeated as above for BlueVal
+    if(BlueVal < BlueVal1){
+      BlueVal ++;
+    } else if(BlueVal > BlueVal1){
+      BlueVal --;
+    } else if(BlueVal == BlueVal1){
+      //Do Nothing
+    }
+                                       // Repeated as above for GreenVal
+    if(GreenVal < GreenVal1){
+      GreenVal ++;
+    } else if (GreenVal > GreenVal1){
+      GreenVal --;
+    } else if (GreenVal == GreenVal1){
+      // Do Nothing
+    }
+                                       // Now we have a new set of values, we write them to the PWM Pins.
+    analogWrite(Red, RedVal);
+    analogWrite(Green, GreenVal);
+    analogWrite(Blue, BlueVal);
+    delay(fade);                       // Implement a bit of delay to slow the change of colour down a bit
+
+    if(RedVal == RedVal1 && GreenVal == GreenVal1 && BlueVal == BlueVal1){ // If RedVal & GreenVal & BlueVal are all at the desired values
+      delay(1500);                     // Delay to hold this colour for a little while
+      mode = 2;                        // Change the mode to the next colour. Exiting this while loop and into the next one
+    }
+  }
+
+  while(mode == 2){
+    if(RedVal < RedVal2){
+      RedVal ++;                     
+    } else if(RedVal > RedVal2){
+      RedVal --;                     
+    } else if(RedVal == RedVal2){
+      //Do Nothing 
+    }
+
+    if(BlueVal < BlueVal2){
+      BlueVal ++;
+    } else if(BlueVal > BlueVal2){
+      BlueVal --;
+    } else if(BlueVal == BlueVal2){
+      //Do Nothing
+    }
+
+    if(GreenVal < GreenVal2){
+      GreenVal ++;
+    } else if (GreenVal > GreenVal2){
+      GreenVal --;
+    } else if (GreenVal == GreenVal2){
+      // Do Nothing
+    }
+
+    analogWrite(Red, RedVal);
+    analogWrite(Green, GreenVal);
+    analogWrite(Blue, BlueVal);
+    delay(fade);
+
+    if(RedVal == RedVal2 && GreenVal == GreenVal2 && BlueVal == BlueVal2){
+      delay(1500);
+      mode = 3;
+     //break;
+    }
+  }
+
+  while(mode == 3){
+    if(RedVal < RedVal3){
+      RedVal ++;
+    } else if(RedVal > RedVal3){
+      RedVal --;
+    } else if(RedVal == RedVal3){
+      //Do Nothing 
+    }
+
+    if(BlueVal < BlueVal3){
+      BlueVal ++;
+    } else if(BlueVal > BlueVal3){
+      BlueVal --;
+    } else if(BlueVal == BlueVal3){
+      //Do Nothing
+    }
+
+    if(GreenVal < GreenVal3){
+      GreenVal ++;
+    } else if (GreenVal > GreenVal3){
+      GreenVal --;
+    } else if (GreenVal == GreenVal3){
+      // Do Nothing
+    }
+
+    analogWrite(Red, RedVal);
+    analogWrite(Green, GreenVal);
+    analogWrite(Blue, BlueVal);
+    delay(fade);
+
+    if(RedVal == RedVal3 && GreenVal == GreenVal3 && BlueVal == BlueVal3){
+      delay(1500);
+      mode = 4;
+      //break;
+    }
+  }
+
+  while(mode == 4){
+    if(RedVal < RedVal4){
+      RedVal ++;
+    } else if(RedVal > RedVal4){
+      RedVal --;
+    } else if(RedVal == RedVal4){
+      //Do Nothing 
+    }
+
+    if(BlueVal < BlueVal4){
+      BlueVal ++;
+    } else if(BlueVal > BlueVal4){
+      BlueVal --;
+    } else if(BlueVal == BlueVal4){
+      //Do Nothing
+    }
+
+    if(GreenVal < GreenVal4){
+      GreenVal ++;
+    } else if (GreenVal > GreenVal4){
+      GreenVal --;
+    } else if (GreenVal == GreenVal4){
+      // Do Nothing
+    }
+
+    analogWrite(Red, RedVal);
+    analogWrite(Green, GreenVal);
+    analogWrite(Blue, BlueVal);
+    delay(fade);
+
+    if(RedVal == RedVal4 && GreenVal == GreenVal4 && BlueVal == BlueVal4){
+      delay(1500);
+      mode = 1;                                 // Set mode back to 1 to return to the original colour.
+      //break;
+    }
+  }
+
+}