Weekend Project: Under-Desk Lighting

// Scott Clandinin - 2017


#define REDPIN 5
#define GREENPIN 3
#define BLUEPIN 6
 
void setup() 
{
  pinMode(REDPIN, OUTPUT);
  pinMode(GREENPIN, OUTPUT);
  pinMode(BLUEPIN, OUTPUT);

  randomSeed(analogRead(0));  //set random seed off floating pin A0
  
  analogWrite(BLUEPIN, 255);
  delay(1000);
} 
 
void loop() 
{

  int routine;

  routine1();
//  routine = random(1,4);
//
//  switch(routine)
//  {
//    case 1:
//      routine1();
//      break;
//  
//    case 2:
//      routine2();
//      break;
//  
//    case 3:
//      routine3();
//      break;   
//      
//    case 4:
//      routine4();
//      break;   
//  }
  
 
 
}




//******************************************************
//                    fading colours
//******************************************************
void routine1()
{
  int r, g, b; 
  int FADESPEED = 10;     // make this higher to slow down
  
 // fade from blue to violet
  for (r = 0; r < 255; r++) 
  { 
    analogWrite(REDPIN, r);
    delay(FADESPEED);
  } 
  // fade from violet to red
  for  (b = 255; b > 0; b--)
  { 
    analogWrite(BLUEPIN, b);
    delay(FADESPEED);
  } 
  // fade from red to yellow
  for (g = 0; g < 255; g++) 
  { 
    analogWrite(GREENPIN, g);
    delay(FADESPEED);
  } 
  // fade from yellow to green
  for (r = 255; r > 0; r--) 
  { 
    analogWrite(REDPIN, r);
    delay(FADESPEED);
  } 
  // fade from green to teal
  for (b = 0; b < 255; b++) 
  { 
    analogWrite(BLUEPIN, b);
    delay(FADESPEED);
  }
  // fade from teal to blue
  for (g = 255; g > 0; g--) 
  { 
    analogWrite(GREENPIN, g);
    delay(FADESPEED);
  }     
  
}


//******************************************************
//                    changing colours
//******************************************************
void routine2()
{
  int r, g, b; 
  
  
  analogWrite(REDPIN, 255);     //RED
  analogWrite(GREENPIN, 0);
  analogWrite(BLUEPIN, 0);
  delay(1000);
  
  analogWrite(REDPIN, 200);     //yellow
  analogWrite(GREENPIN, 255);
  analogWrite(BLUEPIN, 0);
  delay(1000);

  analogWrite(REDPIN, 255);     //orange
  analogWrite(GREENPIN, 255);
  analogWrite(BLUEPIN, 0);
  delay(1000);

  analogWrite(REDPIN, 0);     //green
  analogWrite(GREENPIN, 255);
  analogWrite(BLUEPIN, 0);
  delay(1000);
  
  analogWrite(REDPIN, 25);     //teal
  analogWrite(GREENPIN, 255);
  analogWrite(BLUEPIN, 255);
  delay(1000);
  
  analogWrite(REDPIN, 0);     //blue
  analogWrite(GREENPIN, 0);
  analogWrite(BLUEPIN, 255);
  delay(1000);
  
  analogWrite(REDPIN, 255);     //purple
  analogWrite(GREENPIN, 0);
  analogWrite(BLUEPIN, 255);
  delay(1000);

  analogWrite(REDPIN, 255);     //pink
  analogWrite(GREENPIN, 50);
  analogWrite(BLUEPIN, 50);
  delay(1000);
  
}


//******************************************************
//                    fading blue
//******************************************************
void routine3()
{
  int r, g, b; 
  int FADESPEED = 20;      // make this higher to slow down

  // fade to blue
  for  (b = 0; b < 255; b++)
  { 
    analogWrite(BLUEPIN, b);
    delay(FADESPEED);
  } 

  // fade out blue
  for  (b = 255; b > 0; b--)
  { 
    analogWrite(BLUEPIN, b);
    delay(FADESPEED);
  } 
}


//******************************************************
//                    strobe purple
//******************************************************
void routine4()
{  

  analogWrite(REDPIN, 255);     //purple
  analogWrite(GREENPIN, 0);
  analogWrite(BLUEPIN, 255);
  delay(100);

  analogWrite(REDPIN, 0);     //off
  analogWrite(GREENPIN, 0);
  analogWrite(BLUEPIN, 0);
  delay(100);
}