lamp

int ledPins[] = {3, 5, 6 }; //Red Green Blue pins going out to the LED from the arduino
int proxPin = A0; //Proximity sensor - increases voltage as your hand gets closer - controls HUE
int potPin = A1; //potentiometer for brightness control

int maxVal = 500;
int minVal = 180;
int latestVal;
int previousVal;
int bottomRange = 180;

double bright;

void setup()
{
  Serial.begin(9600);

  pinMode(proxPin, INPUT);
  pinMode(potPin, INPUT);

  for (int i = 0; i < 3; i++)
    pinMode(ledPins[i], OUTPUT);
}

void loop()
{
  double tempBright = analogRead(potPin);
  bright = map(tempBright, 0, 1023, 0, 100) / 100.0; //0 to 1023 gets mapped to 0.00 to 1.00
  

  int aux = analogRead(proxPin);
  Serial.println(aux);
  if (aux > bottomRange) {
    latestVal = aux;
    delay(100);
  }
  if (latestVal > minVal) {
    minVal = latestVal;
    delay(100);
  }
  if (latestVal < maxVal) {
    maxVal = latestVal;
    delay(100);
  }
  int hueValue = map(latestVal, 180, 480, 0, 360); //Proximity sensor range (180 to 480) with a hand, mapped to 0 to 360 (hue)
  delay(100);

  setHueValue(hueValue);

}

void setHueValue(int hueValue)
{
  setColor(ledPins, hsvToRgb(hueValue, 1, 1));
}

void setColor(int* led, const byte* color)
{
  for (int i = 0; i < 3; i++)
    analogWrite( led[i],  color[i]);
}

byte rgb[3];

byte * hsvToRgb(int h, double s, double v)
{
  v = bright;
  // Make sure our arguments stay in-range
  h = max(0, min(360, h));
  s = max(0, min(1.0, s));
  v = max(0, min(1.0, v));
  if (s == 0)
  {
    // Achromatic (grey)
    rgb[0] = rgb[1] = rgb[2] = round(v * 255);
    return rgb;
  }
  double hs = h / 60.0; // sector 0 to 5
  int i = floor(hs);
  double f = hs - i; // factorial part of h
  double p = v * (1 - s);
  double q = v * (1 - s * f);
  double t = v * (1 - s * (1 - f));
  double r, g, b;
  switch (i)
  {
    case 0:
      r = v;
      g = t;
      b = p;
      break;
    case 1:
      r = q;
      g = v;
      b = p;
      break;
    case 2:
      r = p;
      g = v;
      b = t;
      break;
    case 3:
      r = p;
      g = q;
      b = v;
      break;
    case 4:
      r = t;
      g = p;
      b = v;
      break;
    default: // case 5:
      r = v;
      g = p;
      b = q;
  }
  rgb[0] = round(r * 255.0);
  rgb[1] = round(g * 255.0);
  rgb[2] = round(b * 255.0);
  return rgb;