Any formula/library/code for Temperature to LED color

Development Boards Arduino
1

Has anyone developed any algorithm for generating RGB based on temperature:

  • Blue = Cold (say… 24 deg)

    Green = maybe 30 deg?

    Yellow = 40 deg

    Orange = 50 deg

    Red = Hot 65+ deg



    • And shades in between?

    Someone has to have developed a nice formula.

    2

    DIY

    3

    Hi. You posted the same question on Arduino forum and got a couple of replies, including one from me:

      int temp;
  byte red, green, blue;

  temp = constrain(temp, 24, 65);
  if (temp > 30) {
    red = map(temp, 30, 65, 0, 255);
    green = 255 - red;
    blue = 0;
  }
  else {
    red = 0;
    green = map(temp, 24, 30, 0, 255);
    blue = 255 - green;
  }

    Paul