Pot controlling LED colour scale

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1

Hello

I am having trouble getting the right colours out of my LED...

As can be seen in my code, I am trying to achieve greens to yellows to orange and then red.

My colours change at the right inputs but I get blues instead of greens AND this changes the oranges/yellows to a pink-ish colour.

I think it is just switch of green and blue reads but I haven't managed to work it out, any ideas?

Thank you

CODE:

int const potPin = A0;
int potVal;

const int redLEDpin = 11;
const int blueLEDpin = 10;
const int greenLEDpin = 9;

int redValue = 0;
int blueValue = 0;
int greenValue = 0;

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

pinMode(redLEDpin, OUTPUT);
pinMode(blueLEDpin, OUTPUT);
pinMode(greenLEDpin, OUTPUT);
}

void loop () {

potVal = analogRead(potPin);
Serial.print("potVal: ");
Serial.print(potVal);

if(potVal < 171) { //green
analogWrite(redLEDpin,0);
analogWrite(greenLEDpin,255);
analogWrite(blueLEDpin,0);
}

else if(potVal > 170 && potVal < 341) { //light green
analogWrite(redLEDpin,128);
analogWrite(greenLEDpin,255);
analogWrite(blueLEDpin,0);
}

else if(potVal > 340 && potVal < 512) { //yellow
analogWrite(redLEDpin,255);
analogWrite(greenLEDpin,255);
analogWrite(blueLEDpin,0);
}

else if(potVal > 511 && potVal < 682) { //orange
analogWrite(redLEDpin,255);
analogWrite(greenLEDpin,128);
analogWrite(blueLEDpin,0);
}

else if(potVal > 681 && potVal < 853) { //red
analogWrite(redLEDpin,255);
analogWrite(greenLEDpin,0);
analogWrite(blueLEDpin,0);
}

else if(potVal > 852) { //dark red
analogWrite(redLEDpin,128);
analogWrite(greenLEDpin,0);
analogWrite(blueLEDpin,0);
}

delay(15);
}

Funky Migelo.png
Funky Migelo.png1920×840 79.2 KB

2

In your hurry to post you didn't bother to learn what you need.
https://forum.arduino.cc/index.php?topic=148996.0

Could you take a few moments to READ THIS.
It will help you get the best out of the forum.

where READ THIS links to the first How to use this forum - please read. thread.

When you get to the part about 7. If you are posting code or error messages, use "code" tags, fix your first post and then finish reading the how-to.

When you learn about arrays, loops and functions you may see that your code could be less than half as long.

3

When I have problems like this, I write a much simpler test sketch. For example, light the LEDs individually in some predefined order. Then I can just look and verify which output maps to which colour. After that, if the colours are wrong, I know it's because of program logic, not the assignment of pins to LEDs or something like that.

4

My colours change at the right inputs but I get blues instead of greens AND this changes the oranges/yellows to a pink-ish colour.

Make sure that when you want only red, green or blue the right color shines.

Green with equal amounts of blue and red will be lighter green. Try 63 of each.

  else if(potVal > 170 && potVal < 341) { //light green
  analogWrite(redLEDpin,128);
  analogWrite(greenLEDpin,255);
  analogWrite(blueLEDpin,0);
  }

These ints should all be bytes and btw you never use the last 3, the compiler will optimize them out.

const int redLEDpin = 11;
const int blueLEDpin = 10;
const int greenLEDpin = 9;

int redValue = 0;
int blueValue = 0;
int greenValue = 0;

Can you read Serial and convert text numbers to store-in-a-byte binary?
If so then a sketch that takes 3 values in input and changes the led could let you test various combinations.

And from FastLED
http://fastled.io/docs/3.1/struct_c_r_g_b.html

The 0x###### values are 2 hex digits each Red, Green, Blue.
You can code hex numbers, they all start with 0x. Hexadecimal 0xFF == Decimal 255.

Their LightGreen = 0x90EE90, yours.to do the same...
analogWrite(redLEDpin,0x90);
analogWrite(greenLEDpin,0xEE);
analogWrite(blueLEDpin,0x90);

AliceBlue =0xF0F8FF, Amethyst =0x9966CC, AntiqueWhite =0xFAEBD7, Aqua =0x00FFFF,
Aquamarine =0x7FFFD4, Azure =0xF0FFFF, Beige =0xF5F5DC, Bisque =0xFFE4C4,
Black =0x000000, BlanchedAlmond =0xFFEBCD, Blue =0x0000FF, BlueViolet =0x8A2BE2,
Brown =0xA52A2A, BurlyWood =0xDEB887, CadetBlue =0x5F9EA0, Chartreuse =0x7FFF00,
Chocolate =0xD2691E, Coral =0xFF7F50, CornflowerBlue =0x6495ED, Cornsilk =0xFFF8DC,
Crimson =0xDC143C, Cyan =0x00FFFF, DarkBlue =0x00008B, DarkCyan =0x008B8B,
DarkGoldenrod =0xB8860B, DarkGray =0xA9A9A9, DarkGrey =0xA9A9A9, DarkGreen =0x006400,
DarkKhaki =0xBDB76B, DarkMagenta =0x8B008B, DarkOliveGreen =0x556B2F, DarkOrange =0xFF8C00,
DarkOrchid =0x9932CC, DarkRed =0x8B0000, DarkSalmon =0xE9967A, DarkSeaGreen =0x8FBC8F,
DarkSlateBlue =0x483D8B, DarkSlateGray =0x2F4F4F, DarkSlateGrey =0x2F4F4F, DarkTurquoise =0x00CED1,
DarkViolet =0x9400D3, DeepPink =0xFF1493, DeepSkyBlue =0x00BFFF, DimGray =0x696969,
DimGrey =0x696969, DodgerBlue =0x1E90FF, FireBrick =0xB22222, FloralWhite =0xFFFAF0,
ForestGreen =0x228B22, Fuchsia =0xFF00FF, Gainsboro =0xDCDCDC, GhostWhite =0xF8F8FF,
Gold =0xFFD700, Goldenrod =0xDAA520, Gray =0x808080, Grey =0x808080,
Green =0x008000, GreenYellow =0xADFF2F, Honeydew =0xF0FFF0, HotPink =0xFF69B4,
IndianRed =0xCD5C5C, Indigo =0x4B0082, Ivory =0xFFFFF0, Khaki =0xF0E68C,
Lavender =0xE6E6FA, LavenderBlush =0xFFF0F5, LawnGreen =0x7CFC00, LemonChiffon =0xFFFACD,
LightBlue =0xADD8E6, LightCoral =0xF08080, LightCyan =0xE0FFFF, LightGoldenrodYellow =0xFAFAD2,
LightGreen =0x90EE90, LightGrey =0xD3D3D3, LightPink =0xFFB6C1, LightSalmon =0xFFA07A,
LightSeaGreen =0x20B2AA, LightSkyBlue =0x87CEFA, LightSlateGray =0x778899, LightSlateGrey =0x778899,
LightSteelBlue =0xB0C4DE, LightYellow =0xFFFFE0, Lime =0x00FF00, LimeGreen =0x32CD32,
Linen =0xFAF0E6, Magenta =0xFF00FF, Maroon =0x800000, MediumAquamarine =0x66CDAA,
MediumBlue =0x0000CD, MediumOrchid =0xBA55D3, MediumPurple =0x9370DB, MediumSeaGreen =0x3CB371,
MediumSlateBlue =0x7B68EE, MediumSpringGreen =0x00FA9A, MediumTurquoise =0x48D1CC, MediumVioletRed =0xC71585,
MidnightBlue =0x191970, MintCream =0xF5FFFA, MistyRose =0xFFE4E1, Moccasin =0xFFE4B5,
NavajoWhite =0xFFDEAD, Navy =0x000080, OldLace =0xFDF5E6, Olive =0x808000,
OliveDrab =0x6B8E23, Orange =0xFFA500, OrangeRed =0xFF4500, Orchid =0xDA70D6,
PaleGoldenrod =0xEEE8AA, PaleGreen =0x98FB98, PaleTurquoise =0xAFEEEE, PaleVioletRed =0xDB7093,
PapayaWhip =0xFFEFD5, PeachPuff =0xFFDAB9, Peru =0xCD853F, Pink =0xFFC0CB,
Plaid =0xCC5533, Plum =0xDDA0DD, PowderBlue =0xB0E0E6, Purple =0x800080,
Red =0xFF0000, RosyBrown =0xBC8F8F, RoyalBlue =0x4169E1, SaddleBrown =0x8B4513,
Salmon =0xFA8072, SandyBrown =0xF4A460, SeaGreen =0x2E8B57, Seashell =0xFFF5EE,
Sienna =0xA0522D, Silver =0xC0C0C0, SkyBlue =0x87CEEB, SlateBlue =0x6A5ACD,
SlateGray =0x708090, SlateGrey =0x708090, Snow =0xFFFAFA, SpringGreen =0x00FF7F,
SteelBlue =0x4682B4, Tan =0xD2B48C, Teal =0x008080, Thistle =0xD8BFD8,
Tomato =0xFF6347, Turquoise =0x40E0D0, Violet =0xEE82EE, Wheat =0xF5DEB3,
White =0xFFFFFF, WhiteSmoke =0xF5F5F5, Yellow =0xFFFF00, YellowGreen =0x9ACD32,
FairyLight =0xFFE42D, FairyLightNCC =0xFF9D2A

I expect that you might get some new ideas real soon.