RGB LED 10mm Module โมดูล LED RGB 3 สีขนาด 10mm

RGB LED 10mm Module โมดูล LED RGB 3 สีขนาด 10mm

โมดูลไฟ LED 3 สี RGB ขนาด 10mm สามารถเขียนโปรแกรมให้ผสมสีได้ทั้งหมด 256 ระดับ แสดงสีได้ 256x256x256 = 16 ล้าน shade

ตัวอย่างการใช้งาน  RGB LED 10mm Module โมดูล LED RGB 3 สีขนาด 10mm

• R -> 9
• G -> 10
• B -> 11
• V -> 5V

/*

        * Code for cross-fading 3 LEDs, red, green and blue (RGB) 

        * To create fades, you need to do two things: 

        * 1. Describe the colors you want to be displayed

        * 2. List the order you want them to fade in

        *

        * DESCRIBING A COLOR:

        * A color is just an array of three percentages, 0-100, 

        * controlling the red, green and blue LEDs

        *

        * Red is the red LED at full, blue and green off

        * int red = { 100, 0, 0 }

        * Dim white is all three LEDs at 30%

        * int dimWhite = {30, 30, 30}

        * etc.

        *

        * Some common colors are provided below, or make your own

        * 

        * LISTING THE ORDER:

        * In the main part of the program, you need to list the order 

        * you want to colors to appear in, e.g.

        * crossFade(red);

        * crossFade(green);

        * crossFade(blue);

        *

        * Those colors will appear in that order, fading out of 

        * one color and into the next 

        *

        * In addition, there are 5 optional settings you can adjust:

        * 1. The initial color is set to black (so the first color fades in), but 

        * you can set the initial color to be any other color

        * 2. The internal loop runs for 1020 interations; the 'wait' variable

        * sets the approximate duration of a single crossfade. In theory, 

        * a 'wait' of 10 ms should make a crossFade of ~10 seconds. In 

        * practice, the other functions the code is performing slow this 

        * down to ~11 seconds on my board. YMMV.

        * 3. If 'repeat' is set to 0, the program will loop indefinitely.

        * if it is set to a number, it will loop that number of times,

        * then stop on the last color in the sequence. (Set 'return' to 1, 

        * and make the last color black if you want it to fade out at the end.)

        * 4. There is an optional 'hold' variable, which pasues the 

        * program for 'hold' milliseconds when a color is complete, 

        * but before the next color starts.

        * 5. Set the DEBUG flag to 1 if you want debugging output to be

        * sent to the serial monitor.

        *

        * The internals of the program aren't complicated, but they

        * are a little fussy -- the inner workings are explained 

        * below the main loop.

        *

        * April 2007, Clay Shirky <clay.shirky@nyu.edu>

        */

// Output

int redPin = 9; // Red LED, connected to digital pin 9

int grnPin = 10; // Green LED, connected to digital pin 10

int bluPin = 11; // Blue LED, connected to digital pin 11

// Color arrays

int black[3] = { 0, 0, 0 };

int white[3] = { 100, 100, 100 };

int red[3] = { 100, 0, 0 };

int green[3] = { 0, 100, 0 };

int blue[3] = { 0, 0, 100 };

int yellow[3] = { 40, 95, 0 };

int dimWhite[3] = { 30, 30, 30 };

// etc.

// Set initial color

int redVal = black[0];

int grnVal = black[1];

int bluVal = black[2];

int wait = 10; // 10ms internal crossFade delay; increase for slower fades

int hold = 0; // Optional hold when a color is complete, before the next crossFade

int DEBUG = 1; // DEBUG counter; if set to 1, will write values back via serial

int loopCount = 60; // How often should DEBUG report?

int repeat = 3; // How many times should we loop before stopping? (0 for no stop)

int j = 0; // Loop counter for repeat

// Initialize color variables

int prevR = redVal;

int prevG = grnVal;

int prevB = bluVal;

// Set up the LED outputs

void setup()

{

pinMode(redPin, OUTPUT); // sets the pins as output

pinMode(grnPin, OUTPUT);

pinMode(bluPin, OUTPUT);

if (DEBUG) { // If we want to see values for debugging...

Serial.begin(9600); // ...set up the serial ouput 

}

}

// Main program: list the order of crossfades

void loop()

{

crossFade(red);

crossFade(green);

crossFade(blue);

crossFade(yellow);

if (repeat) { // Do we loop a finite number of times?

j += 1;

if (j >= repeat) { // Are we there yet?

exit(j); // If so, stop.

}

}

}

/* BELOW THIS LINE IS THE MATH -- YOU SHOULDN'T NEED TO CHANGE THIS FOR THE BASICS

        * 

        * The program works like this:

        * Imagine a crossfade that moves the red LED from 0-10, 

        * the green from 0-5, and the blue from 10 to 7, in

        * ten steps.

        * We'd want to count the 10 steps and increase or 

        * decrease color values in evenly stepped increments.

        * Imagine a + indicates raising a value by 1, and a -

        * equals lowering it. Our 10 step fade would look like:

        * 

        * 1 2 3 4 5 6 7 8 9 10

        * R + + + + + + + + + +

        * G + + + + +

        * B - - -

        * 

        * The red rises from 0 to 10 in ten steps, the green from 

        * 0-5 in 5 steps, and the blue falls from 10 to 7 in three steps.

        * 

        * In the real program, the color percentages are converted to 

        * 0-255 values, and there are 1020 steps (255*4).

        * 

        * To figure out how big a step there should be between one up- or

        * down-tick of one of the LED values, we call calculateStep(), 

        * which calculates the absolute gap between the start and end values, 

        * and then divides that gap by 1020 to determine the size of the step 

        * between adjustments in the value.

        */

int calculateStep(int prevValue, int endValue) {

int step = endValue - prevValue; // What's the overall gap?

if (step) { // If its non-zero, 

step = 1020/step; // divide by 1020

}

return step;

}

/* The next function is calculateVal. When the loop value, i,

        * reaches the step size appropriate for one of the

        * colors, it increases or decreases the value of that color by 1. 

        * (R, G, and B are each calculated separately.)

        */

int calculateVal(int step, int val, int i) {

if ((step) && i % step == 0) { // If step is non-zero and its time to change a value,

if (step > 0) { // increment the value if step is positive...

val += 1;

}

else if (step < 0) { // ...or decrement it if step is negative

val -= 1;

}

}

// Defensive driving: make sure val stays in the range 0-255

if (val > 255) {

val = 255;

}

else if (val < 0) {

val = 0;

}

return val;

}

/* crossFade() converts the percentage colors to a 

        * 0-255 range, then loops 1020 times, checking to see if 

        * the value needs to be updated each time, then writing

        * the color values to the correct pins.

        */

void crossFade(int color[3]) {

// Convert to 0-255

int R = (color[0] * 255) / 100;

int G = (color[1] * 255) / 100;

int B = (color[2] * 255) / 100;

int stepR = calculateStep(prevR, R);

int stepG = calculateStep(prevG, G);

int stepB = calculateStep(prevB, B);

for (int i = 0; i <= 1020; i++) {

redVal = calculateVal(stepR, redVal, i);

grnVal = calculateVal(stepG, grnVal, i);

bluVal = calculateVal(stepB, bluVal, i);

analogWrite(redPin, redVal); // Write current values to LED pins

analogWrite(grnPin, grnVal);

analogWrite(bluPin, bluVal);

delay(wait); // Pause for 'wait' milliseconds before resuming the loop

if (DEBUG) { // If we want serial output, print it at the 

if (i == 0 or i % loopCount == 0) { // beginning, and every loopCount times

Serial.print("Loop/RGB: #");

Serial.print(i);

Serial.print(" | ");

Serial.print(redVal);

Serial.print(" / ");

Serial.print(grnVal);

Serial.print(" / ");

Serial.println(bluVal);

}

DEBUG += 1;

}

}

// Update current values for next loop

prevR = redVal;

prevG = grnVal;

prevB = bluVal;

delay(hold); // Pause for optional 'wait' milliseconds before resuming the loop

}

ข้อมูลเพิ่มเติม RGB LED 10mm Module โมดูล LED RGB 3 สีขนาด 10mm

• http://learn.adafruit.com/adafruit-arduino-lesson-3-rgb-leds