The Arduino Project

// include the library code:

#include <LiquidCrystal.h>

#include <Wire.h>

#define REDLITE 3

#define GREENLITE 5

#define BLUELITE 6

// initialize the library with the numbers of the interface pins

LiquidCrystal lcd(7, 8, 9, 10, 11, 12);

// you can change the overall brightness by range 0 -> 255

int brightness = 255;

void setup() {

// set up the LCD's number of rows and columns:

lcd.begin(16, 2);

// Print a message to the LCD.

lcd.print("RGB 16x2 Display ");

lcd.setCursor(0,1);

lcd.print(" Multicolor LCD ");

pinMode(REDLITE, OUTPUT);

pinMode(GREENLITE, OUTPUT);

pinMode(BLUELITE, OUTPUT);

brightness = 100;

}

void loop() {

for (int i = 0; i < 255; i++) {

setBacklight(i, 0, 255-i);

delay(5);

}

for (int i = 0; i < 255; i++) {

setBacklight(255-i, i, 0);

delay(5);

}

for (int i = 0; i < 255; i++) {

setBacklight(0, 255-i, i);

delay(5);

}

}

void setBacklight(uint8_t r, uint8_t g, uint8_t b) {

// normalize the red LED - its brighter than the rest!

r = map(r, 0, 255, 0, 100);

g = map(g, 0, 255, 0, 150);

r = map(r, 0, 255, 0, brightness);

g = map(g, 0, 255, 0, brightness);

b = map(b, 0, 255, 0, brightness);

// common anode so invert!

r = map(r, 0, 255, 255, 0);

g = map(g, 0, 255, 255, 0);

b = map(b, 0, 255, 255, 0);

Serial.print("R = "); Serial.print(r, DEC);

Serial.print(" G = "); Serial.print(g, DEC);

Serial.print(" B = "); Serial.println(b, DEC);

analogWrite(REDLITE, r);

analogWrite(GREENLITE, g);

analogWrite(BLUELITE, b);

}