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In this video I provide few tipes for working with individually addresable leds like ws2812. I would use Arduino with fastled library.I will compare the use of RGB and HSV color models.I hope you would find it useful
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#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <FastLED.h>
int Red;
int Green;
int Blue;
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET -1// Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
#define NUM_LEDS 64
#define DATA_PIN 13
CRGB leds[NUM_LEDS];
void setup() {
FastLED.addLeds<WS2812,DATA_PIN,GRB>(leds,NUM_LEDS);
FastLED.setBrightness(5);
if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
Serial.println(F("SSD1306 allocation failed"));
for(;;); // Don't proceed, loop forever
}
display.display();
delay(2000);
display.clearDisplay();
display.display();
display.fillRect(0,0,63,16,SSD1306_WHITE);
display.fillRect(65,0,63,16,SSD1306_WHITE);
display.setTextSize(2);
display.setTextColor(SSD1306_BLACK);
display.setCursor(15,1);
display.println("RGB");
display.setCursor(80,1);
display.println("HSV");
display.fillRect(0,15,63,16,SSD1306_WHITE);
display.fillRect(0,32,63,16,SSD1306_WHITE);
display.fillRect(0,49,63,16,SSD1306_WHITE);
display.setCursor(5,17);
display.println("R:");
display.setCursor(5,33);
display.println("G:");
display.setCursor(5,50);
display.println("B:");
display.display();
}
void loop() {
//reading the composite color values from the 3 potentiometers
Red= map(analogRead(A2),0,1023,0,275 );
Green= map(analogRead(A1),0,1023,0,275 );
Blue= map(analogRead(A0),0,1023,0,275 );
//displaying read values on OLED display
display.fillRect(0,15,63,16,SSD1306_WHITE);
display.fillRect(0,32,63,16,SSD1306_WHITE);
display.fillRect(0,49,63,16,SSD1306_WHITE);
display.setCursor(5,17);
display.print("R:");
display.print(Red);
display.setCursor(5,33);
display.print("G:");
display.print(Green);
display.setCursor(5,50);
display.print("B:");
display.print(Blue);
display.display();
// setting all 64 led to the color made of selected R G B values
for (int i=0;i<64;i++) {
leds[i]=CRGB(Red,Green,Blue);
}
// redisplaing all leds
FastLED.show();
}
Setting one half of the matrix to the RGB color and the other half to HSV color
ArduinoRGB color is selected with 3 potentiometers
HSV color is selected with 1 potentiometer
HSV color is selected with 1 potentiometer
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <FastLED.h>
int Red;
int Green;
int Blue;
int C_HSV;
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET -1// Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
uint16_t Colors [27]{0x7FFF00,0x6495ED,0xDC143,0x00008B,0x8B008B,
0xFF8C00,0x00CED1,0x9400D3,0xFF1493,0x228B22,
0xFFD700,0xADFF2F,0x7CFC00,0x87CEFA,0x00FF00,
0xFF00FF,0x0000CD,0xFFA500,0x9ACD32,0xFFE4C4,
0x00FFFF,0x008B8B,0xE9967A,0xFFFACD,0xADD8E6,
0xFAFAD2,0xFFEFD5};
#define NUM_LEDS 64
#define DATA_PIN 13
CRGB leds[NUM_LEDS];
void setup() {
FastLED.addLeds<WS2812,DATA_PIN,RGB>(leds,NUM_LEDS);
FastLED.setBrightness(5);
if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
Serial.println(F("SSD1306 allocation failed"));
for(;;); // Don't proceed, loop forever
}
display.display();
delay(2000);
display.clearDisplay();
display.display();
display.fillRect(0,0,63,16,SSD1306_WHITE);
display.fillRect(65,0,63,16,SSD1306_WHITE);
display.setTextSize(2);
display.setTextColor(SSD1306_BLACK);
display.setCursor(15,1);
display.println("RGB");
display.setCursor(80,1);
display.println("HSV");
display.fillRect(0,15,63,16,SSD1306_WHITE);
display.fillRect(0,32,63,16,SSD1306_WHITE);
display.fillRect(0,49,63,16,SSD1306_WHITE);
display.setCursor(5,17);
display.println("R:");
display.setCursor(5,33);
display.println("G:");
display.setCursor(5,50);
display.println("B:");
display.fillRect(80,15,63,16,SSD1306_WHITE);
display.setCursor(95,17);
display.println("Hue:");
display.display();
}
void loop() {
// reading RGB composite color values from 3 potentiometers
Red= map(analogRead(A2),0,1023,0,260 );
Green= map(analogRead(A1),0,1023,0,260 );
Blue= map(analogRead(A0),0,1023,0,260 );
// reading HSV color value from the potentiometer
C_HSV= map(analogRead(A3),0,1023,0,260 );
// Displaying selected RGB and HSV color values on oled display
display.fillRect(0,15,63,16,SSD1306_WHITE);
display.fillRect(0,32,63,16,SSD1306_WHITE);
display.fillRect(0,49,63,16,SSD1306_WHITE);
display.setCursor(5,17);
display.print("R:");
display.print(Red);
display.setCursor(5,33);
display.print("G:");
display.print(Green);
display.setCursor(5,50);
display.print("B:");
display.print(Blue);
display.fillRect(65,15,63,16,SSD1306_WHITE);
display.setCursor(67,17);
display.print("H:");
display.print(C_HSV);
display.display();
// Setting LEDs in first 4 columns to selected RGB color
// Setting leds in columns 5-8 to selected HSV color
for (int i=0;i<8;i++) {
//leds[i]=CRGB(Red,Green,Blue);
leds[8*i+5]=CRGB(Red,Green,Blue);
leds[8*i+6]=CRGB(Red,Green,Blue);
leds[8*i+7]=CRGB(Red,Green,Blue);
leds[8*i]=CHSV( C_HSV, 255, 255);
leds[8*i+1]=CHSV( C_HSV, 255, 255);
leds[8*i+2]=CHSV( C_HSV, 255, 255);
}
// Redisplaying all leds
FastLED.show();
}
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