LED strip ws2812b

Introduction

300 LEDs, 5m,

Each part of the RGB ledd will use at maximum 20mA which gives us 3x20mA = 60mA per pixel. The USB plugged into a computer can provide 500mA of power, and Arduino can supply about 200 mA. If powered by USB, there is a 500mA PTC fuse in line from 5V from the PC.

Take 8 LED in a row: max 8x60 mA = 480 mA.

Programming

Simple code using FastLED package:

#include <FastLED.h>

#define NUM_LEDS 3
#define LED_PIN 5

CRGB leds[NUM_LEDS];

void setup () {
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(50);
  delay(2000);
}


void loop () {
  for (int i=0; i<NUM_LEDS; i++){
    leds[i] = CRGB::Red;
    FastLED.show();
    delay(500);
    leds[i] = CRGB::Green;
    FastLED.show();
    delay(500);

    leds[i] = CRGB::Black;
    FastLED.show();
 }
}