4 Neopixel Sine Wave Animation | Arduino Tutorial

Circuit Diagram

Code of this project

#include <Adafruit_NeoPixel.h> //Basic sine wave animation for NeoPixel Ring Bangle Bracelet //by Dano Wall and Becky Stern for Adafruit Industries #define PIN 3 #define NUM_LEDS 64 // Parameter 1 = number of pixels in strip // Parameter 2 = pin number (most are valid) // Parameter 3 = pixel type: // NEO_GRB Pixels are wired for GRB bitstream (most NeoPixel products) // NEO_RGB Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2) Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_GRB); uint32_t color = strip.Color(250, 14, 14); // Change RGB color value here // These are the pixels in order of animation-- 36 pixels in total: int sine[] = { 4, 3, 2, 1, 0, 15, 14, 13, 12, 20, 21, 22, 23, 24, 25, 26, 27, 28, 36, 35, 34, 33, 32, 47, 46, 45, 44, 52, 53, 54, 55, 56, 57, 58, 59, 60 }; void setup() { strip.begin(); strip.show(); // Initialize all pixels to 'off' strip.setBrightness(180); // 40/255 brightness (about 15%) } void loop() { for(int i=0; i<36; i++) { strip.setPixelColor(sine[i], color); // Draw 'head' pixel strip.setPixelColor(sine[(i + 36 - 8) % 36], 0); // Erase 'tail' strip.show(); delay(40); } }