Neopixel Ring 24-LED(WS2812)

Neopixel is an LED product from Adafruit that has a WS281x chip built-in.

It comes in various shapes like single, circular, and linear, making it convenient for different applications, with the advantage of easy wiring.

It is commonly used with microcontrollers like Arduino.

Specifications

• Operating Voltage: 5V
• Current per LED: 20mA to 80mA

Example Hardware

• Arduino Board
• 24-bit Neopixel

Connection

This component does not come with pre-attached wires, so you need to solder jumper wires before proceeding.

Arduino	neo pixel
5V	5V
GND	GND
D7	DI

Library

Adafruit Neopixel library is used.

Please refer to the Arduino library documentation for how to use the library.

Example Code

This example sequentially lights up 7 colors.

#include <Adafruit_NeoPixel.h>

#define PIN 7
#define NUMPIXELS 24
#define bright 255
#define dly 50
Adafruit_NeoPixel neo(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  neo.begin();
  neo.setBrightness(bright);
  neo.clear();
  neo.show();
  for (int i = 0; i < NUMPIXELS; i++) {
    neo.setPixelColor(i, 255, 255, 255);
    neo.show();
    delay(dly);
  }
  for (int i = 0; i < NUMPIXELS; i++) {
    neo.setPixelColor(i, 255, 0, 0);
    neo.show();
    delay(dly);
  }
  for (int i = 0; i < NUMPIXELS; i++) {
    neo.setPixelColor(i, 0, 255, 0);
    neo.show();
    delay(dly);
  }
  for (int i = 0; i < NUMPIXELS; i++) {
    neo.setPixelColor(i, 0, 0, 255);
    neo.show();
    delay(dly);
  }
  for (int i = 0; i < NUMPIXELS; i++) {
    neo.setPixelColor(i, 255, 255, 0);
    neo.show();
    delay(dly);
  }
  for (int i = 0; i < NUMPIXELS; i++) {
    neo.setPixelColor(i, 0, 255, 255);
    neo.show();
    delay(dly);
  }
  for (int i = 0; i < NUMPIXELS; i++) {
    neo.setPixelColor(i, 255, 0, 255);
    neo.show();
    delay(dly);
  }
  for (int i = 0; i < NUMPIXELS; i++) {
    neo.setPixelColor(i, 0, 0, 0);
  }
  neo.show();
}

void loop() {
}