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WS2812 RGB12燈燈環模組


使用「科易KEYES Arduino UNO R3 開發板」連接「WS2812 RGB12燈燈環模組」, 在WS2812 RGB12燈燈環模組上顯示燈環的顏色。
WS2812 RGB12燈燈環模組包含於「洞洞兩教學材料包 Education Kit 002」內。

KEYES Arduino UNO R3電路圖

  • 通用型彩色Sensor shield v5.0感測器擴充板
  • WS2812 RGB12燈燈環模組
WS2812 RGB12燈燈環模組數位訊號輸出, 可以接「D0 ~ D13」的 KEYES Arduino UNO R3訊號端上。 本範例連接到「D3

Arduino 程式

由於WS2812 RGB12燈燈環模組是函式庫型模組,所以需要先在Arduino上下載函式庫,下載方法如下。
在Arduino上選擇工具,選擇管理程式庫,在管理程式庫搜尋Adafruit NeoPixel選擇Adafruit NeoPixel by Adafruit版本1.2.5並安裝。
在WS2812 RGB12燈燈環模組上顯示依序點亮綠色的燈,每0.5秒依序開啟各個LED燈。pixels.setPixelColor(i, pixels.Color(0, 150, 0));裡面的數值分別代表RGB顏色的數值,數值範圍為0-255,可以依據自己想亮燈的顏色去改變數值。
產生出的 Arduino 程式如下
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
// Which pin on the Arduino is connected to the NeoPixels?
#define PIN 3 // On Trinket or Gemma, suggest changing this to 1
// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS 12 // Popular NeoPixel ring size
// When setting up the NeoPixel library, we tell it how many pixels,
// and which pin to use to send signals. Note that for older NeoPixel
// strips you might need to change the third parameter -- see the
// strandtest example for more information on possible values.
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
#define DELAYVAL 500 // Time (in milliseconds) to pause between pixels
void setup() {
// These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
// Any other board, you can remove this part (but no harm leaving it):
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
// END of Trinket-specific code.
pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
void loop() {
pixels.clear(); // Set all pixel colors to 'off'
// The first NeoPixel in a strand is #0, second is 1, all the way up
// to the count of pixels minus one.
for(int i=0; i<NUMPIXELS; i++) { // For each pixel...
// pixels.Color() takes RGB values, from 0,0,0 up to 255,255,255
// Here we're using a moderately bright green color:
pixels.setPixelColor(i, pixels.Color(0, 150, 0));
pixels.show(); // Send the updated pixel colors to the hardware.
delay(DELAYVAL); // Pause before next pass through loop