彩色LED模块

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产品简介

彩色LED模块采用4颗 WS2812（RGB全彩高亮LED）制作完成。WS2812是一个集控制电路与发光电路于一体的智能外控LED光源

规格参数

• 供电电压：DC4～30V
• 灵敏度：10mV/℃
• 精度：0.5℃ （在+25℃时）
• 测量温度范围：0℃ ～ 100℃
• 安装孔径：3MM
• 模块尺寸：28*21*1.6MM (长*宽*高)
• 孔间距：15MM
• 模块重量：2.2g

引脚说明

• 1. G -- Gnd(地)
• 2. V -- Vcc(电源+5V)
• 3. S -- Sign(信号)

应用示例

电路连接示意图

示例代码

#include <Adafruit_NeoPixel.h>

#define Red Color(255,0,0)
#define Green Color(0,255,0)
#define Blue Color(0,0,255)

#define PIN            5
#define NUMPIXELS      4

// Parameter 1 = number of pixels in strip
// Parameter 2 = pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   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 pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

int delayval = 500; // delay for half a second

void setup() {
  // This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
#if defined (__AVR_ATtiny85__)
  if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
#endif
  // End of trinket special code

  pixels.begin(); // This initializes the NeoPixel library.
  pixels.show();
}

void loop() {
  lightLED(pixels.Red);          //Order lit the red light
  lightLED(pixels.Green);        //Order lit the green light
  lightLED(pixels.Blue);         //Order lit the blue light
}

void lightLED(uint32_t c) {
  // For a set of NeoPixels the first NeoPixel is 0, second is 1, all the way up to the count of pixels minus one.
  for (int i = 0; i < NUMPIXELS; i++) {
    // pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
    pixels.setPixelColor(i, c); // Moderately bright green color.
    pixels.show(); // This sends the updated pixel color to the hardware.
    delay(delayval); // Delay for a period of time (in milliseconds).
  }
}

程序下载地址：simpleExample_ColorLED

程序演示效果地址：点亮LED

参考资料

• WS2812说明书-英文
• WS2812说明书-中文
• 规格表合集 - 5050LED/WS2801/WS2811/WS2812 下载：LED_Specification_sheets
• Arduino-WS2812库-FastLED
• Arduino-WS2812库-FastLED

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