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Grove – Chainable RGB LED 全彩 RGB 可串接式 LED 模組 seeed原廠
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Grove – Chainable RGB LED是基於P9813全彩LED驅動晶片的RGB LED模塊。它支持串接，最多可同時串接1024個同類模組。
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商品說明
Grove – Chainable RGB LED 全彩 RGB 可串接式 LED 模組
Grove – Chainable RGB LED是基於P9813全彩LED驅動晶片的RGB LED模塊。它支持串接，最多可同時串接1024個同類模組。
規格參數
- 工作電壓: 5V
- 工作電流: 20mA
- 通信協議: 串口
應用示例
接下來我們展示這樣一個Demo:多個RGB燈的顏色統一漸變。硬件連接圖: Picture
完成這個Demo,你需要一個或者多個Grove – Chainable RGB LED。注意在級聯RGB模塊時， Grove – Chainable RGB LED的IN接口連接到Grove – Base Shield的D7/D8管腳。它的OUT接口要連接到另一個RGB的IN接口，按照這種方式級聯更多的Grove – Chainable RGB LED模塊。
- 下載Chainable LED庫文件並安裝到Arduino的Library路徑下。在wiki首頁有一篇關於如何安裝庫文件的課程供參考。
- 通過路徑:File->Examples->CnainableLED_master 打開例程：CycleThroughColors並上傳，你就可以觀察到Demo效果。
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/* * Example of using the ChainableRGB library for controlling a Grove RGB. * This code cycles through all the colors in an uniform way. This is accomplished using a HSB color space. */ #include <ChainableLED.h> #define NUM_LEDS 5 ChainableLED leds(7, 8, NUM_LEDS); void setup() { } float hue = 0.0; boolean up = true; void loop() { for (byte i=0; i<NUM_LEDS; i++) leds.setColorHSB(i, hue, 1.0, 0.5); delay(50); if (up) hue+= 0.025; else hue-= 0.025; if (hue>=1.0 && up) up = false; else if (hue<=0.0 && !up) up = true; } |
擴展應用： 基於可鍊式LED庫，我們設計了這個演示：RGB顏色隨Grove測量的溫度而變化 – 溫度。當溫度為25到32時，RGB顏色從綠色變為紅色。測試代碼如下所示。如果您對此感興趣，請這樣做。
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<span class="c1">// demo of temperature -> rgbLED</span> <span class="c1">// temperature form 25 - 32, rgbLed from green -> red</span> <span class="c1">// Grove-temperature plu to A0</span> <span class="c1">// LED plug to D7,D8</span> <span class="cp">#include</span> <span class="cpf"><Streaming.h></span> <span class="cp">#include</span> <span class="cpf"><ChainableLED.h></span> <span class="cp">#define TEMPUP 32</span> <span class="cp">#define TEMPDOWN 25</span> <span class="n">ChainableLED</span> <span class="nf">leds</span><span class="p">(</span><span class="mi">7</span><span class="p">,</span> <span class="mi">8</span><span class="p">,</span> <span class="mi">1</span><span class="p">);</span> <span class="c1">// connect to pin7 and pin8 , one led</span> <span class="kt">int</span> <span class="nf">getAnalog</span><span class="p">()</span> <span class="c1">// get value from A0</span> <span class="p">{</span> <span class="kt">int</span> <span class="n">sum</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="k">for</span><span class="p">(</span><span class="kt">int</span> <span class="n">i</span><span class="o">=</span><span class="mi">0</span><span class="p">;</span> <span class="n">i</span><span class="o"><</span><span class="mi">32</span><span class="p">;</span> <span class="n">i</span><span class="o">++</span><span class="p">)</span> <span class="p">{</span> <span class="n">sum</span> <span class="o">+=</span> <span class="n">analogRead</span><span class="p">(</span><span class="n">A0</span><span class="p">);</span> <span class="p">}</span> <span class="k">return</span> <span class="n">sum</span><span class="o">>></span><span class="mi">5</span><span class="p">;</span> <span class="p">}</span> <span class="kt">float</span> <span class="nf">getTemp</span><span class="p">()</span> <span class="c1">// get temperature</span> <span class="p">{</span> <span class="kt">float</span> <span class="n">temperature</span> <span class="o">=</span> <span class="mf">0.0</span><span class="p">;</span> <span class="kt">float</span> <span class="n">resistance</span> <span class="o">=</span> <span class="mf">0.0</span><span class="p">;</span> <span class="kt">int</span> <span class="n">B</span> <span class="o">=</span> <span class="mi">3975</span><span class="p">;</span> <span class="c1">//B value of the thermistor</span> <span class="kt">int</span> <span class="n">a</span> <span class="o">=</span> <span class="n">getAnalog</span><span class="p">();</span> <span class="n">resistance</span> <span class="o">=</span> <span class="p">(</span><span class="kt">float</span><span class="p">)(</span><span class="mi">1023</span><span class="o">-</span><span class="n">a</span><span class="p">)</span><span class="o">*</span><span class="mi">10000</span><span class="o">/</span><span class="n">a</span><span class="p">;</span> <span class="c1">//get the resistance of the sensor;</span> <span class="n">temperature</span> <span class="o">=</span> <span class="mi">1</span><span class="o">/</span><span class="p">(</span><span class="n">log</span><span class="p">(</span><span class="n">resistance</span><span class="o">/</span><span class="mi">10000</span><span class="p">)</span><span class="o">/</span><span class="n">B</span><span class="o">+</span><span class="mi">1</span><span class="o">/</span><span class="mf">298.15</span><span class="p">)</span><span class="o">-</span><span class="mf">273.15</span><span class="p">;</span> <span class="c1">//convert to temperature via datasheet ;</span> <span class="k">return</span> <span class="n">temperature</span><span class="p">;</span> <span class="p">}</span> <span class="kt">void</span> <span class="nf">ledLight</span><span class="p">(</span><span class="kt">int</span> <span class="n">dta</span><span class="p">)</span> <span class="c1">// light led</span> <span class="p">{</span> <span class="n">dta</span> <span class="o">=</span> <span class="n">dta</span><span class="o">/</span><span class="mi">4</span><span class="p">;</span> <span class="c1">// 0 - 255</span> <span class="kt">int</span> <span class="n">colorR</span> <span class="o">=</span> <span class="n">dta</span><span class="p">;</span> <span class="kt">int</span> <span class="n">colorG</span> <span class="o">=</span> <span class="mi">255</span><span class="o">-</span><span class="n">dta</span><span class="p">;</span> <span class="kt">int</span> <span class="n">colorB</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="n">leds</span><span class="p">.</span><span class="n">setColorRGB</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="n">colorR</span><span class="p">,</span> <span class="n">colorG</span><span class="p">,</span> <span class="n">colorB</span><span class="p">);</span> <span class="p">}</span> <span class="kt">void</span> <span class="nf">setup</span><span class="p">()</span> <span class="p">{</span> <span class="n">Serial</span><span class="p">.</span><span class="n">begin</span><span class="p">(</span><span class="mi">38400</span><span class="p">);</span> <span class="n">cout</span> <span class="o"><<</span> <span class="s">"hello world !"</span> <span class="o"><<</span> <span class="n">endl</span><span class="p">;</span> <span class="p">}</span> <span class="kt">void</span> <span class="nf">loop</span><span class="p">()</span> <span class="p">{</span> <span class="kt">float</span> <span class="n">temp</span> <span class="o">=</span> <span class="n">getTemp</span><span class="p">();</span> <span class="kt">int</span> <span class="n">nTemp</span> <span class="o">=</span> <span class="n">temp</span><span class="o">*</span><span class="mi">100</span><span class="p">;</span> <span class="n">nTemp</span> <span class="o">=</span> <span class="n">nTemp</span> <span class="o">></span> <span class="n">TEMPUP</span><span class="o">*</span><span class="mi">100</span><span class="err"> </span><span class="o">?</span> <span class="n">TEMPUP</span><span class="o">*</span><span class="mi">100</span><span class="err"> </span><span class="o">:</span> <span class="p">(</span><span class="n">nTemp</span> <span class="o"><</span> <span class="n">TEMPDOWN</span><span class="o">*</span><span class="mi">100</span><span class="err"> </span><span class="o">?</span> <span class="n">TEMPDOWN</span><span class="o">*</span><span class="mi">100</span><span class="err"> </span><span class="o">:</span> <span class="n">nTemp</span><span class="p">);</span> <span class="n">nTemp</span> <span class="o">=</span> <span class="n">map</span><span class="p">(</span><span class="n">nTemp</span><span class="p">,</span> <span class="n">TEMPDOWN</span><span class="o">*</span><span class="mi">100</span><span class="p">,</span> <span class="n">TEMPUP</span><span class="o">*</span><span class="mi">100</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1023</span><span class="p">);</span> <span class="n">ledLight</span><span class="p">(</span><span class="n">nTemp</span><span class="p">);</span> <span class="n">delay</span><span class="p">(</span><span class="mi">100</span><span class="p">);</span> <span class="p">}</span> |
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Grove – Chainable RGB LED
The Grove Chainable RGB LED is based on P9813 chip which is a full-color light source LED driver chip,can provide constant current drive and modulated output of 256 gray.Transmission by wire (DATA and CLK), built-in recycling, can enhance the transmission distance.
Specifications
- Operating Voltage: 5V
- Operating Current: 20mA
- Communication Protocol: Serial
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