查看10K电位器的源代码


[[Image:10K电位器.jpg|100px|thumb|10K电位器V1]]
[[Image:电位器模块.jpg|400px|thumb|10K电位器V2]]



=== 产品简介 ===
<br>
10K电位器采用WH148 10K电位器，3引脚直接焊接杜邦线，连接更方便！



=== 规格参数 ===
<br>
*供电电压：DC5V
*阻值：10KΩ
*耐电压:AC 250 V
*绝缘阻抗:More than 100MΩ
*开关接触阻抗:< 50mΩ
*开关额定功率:1.0A at AC/DC 12V
*全回转角度:300±10度
*旋转力距:20~200 gf.cm
*旋转止动强度:6.0Kgf.cm Min
*旋转寿命:10000 Cycles
*模块尺寸：29*20*35MM（长*宽*高）
*模块重量：13.0g



=== 引脚说明 ===
<br>
*1. G 黑线  --  Gnd(地)
*2. V 红线  --  Vcc(电源+5V)
*3. S 白线  --  信号


=== 应用示例 ===
<br>

'''电路连接示意图'''
<br>
:'''电位器模块'''的 G、V、S分别连接 '''Arduino UNO'''的GND、VCC(+5V)、A0引脚。
<img src="http://wiki.yfrobot.com/image/sensor_circuit/potentiometer1.png-yf"  alt="potentiometer1" />



'''示例代码'''
<br><br>
<font color="darkcyan">'''示例一'''</font>：电位器值串口打印
<br>
<pre >
/*
 Potentiometer Test
*/
int pPin = A0;
int pVal = 0;
int pVal_old = 0;
void setup()
{
  pinMode(pPin,INPUT);      
  Serial.begin(9600);  
}
void loop()
{
  //读取A0模拟口的数值（0-5V 对应 0-1204取值）
  pVal = analogRead(pPin);   
  if(abs(pVal - pVal_old) >= 2 ){
    Serial.println(pVal); 
    pVal_old = pVal;
  }
}
</pre>
程序下载地址：[https://eyun.baidu.com/s/3miecpcc PotentiometerTest]

程序运行结果：电位器值串口打印，结果如下图：

[[File:电位器串口输出.png|450px|center]]


<br><br>
<font color="darkcyan">'''示例二'''</font>：电位器控制[http://www.yfrobot.com/wiki/index.php?title=%E5%BD%A9%E8%89%B2LED%E6%A8%A1%E5%9D%97 彩色LED模块]变色
<br>
'''电路连接示意图'''
<img src="http://wiki.yfrobot.com/image/sensor_circuit/potentiometer2.png-yf"  alt="potentiometer2" />
<br>

<pre>

/*
  Potentiometer control RGB LED change color
*/

#include <Adafruit_NeoPixel.h>

#define RGBLEDPin  5
#define NUMPIXELS  4
#define pPin  A0

// 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, RGBLEDPin, NEO_GRB + NEO_KHZ800);

int pVal = 0;
int RVal = 0;
int GVal = 0;
int BVal = 0;

void setup()
{
  pinMode(RGBLEDPin, OUTPUT);
  pixels.begin(); // This initializes the NeoPixel library.
  pixels.show();
}

void loop()
{
  pVal = analogRead(pPin);    //读取A0模拟口的数值（0-5V 对应 0-1203取值）
  if (pVal >= 0 && pVal <= 170) {
    RVal = 255;
    GVal = 0;
    BVal = map(pVal, 0, 170, 0, 255);
  } else if (pVal > 170 && pVal <= 340) {
    RVal = map(pVal, 170, 340, 255, 0);
    GVal = 0;
    BVal = 255;
  } else if (pVal > 340 && pVal <= 510) {
    RVal = 0;
    GVal = map(pVal, 340, 510, 0, 255);
    BVal = 255;
  } else if (pVal > 510 && pVal <= 680) {
    RVal = 0;
    GVal = 255;
    BVal = map(pVal, 510, 680, 255, 0);
  } else if (pVal > 680 && pVal <= 850) {
    RVal = map(pVal, 680, 850, 0, 255);
    GVal = 255;
    BVal = 0;
  } else {
    RVal = 255;
    GVal = map(pVal, 850, 1023, 255, 0);
    BVal = 0;
  }
  lightLED(RVal, GVal, BVal);
}

void lightLED(int r, int g , int b) {
  // 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, r, g, b); // Moderately bright green color.
    pixels.show(); // This sends the updated pixel color to the hardware.
  }
}

</pre>

程序下载地址：[https://eyun.baidu.com/s/3dFaSHgP ChangeColor]

程序运行结果：转动电位器，彩色led变色。点击查看视频：[ ]



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