描述

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在本教程中，我將向您展示如何用嘴打開 LED。當開始吹聲音傳感器時，LED 將亮起。

第 1 步：材料和設置

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這個項目需要的材料是：

• Linkit One 板
• LED
• 數字聲音傳感器
• 3公對母跳線
• 微型 USB 數據線

要設置 LinkIt ONE 開發板，請點擊此鏈接

傳感器與 LinkIt ONE 開發板的連接：

傳感器 LinkIt ONE

5v<------------>5v

接地 <--------> 接地

輸出 <----------> D2

第 2 步：代碼

將此代碼上傳到您的 LinkIt ONE 開發板。這實際上是來自 Arduino IDE 的數字上拉示例

/* Input Pullup Serial This example demonstrates the use of pinMode(INPUT_PULLUP). It reads a digital input on pin 2 and prints the results to the serial monitor. The circuit: * Momentary switch attached from pin 2 to ground * Built-in LED on pin 13 Unlike pinMode(INPUT), there is no pull-down resistor necessary. An internal 20K-ohm resistor is pulled to 5V. This configuration causes the input to read HIGH when the switch is open, and LOW when it is closed. created 14 March 2012 by Scott Fitzgerald http://www.arduino.cc/en/Tutorial/InputPullupSerial This example code is in the public domain */void setup() {  //start serial connection  Serial.begin(9600);  //configure pin2 as an input and enable the internal pull-up resistor  pinMode(2, INPUT_PULLUP);  pinMode(13, OUTPUT);}void loop() {  //read the pushbutton value into a variable  int sensorVal = digitalRead(2);  //print out the value of the pushbutton  Serial.println(sensorVal);  // Keep in mind the pullup means the pushbutton's  // logic is inverted. It goes HIGH when it's open,  // and LOW when it's pressed. Turn on pin 13 when the  // button's pressed, and off when it's not:  if (sensorVal == HIGH) {    digitalWrite(13, LOW);  }  else {    digitalWrite(13, HIGH);  }}

第 3 步：測試

上傳代碼后。打開串口監視器，然后當你吹響聲音傳感器時，你會看到 LED 也會亮起。

吹的時間越長，LED 點亮的時間就越長。