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(dāng)開始吹聲音傳感器時(shí)，LED 將亮起。

第 1 步：材料和設(shè)置

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這個(gè)項(xiàng)目需要的材料是：

• Linkit One 板
• LED
• 數(shù)字聲音傳感器
• 3公對母跳線
• 微型 USB 數(shù)據(jù)線

要設(shè)置 LinkIt ONE 開發(fā)板，請點(diǎn)擊此鏈接

傳感器與 LinkIt ONE 開發(fā)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(fā)板。這實(shí)際上是來自 Arduino IDE 的數(shù)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(jiān)視器，然后當(dāng)你吹響聲音傳感器時(shí)，你會(huì)看到 LED 也會(huì)亮起。

吹的時(shí)間越長，LED 點(diǎn)亮的時(shí)間就越長。