如何用嘴打开LED

描述

 

 

在本教程中，我将向您展示如何用嘴打开 LED。当开始吹声音传感器时，LED 将亮起。

第 1 步：材料和设置

 

 

这个项目需要的材料是：

• Linkit One 板
• LED
• 数字声音传感器
• 3公对母跳线
• 微型 USB 数据线

要设置 LinkIt ONE 开发板，请点击此链接

传感器与 LinkIt ONE 开发板的连接：

传感器 LinkIt ONE

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

接地 <--------> 接地

输出 <----------> D2

第 2 步：代码

将此代码上传到您的 LinkIt ONE 开发板。这实际上是来自 Arduino IDE 的数字上拉示例

/* 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：测试

上传代码后。打开串口监视器，然后当你吹响声音传感器时，你会看到 LED 也会亮起。

吹的时间越长，LED 点亮的时间就越长。