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Arduino示例代码讲解： Project 12 - Knock Lock 锁

backend 2025/5/16 11:17:46

Arduino示例代码讲解： Project 12 - Knock Lock 锁

Project 12 - Knock Lock 锁
- 程序功能概述
- - - 功能：
    - 硬件要求：
    - 输出：
- 代码结构
- - - 全局变量
    - `setup()` 函数
    - `loop()` 函数
    - 未锁定状态：
    - 锁定状态：
    - `checkForKnock()` 函数
- 运行过程
- 注意事项

Project 12 - Knock Lock 锁

这段代码是一个Arduino程序，用于实现一个“敲击锁”项目，通过敲击传感器（压电传感器）和按钮控制一个伺服电机，模拟一个锁的开合。

/*Arduino Starter Kit exampleProject 12  - Knock LockThis sketch is written to accompany Project 12 in theArduino Starter KitParts required:1 Megohm resistor10 kilohm resistorthree 220 ohm resistorspiezoservo motorpush buttonone red LEDone yellow LEDone green LED100 uF capacitorCreated 18 September 2012by Scott FitzgeraldThanks to Federico Vanzati for improvementshttp://arduino.cc/starterKitThis example code is part of the public domain*/// import the library
#include <Servo.h>
// create an instance of the servo library
Servo myServo;const int piezo = A0;      // pin the piezo is attached to
const int switchPin = 2;    // pin the switch is attached to
const int yellowLed = 3;    // pin the yellow LED is attached to
const int greenLed = 4;    // pin the green LED is attached to
const int redLed = 5;   // pin the red LED is attached to// variable for the piezo value
int knockVal;
// variable for the switch value
int switchVal;// variables for the high and low limits of the knock value
const int quietKnock = 10;
const int loudKnock = 100;// variable to indicate if locked or not
boolean locked = false;
// how many valid knocks you've received
int numberOfKnocks = 0;void setup() {// attach the servo to pin 9myServo.attach(9);// make the LED pins outputspinMode(yellowLed, OUTPUT);pinMode(redLed, OUTPUT);pinMode(greenLed, OUTPUT);// set the switch pin as an inputpinMode(switchPin, INPUT);// start serial communication for debuggingSerial.begin(9600);// turn the green LED ondigitalWrite(greenLed, HIGH);// move the servo to the unlocked positionmyServo.write(0);// print status to the serial monitorSerial.println("the box is unlocked!");
}void loop() {// if the box is unlockedif (locked == false) {// read the value of the switch pinswitchVal