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Arduino示例代码讲解：Pitch follower 跟随

news 2025/7/11 7:50:35

Arduino示例代码讲解：Pitch follower 跟随

Pitch follower
- - 代码功能
  - 代码逐行解释
  - - 1. 注释部分
    - 功能：
    - 硬件连接：
    - 2. `setup()` 函数
    - 3. `loop()` 函数
  - 硬件连接
  - - **扬声器连接**：
    - **光敏电阻连接**：
    - **Arduino板**：
  - 运行结果
  - 修改建议
- 视频讲解

Pitch follower

这段代码是一个Arduino示例程序，名为“Pitch follower”，用于根据模拟输入的变化动态调整扬声器发出的音调。

/*
  Pitch follower

 Plays a pitch that changes based on a changing analog input

 circuit:
 * 8-ohm speaker on digital pin 9
 * photoresistor on analog 0 to 5V
 * 4.7K resistor on analog 0 to ground

 created 21 Jan 2010
 modified 31 May 2012
 by Tom Igoe, with suggestion from Michael Flynn

This example code is in the public domain.

 http://arduino.cc/en/Tutorial/Tone2

 */


void setup() {
   
  // initialize serial communications (for debugging only):
  Serial.begin(9600);
}

void loop() {
   
  // read the sensor:
  int sensorReading = analogRead(A0);
  // print the sensor reading so you know its range
  Serial.println(sensorReading);
  // map the analog input range (in this case, 400 - 1000 from the photoresistor)
  // to the output pitch range (120 - 1500Hz)
  // change the minimum