Arduino示例代码讲解：Pitch follower 跟随
Arduino示例代码讲解：Pitch follower 跟随
- Pitch follower
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- 代码功能
- 代码逐行解释
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- 1. 注释部分
- 功能：
- 硬件连接：
- 2. `setup()` 函数
- 3. `loop()` 函数
- 硬件连接
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- **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
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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