本篇文章，我们将使用Arduino制作一个播放 《星球大战》音乐的装置。

原件清单

1. Arduino UNO
2. 蜂鸣器
3. 连接线

电路图

电路很简单，只需要把蜂鸣器的正极连接到Arduino UNO的数字针5，负极连接到GND即可完成。

代码

这是一个非常简单的项目，项目的硬件部分对每一个人来说均不存在困难，稍微困难一点的应该是代码部分，下面提供本项目完整的代码，供大家参考。重点是各种声音的数值，完整代码如下：

**/
const int c = 261;
const int d = 294;
const int e = 329;
const int f = 349;
const int g = 391;
const int gS = 415;
const int a = 440;
const int aS = 455;
const int b = 466;
const int cH = 523;
const int cSH = 554;
const int dH = 587;
const int dSH = 622;
const int eH = 659;
const int fH = 698;
const int fSH = 740;
const int gH = 784;
const int gSH = 830;
const int aH = 880;
const int buzzerPin = 5;
const int ledPin1 = 12;
const int ledPin2 = 13;
int counter = 0;
void setup()
{
//Setup pin modes
pinMode(buzzerPin, OUTPUT);
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
}
void loop()
{
//Play first section
firstSection();
//Play second section
secondSection();
//Variant 1
beep(f, 250); 
beep(gS, 500); 
beep(f, 350); 
beep(a, 125);
beep(cH, 500);
beep(a, 375); 
beep(cH, 125);
beep(eH, 650);
delay(500);
//Repeat second section
secondSection();
//Variant 2
beep(f, 250); 
beep(gS, 500); 
beep(f, 375); 
beep(cH, 125);
beep(a, 500); 
beep(f, 375); 
beep(cH, 125);
beep(a, 650); 
delay(650);
}
void beep(int note, int duration)
{
//Play tone on buzzerPin
tone(buzzerPin, note, duration);
//Play different LED depending on value of 'counter'
if(counter % 2 == 0)
{
digitalWrite(ledPin1, HIGH);
delay(duration);
digitalWrite(ledPin1, LOW);
}else
{
digitalWrite(ledPin2, HIGH);
delay(duration);
digitalWrite(ledPin2, LOW);
}
//Stop tone on buzzerPin
noTone(buzzerPin);
delay(50);
//Increment counter
counter++;
}
void firstSection()
{
beep(a, 500);
beep(a, 500); 
beep(a, 500);
beep(f, 350);
beep(cH, 150); 
beep(a, 500);
beep(f, 350);
beep(cH, 150);
beep(a, 650);
delay(500);
beep(eH, 500);
beep(eH, 500);
beep(eH, 500); 
beep(fH, 350);
beep(cH, 150);
beep(gS, 500);
beep(f, 350);
beep(cH, 150);
beep(a, 650);
delay(500);
}
void secondSection()
{
beep(aH, 500);
beep(a, 300);
beep(a, 150);
beep(aH, 500);
beep(gSH, 325);
beep(gH, 175);
beep(fSH, 125);
beep(fH, 125); 
beep(fSH, 250);
delay(325);
beep(aS, 250);
beep(dSH, 500);
beep(dH, 325); 
beep(cSH, 175); 
beep(cH, 125); 
beep(b, 125); 
beep(cH, 250); 
delay(350);
}