警灯，警铃四合一【Arduino玩具】

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[演示视频+拼装]

Bill of Material:
Arduino Uno x1; 蜂鸣器 x1; 按钮开关 x2; LEDs x 6（红,蓝,白,至少各两个); 电阻(220 x1, 100 x6, 10K x2); 面包板还有面包板线。

接线图：

Arduino IDE 代码：

/** Project: Toy Police Siren 项目：玩具警灯+警铃四合一* * Last Edited: Jan.11th.2021 by Mun Kim 神勇老金
*/int freq, dur; //Define buzzer tone frequency and duration of each tone. 喇叭的频率与时长
const int buzzer = 12;// Buzzer on pin D12 喇叭接到D12void setup() {pinMode(buzzer, OUTPUT); pinMode(5,OUTPUT); //Blue LED 蓝灯pinMode(6,OUTPUT); //Blue LED pinMode(7,OUTPUT); //White LED 白灯pinMode(8,OUTPUT); //White LED pinMode(9,OUTPUT); //Red LED 红灯pinMode(10,OUTPUT);//Red LED
}void loop() {//Rising Pitch**************************************************************************************************************警铃的前半段for(freq=635;freq<=912;freq++){tone(buzzer,freq);delay(dur);// LED Control 警灯的控制。if(freq<670){  //Top 2 Red LEDs light up. 点亮最上方的两个红色LEDdigitalWrite(10,HIGH); digitalWrite(9, HIGH); digitalWrite(8, LOW); digitalWrite(7, LOW); digitalWrite(6, LOW); digitalWrite(5, LOW);} if( (freq>=670)&&(freq<700)){ //Red to White transition 点亮第二个红色LED和第一个白色LEDdigitalWrite(10, LOW); digitalWrite(9, HIGH); digitalWrite(8, HIGH);digitalWrite(7, LOW); digitalWrite(6, LOW); digitalWrite(5, LOW);}if( (freq>=700)&&(freq<730))

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