• Arduino UNO 開發(fā)板

• Arduino聲音傳感器模塊

• 壓電蜂鳴器

• 男女跳線

• 7段顯示模塊

• 按鈕開關(guān)（推上、推下）

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7段顯示和聲音傳感器模塊

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壓電蜂鳴器

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工作原則

首先，用戶必須通過連接到設(shè)備的按鈕為壓力鍋預(yù)設(shè)所需的計數(shù)器（例如 2、4、5...最多 9 個）。現(xiàn)在設(shè)備將把任何沉重的聲音視為輸入并開始增加其內(nèi)部計數(shù)器。每當(dāng)壓力鍋發(fā)出哨聲時，計數(shù)器就會增加。如果它與預(yù)設(shè)數(shù)字匹配（我們在使用按鈕開關(guān)之前設(shè)置），蜂鳴器將被觸發(fā)并提醒用戶已達(dá)到所需的計數(shù)。

Arduino代碼

 //product Designed by Sourav Paul 
 //Date last updated on 05/06/18 , 07:09 AM
const int buttonPin = 13;     // the number of the pushbutton pin
const int buttonPowerPin =  2;      // the number of the LED pin
const int soundPin = 3; // the number of the sound sensor pin
int counter = 1; // set initial counter to value 1
const int buzzerPin = A1; // the number of buzzer pin
int whistle = 0; // initial whistle value to zero.
int buttonState = 0;         // current state of the button
int lastButtonState = 0;     // previous state of the button
int whistlestate = 0;
int lastwhistlestate = 0;     // previous state of the whistle
volatile int state = LOW;
boolean Counterflag = true;
unsigned long start, finished, elapsed;
//declare variables for 7 segment display
int seg_a = 11; // declare the variables
int seg_b = 10;
int seg_c = 9;
int seg_d = 8;
int seg_e = 7;
int seg_f = 6;
int seg_g = 5;
int seg_dp = 4;
int com = 12;
void blink() { 
  //ISR function
  state = !state; //toggle the state when the interrupt occurs
}
void print0()
{
 digitalWrite(seg_a,HIGH);
 digitalWrite(seg_b,HIGH);
 digitalWrite(seg_c,HIGH);
 digitalWrite(seg_d,HIGH);
 digitalWrite(seg_e,HIGH);
 digitalWrite(seg_f,HIGH);
 digitalWrite(seg_g,LOW);
 digitalWrite(seg_dp,LOW);
}
void print1()
{
 digitalWrite(seg_a,LOW);
 digitalWrite(seg_b,HIGH);
 digitalWrite(seg_c,HIGH);
 digitalWrite(seg_d,LOW);
 digitalWrite(seg_e,LOW);
 digitalWrite(seg_f,LOW);
 digitalWrite(seg_g,LOW);
 digitalWrite(seg_dp,LOW);
}
void print2()
{
  digitalWrite(seg_a,HIGH);
 digitalWrite(seg_b,HIGH);
 digitalWrite(seg_c,LOW);
 digitalWrite(seg_d,HIGH);
 digitalWrite(seg_e,HIGH);
 digitalWrite(seg_f,LOW);
 digitalWrite(seg_g,HIGH);
 digitalWrite(seg_dp,LOW);
}
void print3()
{
 digitalWrite(seg_a,HIGH);
 digitalWrite(seg_b,HIGH);
 digitalWrite(seg_c,HIGH);
 digitalWrite(seg_d,HIGH);
 digitalWrite(seg_e,LOW);
 digitalWrite(seg_f,LOW);
 digitalWrite(seg_g,HIGH);
 digitalWrite(seg_dp,LOW);
}
void print4()
{
digitalWrite(seg_a,LOW);
 digitalWrite(seg_b,HIGH);
 digitalWrite(seg_c,HIGH);
 digitalWrite(seg_d,LOW);
 digitalWrite(seg_e,LOW);
 digitalWrite(seg_f,HIGH);
 digitalWrite(seg_g,HIGH);
 digitalWrite(seg_dp,LOW);
}
void print5()
{
 digitalWrite(seg_a,HIGH);
 digitalWrite(seg_b,LOW);
 digitalWrite(seg_c,HIGH);
 digitalWrite(seg_d,HIGH);
 digitalWrite(seg_e,LOW);
 digitalWrite(seg_f,HIGH);
 digitalWrite(seg_g,HIGH);
 digitalWrite(seg_dp,LOW);
}
void print6()
{
 digitalWrite(seg_a,HIGH);
 digitalWrite(seg_b,LOW);
 digitalWrite(seg_c,HIGH);
 digitalWrite(seg_d,HIGH);
 digitalWrite(seg_e,HIGH);
 digitalWrite(seg_f,HIGH);
 digitalWrite(seg_g,HIGH);
 digitalWrite(seg_dp,LOW);
}
void print7()
{
 digitalWrite(seg_a,HIGH);
 digitalWrite(seg_b,HIGH);
 digitalWrite(seg_c,HIGH);
 digitalWrite(seg_d,LOW);
 digitalWrite(seg_e,LOW);
 digitalWrite(seg_f,LOW);
 digitalWrite(seg_g,LOW);
 digitalWrite(seg_dp,LOW);
}
void print8()
{
 digitalWrite(seg_a,HIGH);
 digitalWrite(seg_b,HIGH);
 digitalWrite(seg_c,HIGH);
 digitalWrite(seg_d,HIGH);
 digitalWrite(seg_e,HIGH);
 digitalWrite(seg_f,HIGH);
 digitalWrite(seg_g,HIGH);
 digitalWrite(seg_dp,LOW);
}
void print9()
{
 digitalWrite(seg_a,HIGH);
 digitalWrite(seg_b,HIGH);
 digitalWrite(seg_c,HIGH);
 digitalWrite(seg_d,HIGH);
 digitalWrite(seg_e,LOW);
 digitalWrite(seg_f,HIGH);
 digitalWrite(seg_g,HIGH);
 digitalWrite(seg_dp,LOW);
}
void setup() {
 digitalWrite(com,LOW);
 // initialize the pushbutton pin as an input:
 pinMode(buttonPin, INPUT);
 pinMode(buttonPowerPin, OUTPUT);
 digitalWrite(buttonPowerPin, HIGH);
 Serial.begin(9600);
 pinMode(soundPin, INPUT);
 pinMode(buzzerPin, OUTPUT);
 attachInterrupt(digitalPinToInterrupt(soundPin), blink, FALLING);
 pinMode(seg_a,OUTPUT); // configure all pins used to outputs
 pinMode(seg_b,OUTPUT);
 pinMode(seg_c,OUTPUT);
 pinMode(seg_d,OUTPUT);
 pinMode(seg_e,OUTPUT);
 pinMode(seg_f,OUTPUT);
 pinMode(seg_g,OUTPUT);
 pinMode(seg_dp,OUTPUT);
 pinMode(com,OUTPUT);
}
// func to play buzzer
void playbuzzer()
{
 digitalWrite(buzzerPin, HIGH);
 }
 // detect button state change
 void buttontstateChanged()
 {
   // read the pushbutton input pin:
buttonState = digitalRead(buttonPin);
 // compare the buttonState to its previous state
 if (buttonState != lastButtonState) {
   // if the state has changed, increment the counter
   if (buttonState == HIGH) {
     // if the current state is HIGH then the button went from off to on:
     counter++;
   } else {
   }
   // Delay a little bit to avoid bouncing
   delay(50);
 }
 // save the current state as the last state, for next time through the loop
 lastButtonState = buttonState;
 }
// print counter number in 7 segment display unit
void printcounterValue()
{
 switch(counter){
   case 1:
   print1();
   break;
   case 2:
   print2();
   break;
   case 3:
   print3();
   break;
   case 4:
   print4();
   break;
   case 5:
   print5();
   break;
   case 6:
   print6();
   break;
   case 7:
   print7();
   break;
   case 8:
   print8();
   break;
   case 9:
   print9();
   break;
 }
}
// print whistle number into 7 segment display 
void printwhistleValue()
{
 switch(whistle){
   case 0:
   print0();
   break;
   case 1:
   print1();
   break;
   case 2:
   print2();
   break;
   case 3:
   print3();
   break;
   case 4:
   print4();
   break;
   case 5:
   print5();
   break;
   case 6:
   print6();
   break;
   case 7:
   print7();
   break;
   case 8:
   print8();
   break;
   case 9:
   print9();
   break;
 }
}
//func to pre-set desired counter
void setCounter()
{
 start=millis();
 while(elapsed<=50000)    // 50 seconds time is given for setting counter timer
 {
 buttontstateChanged();
 printcounterValue();
 finished=millis();
 elapsed=finished-start;
 }
  Counterflag = false;
 }
void loop() {
 //Set counter at beginning of program
 if(Counterflag == true)
 {
 setCounter();
 }
 //calling whistle detecting function
printwhistleValue();
if(state==HIGH)
{
  whistle++;
 printwhistleValue();
  delay(20000); // 20 secs minimum gap is given between two whistle sounds.
  state = LOW;                                                                                                                                                                                                                                            ;
}
//compares if whistle number is greater than equal to pre-set counter, if yes then kick off buzzer alarm.
if(whistle>=counter)
{
 playbuzzer();
}
}