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[进阶] 自制一个PIR人体热感报警器

PIR简介

下面学一个简单的报警器，主控用attiny85
自制一个PIR人体热感报警器图2

[mw_shl_code=applescript,true]//---made by gada888---2018-08-30---
void setup() {
  pinMode(1, OUTPUT);
  pinMode(0, INPUT);
}

// the loop routine runs over and over again forever:
void loop() {

  int sensorValue = digitalRead(0);

  if(sensorValue==1)
  {
digitalWrite(1, HIGH);
delay(3000);
  }

  else
  {
digitalWrite(1, LOW);
  }

  delay(1);       // delay in between reads for stability
}[/mw_shl_code]
再来个个人原创的报警声音放大版的。
自制一个PIR人体热感报警器图1

[mw_shl_code=applescript,true]//---made by gada888-----
const int pirPin = 0; // PIR sensor
const int buzzer = 1; // buzzer

int alarmLength = 40;
// the setup routine runs once when you press reset:
void setup() {
  pinMode(1, OUTPUT);
  pinMode(0, INPUT);
}

// the loop routine runs over and over again forever:
void loop() {

  int sensorValue = digitalRead(0);
  if(sensorValue==1){
  while(alarmLength >= 0){
   alarmLength--;
   alarmOn(100);
}
alarmLength = 40;
}
else {
alarmOff();
  }
  delay(1);       // delay in between reads for stability
}
void alarmOn(int delayMs){
  analogWrite(buzzer, 100);
  delay(delayMs);
  analogWrite(buzzer, 0);
  delay(delayMs);
}

void alarmOff(){
  analogWrite(buzzer, 0);
}
[/mw_shl_code]
自制一个PIR人体热感报警器图5