火焰传感器实验
实验目的
检测到火源报警
理论学习
火焰传感可以探测火源、热源。外籍红外光越强，数值越小，红外光越弱，数值越大
原理图
代码编写
#define adpin A0
#define buzzer 2
int adbuffer
= 0;
void setup() {
pinMode(buzzer
, OUTPUT
);
Serial
.begin(9600);
}
void loop() {
adbuffer
= analogRead(adpin
);
Serial
.print("ad = ");
Serial
.println(adbuffer
);
if (adbuffer
> 20) {
digitalWrite(buzzer
, HIGH
);
}
else {
digitalWrite(buzzer
, LOW
);
}
delay(500);
}
