Human Body Infrared Sensor Experiment Based on Arduino

This experiment uses infrared sensors to detect if anyone is moving around the sensor. If so, the buzzer will sound an alarm.

Material:

• Arduino

• breadboard

• LED

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Here is the connection diagram:

Here is the code:

int Sensor_pin = 3;
int ledpin = 11;
void setup()
{
pinMode(Sensor_pin, INPUT); // Set the human infraredinterface as the input state 
pinMode(ledpin, OUTPUT);
Serial.begin(9600);
Serial.flush();
Serial.println("Ready");
}
void loop()
{
int val = digitalRead(Sensor_pin); // Define parameters to storethe state read by the human infrared senso
if (val == 1) // Buzzer make alarm if someone is detected
{
Serial.println("There is sb moving");
digitalWrite(ledpin, HIGH);
}
else
{
Serial.println("There isn't sb moving");
digitalWrite(ledpin, LOW);
}
delay(100); // Delay 100 milliseconds }

Lastly, I recommend watching Anthony's project video.