arduino code for .

Passive Infrared Receiver (PIR) Sensor:

The PIR sensor is a very simple device to use. There is a 3 pin connection for VCC, OUT, and GND. The VCC and GND should be connected to 5 volts and ground respectively. The OUT pin should connect to any of the digital input pins on the arduino. When the PIR sensor detects motion the OUT pin will go HIGH.

There are two potentiometers on your PIR sensor that can be used to adjust the sensitivity and the length of time that that the OUT pin stays high when motion is detected.

Create a simple motion alarm. Use the Piezo speaker to sound an alarm when motion is detected, sound the alarm for 10 seconds after motion is detected.