PIR Passive Infrared Motion Sensor

The PIR (Passive Infrared) Motion Sensor project demonstrates how to use an Arduino Nano to interface with a PIR motion sensor. PIR sensors detect motion by sensing changes in infrared radiation emitted by nearby objects. In this project, the sensor detects motion and sends a signal to the Arduino Nano, which then processes the input and triggers an action, such as turning on a light or sounding an alarm.

Components Needed

• Arduino Nano
• PIR Motion Sensor
• Jumper Wires

Circuit Diagram

Circuit Setup

1.Connect PIR Motion Sensor to Arduino Nano:

Connect the signal (OUT) pin of the PIR motion sensor to digital pin 2 on the Arduino Nano.

Ensure proper power (VCC) and ground (GND) connections for the PIR motion sensor.

Instructions

1.Circuit Setup:

Wire the PIR motion sensor to the Arduino Nano as described in the circuit setup section.

2.Power Supply:

Ensure the power supply connected to the PIR motion sensor is appropriate for its voltage requirements.

3.Code Upload:

Open the Arduino IDE and paste the provided code.

Upload the code to the Arduino Nano.

4.Testing:

Once the code is uploaded, open the serial monitor.

The serial monitor will display "Motion Detected!" when motion is detected by the sensor, and "No Motion Detected" when there is no motion.

Applications

Security Systems: Use in security systems to detect motion and trigger alarms or notifications.

Automatic Lighting: Control lighting systems to turn on/off automatically based on detected motion.

Energy Saving: Implement energy-saving measures by activating devices only when motion is detected.

Notes

Adjust the delay in the code to customize the sensor's response time and reduce false triggers.

Experiment with different sensitivity settings on the PIR motion sensor to optimize performance for specific applications.

Ensure the sensor is positioned correctly to cover the desired area for motion detection.