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Welcome back tech enthusiasts
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In today's video, we'll be exploring how to use a passive infrared sensor
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or PIR sensor with Arduino to detect motion. Whether you're building a security system or an automated lighting system
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this project is a great starting point. Let's get started. A PIR sensor detects motion by measuring changes in infrared radiation
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in its environment, when a warm body like a human or an animal passes in front of the sensor, it triggers a signal
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Today, we'll use this signal to light up an LED and send a message
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to the serial monitor. Here's what you'll need for this project. Arduino board, PIR sensor, LED, 220 ohm resistor for the LED
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breadboard and jumper wires. First, let's set up our circuit. Connect the VCC pin of the PIR sensor to the 5V pin on the Arduino
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the GND pin to the GND on the Arduino, and the out pin to digital pin
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two on the Arduino for the LED. Connect its anode longer leg to digital pin eight and its cathode
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shorter leg to a 220 ohm resistor. Then connect the other end of the resistor to the GND pin on the Arduino
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Give me a moment here while I assemble the circuit. I'm going to put the LED in the middle of the board
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I'm going to connect the LED to the pin on the Arduino. Connect the other end of the resistor to the GND pin on the Arduino
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Connect the other end of the resistor to the GND pin on the Arduino. Connect the other end of the resistor to the GND pin on the Arduino
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Connect the other end of the resistor to the GND pin on the Arduino. Connect the other end of the resistor to the GND pin on the Arduino
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Connect the other end of the resistor to the GND pin on the Arduino. Connect the other end of the resistor to the GND pin on the Arduino
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Connect the other end of the resistor to the GND pin on the Arduino. Connect the other end of the resistor to the GND pin on the Arduino
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Connect the other end of the resistor to the GND pin on the Arduino. Connect the other end of the resistor to the GND pin on the Arduino
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Connect the other end of the resistor to the GND pin on the Arduino. Connect the other end of the resistor to the GND pin on the Arduino
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Connect the other end of the resistor to the GND pin on the Arduino. Connect the other end of the resistor to the GND pin on the Arduino
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Connect the other end of the resistor to the GND pin on the Arduino. Connect the other end of the resistor to the GND pin on the Arduino
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Once detected, the sensor's output pin goes high and we turn on the LED and print
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MOTION DETECTED to the serial monitor. The delay of one second prevents repeated detections
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If no motion is detected, the LED remains off. Upload the code to your Arduino board
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Once the upload is complete, open the serial monitor to see the motion detection messages
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Wave your hand in front of the sensor. You should see the LED light up and the message MOTION DETECTED appear on the serial monitor
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If you don't see this, double check your wiring and code. Great job! You've just learned how to use a PIR sensor with Arduino to detect motion
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This foundational project can be expanded into more complex systems like security alarms or automated lighting
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If you enjoyed this video, please like, subscribe, and hit the bell icon for more exciting tech projects
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Thanks for watching and happy tinkering
