ARDUINO MOTION SENSOR

About arduino board and ultrasonic sensor.

1. Motion Detection Using Arduino B y Ahmad Reshd & Sajad Ali

2. TABLE OF CONTENTS 01 03 02 04 INTRODUCTION Hardware Connection How To Connect The sensors. Software Implementation Operation What is The purpose of This Project. Implementation of the Logic To Code. How it Works.

3. INTRODUCTION 01 What is The purpose of This Project.

4. What is The purpose of This Project. The project is a motion-activated alarm system using an Arduino board, a PIR (Passive Infrared) motion sensor, and a buzzer. The purpose of the project is to detect any movement within the sensor's range and activate an alarm in the form of a buzzer.

5. Hardware Connections 02 How To Connect The sensors.

6. Hardware Connections The PIR motion sensor is connected to a digital pin on the Arduino board. In this project, it is connected to digital pin 2. The buzzer is connected to another digital pin on the Arduino board. In this project, it is connected to digital pin 3.

7. Hardware Connections The PIR motion sensor is connected to a digital pin on the Arduino board. In this project, it is connected to digital pin 2. The buzzer is connected to another digital pin on the Arduino board. In this project, it is connected to digital pin 3.

8. Software Implementation 03 Implementation of the Logic To Code.

9. Software Implementation The Arduino code sets up the necessary configurations in the setup() function. In the loop() function, it continuously checks for motion detected by the PIR sensor. If motion is detected, the buzzer is activated, producing a sound. When no motion is detected, the buzzer remains silent.

10. C ode… #include < Adafruit_Sensor.h > # include < Wire.h > #include <Adafruit_MLX90614.h> // Constants #define PIR_PIN 2 // PIR motion sensor pin #define BUZZER_PIN 3 // Buzzer pin #define LED_PIN 4 // LED pin // Variables int pirState = LOW; // PIR sensor state int alarmState = LOW; // Alarm state

11. C ode… // Initialize PIR motion sensor int calibrationTime = 30; long unsigned int lowIn ; long unsigned int pause = 5000; boolean lockLow = true; boolean takeLowTime ; int calibrationDelay = 5000; // Initialize buzzer const int buzzerFrequency = 2000; // Buzzer frequency in Hz const int buzzerDuration = 2000; // Buzzer duration in milliseconds

12. C ode…(void setup() ) void setup() { // Initialize serial communication Serial.begin (9600); // Set pin modes pinMode (PIR_PIN, INPUT); pinMode (BUZZER_PIN, OUTPUT); pinMode (LED_PIN, OUTPUT); // Calibrate PIR motion sensor digitalWrite (PIR_PIN, LOW); delay( calibrationDelay ); lowIn = digitalRead (PIR_PIN); delay( calibrationTime );

13. C ode…(void setup() ) // Initialize the buzzer tone(BUZZER_PIN, buzzerFrequency ); delay( buzzerDuration ); noTone (BUZZER_PIN); // Print initialization message Serial.println ("Motion Detection Alarm System Initialized"); Serial.println ("----------------------------------------"); }

14. C ode…(void loop()) // Read PIR motion sensor state int pirReading = digitalRead (PIR_PIN); if ( pirReading == HIGH && pirState == LOW) { // Motion detected pirState = HIGH; alarmState = HIGH;

15. C ode…(void loop()) // Activate alarm digitalWrite (LED_PIN, HIGH); tone(BUZZER_PIN, buzzerFrequency ); Serial.println ("Motion Detected! Alarm Activated"); Serial.println ("----------------------------------------"); } else if ( pirReading == LOW && pirState == HIGH) { // Motion stopped pirState = LOW; alarmState = LOW;

16. C ode…(void loop()) // Deactivate alarm digitalWrite (LED_PIN, LOW); noTone (BUZZER_PIN); Serial.println ("Motion Stopped! Alarm Deactivated"); Serial.println ("----------------------------------------"); } if ( alarmState == HIGH) { // Print alarm status Serial.println ("Alarm is active"); } else { // Print alarm status Serial.println ("Alarm is inactive"); } delay(100); }

17. Operation 04 How The Project Works.

18. Operation When the PIR sensor detects motion, it sends a signal to the Arduino board. The Arduino board receives the signal and triggers the buzzer to produce sound. The buzzer continues to produce sound until the motion is no longer detected. Once the motion is no longer detected, the buzzer stops producing sound.

19. Continue… This project can be used as a simple security system to detect unauthorized movement in a specific area. It can be placed in a room, hallway, or any other location where motion detection is desired. The buzzer serves as an audible alert to draw attention to the detected motion.

20. THANKS! DO YOU HAVE ANY QUESTIONS? [email protected] [email protected]