Here is an ultra simple Arduino Night Alarm project wired around a handful of inexpensive and easily available components. One advantage of using Arduino as a security system is the flexibility!

Intruder Alarm System using PIR Sensor This project demonstrates how to build an Intruder Alarm System using an HC-SR501 PIR sensor, Arduino Uno, a 5V relay, and a buzzer. The system detects motion ...

Initialization: Sets up pin modes for the LED, PIR sensor, and piezo buzzer. Begins serial communication with a baud rate of 9600. Delays for 5 seconds to ensure stable start-up. Motion Detection: ...

In an era where homeowners frequently leave for work or education, robust security for residences is imperative. Traditional security measures, including window and door locks, present challenges such ...