Arduino-Security-Project

Overview

This project is a custom Arduino device that I planned, designed, programmed, and soldered entirely myself. It demonstrates hardware-software integration, C++ programming, and problem-solving in building a fully functional electronic project.

When the PIR sensor detects movement, the device:

• Triggers an alarm (active buzzer)
• Increments a digital counter displayed on a dot matrix module

The project was developed with a strong focus on object-oriented programming in C++, efficient hardware control, and systematic debugging of both electrical and software issues.

Features

• Works with multiple components connected to an Arduino via a perfboard (or breadboard)
• Displays two-digit numbers on a dot matrix module
• Uses IR receiver and PIR sensor modules for input detection
• Fully programmed in C++ using object-oriented principles

Components / Hardware Required

• Arduino nano (or compatible board)
• Dot Matrix Display Module
• IR Receiver Module
• PIR Sensor
• Active Buzzer
• Red and Green LEDs
• Perfboard, wires, resistors
• Soldering tools

Software / Libraries Required

• Arduino IDE
• Libraries: LedControl, IRremote, Arduino

How to Run

• Connect all components to the Arduino
• Open the Arduino IDE and load the Motion_Sensor_Project.ino file
• Install all required libraries
• Upload the code to the Arduino board

How to Use

• Press power button on remote to turn on device
• Press 0 to reset counter on display
• Press VOL- to mute the buzzer
• Press VOL+ to unmute the buzzer
• Press power button to turn off device

Skills Demonstrated / Learned

• Circuit building with complex electronic components
• Assembling circuit with microscope and tweezers
• Hardware control via Arduino programming
• Soldering and assembly of electronic components
• Debugging both hardware and software issues
• Independent planning, design, and implementation of a working project

Problems Solved

• IR receiver module malfunction: Diagnosed with a multimeter, desoldered faulty connection, and resoldered.
• Two-digit display issue on dot matrix module: Implemented timed switching between digits.
• Incorrect PIR sensor header pins: Replaced with longer pins for proper soldering.
• LED connected to invalid analog pin: Resoldered to a correct output pin.