SAFE - Security system

Project Group 2 - Course 3
Assignment to summarize our third course and prepare for the next.
Contributors: Sabina, Alexander, Filip, Jacob, Johan

File tree/Structure:

course3_projectgroup2_security_system/
├── docs/
│   ├── Assignment/
│   │   └── Projectassignment.pdf
│   ├── Functionality/
│   │   └── Variable & function-list.md
│   └── Instructions/
│       ├── Arduino_IDE.md
│       ├── connect.md
│       └── manual.md
│   
├── src/
│   └── SAFE_AlarmSystem_V1/
│       └── SAFE_AlarmSystem_V1.ino
│
├── tools/
│   ├── Saf.png
│   ├── SAFE_Alarm_System_V1.png
│   └── SAFE_Alarm_System_V1_Schematic.pdf
│
└── README.md 

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Links that we have used during the construction of our prototype

Kanban/Project Board

TinkerCAD sketch

Presentation

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Overview:

Develop a security alarm system that detects motion using an infrared sensor. The alarm system consists of the following components:

• Infrared motion sensor - detects movement.
• One buzzer - signals when motion is detected and when the alarm is activated.
• Pushbutton - deactivates the alarm.
• LCD display - outputs the current alarm status (on/off/alarm triggered).
• RGB-LED - indicates system status: Green = alarm is off and red = alarm is on.

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Components (no extensions included):

• One Arduino Uno R4 Wifi or other compatible controller
• One breadboard
• One buzzer
• One LCD display
• One *infrared sensor
• One pushbutton
• One RGB-LED (can be replaced by a red and green LED)

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Potential extensions (if time and resources are available):

• Replace pushbuttons with a keypad for code entry.
• Replace current LCD display with a LCD I2C-display
• Enable admin access to change the personal password.
• Expand with servo function (door latch).
• Expand the alarm with diffrent sensors for example ultrasound or vibrationdetector.

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Instructions for usage:

Follow these instructions to build a complete prototype.

1. Connect the hardware. Link to instructions to connect physical hardware
2. Build code using C++/Arduino IDE. Link to source code
3. Schematics for prototype. Link to schematics
4. Manual for completed prototype. How to use the device

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• System Requirements – SAFE Security System

  • Hardware

    • Microcontroller:
    • Arduino Uno or compatible board.
    • Minimum 13 digital I/O pins (9 used: pins 2–12).
    • RAM: 2 KB is sufficient.
    • Flash memory: Approximately 5–10 KB used (Uno has 32 KB – more than enough).

  • Required Components:

    Component	Pin(s)	Description
    LCD Display (16x2)	RS (11), E (12), D4 (2), D5 (3), D6 (4), D7 (5)	Displays system messages
    PIR Motion Sensor	Pin 6	Detects motion
    Pushbutton	Pin 10	Turns alarm mode ON/OFF and stops the alarm
    Buzzer	Pin 9	Sounds when motion is detected
    Red LED	Pin 7	Blinks when alarm is triggered
    Green LED	Pin 8	Indicates system is active and in standby mode

    • Power Supply:
      • 5V via USB or an external power source (e.g. 9V adapter).

• Software

  • Requirements:

    • Arduino IDE (version 1.8.x or higher recommended)
    • LiquidCrystal Library (included by default in Arduino IDE)

• General notes:

  • This code is designed for entry-level Arduino boards like the Uno or Nano.
  • It does not require additional memory or advanced features.
  • All functionality fits well within the limitations of the Arduino Uno.
  • All components used are commonly available in be