SIT315 Module 1 – Task M1QP (4/4 Distinction)

Complete Interrupt-Driven Sense–Think–Act System

Author: Aarya Patel
Platform: Arduino Uno (TinkerCAD Simulation)

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Project Overview

This project implements a real-time, interrupt-driven embedded system designed around the Sense–Think–Act model.
It integrates three interrupt types — Pin Change, External, and Timer — to demonstrate concurrency, modularity, and reliable state management in an embedded environment.

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System Components

Component	Pin	Description
Switch 1	D10	PCI input
Switch 2	D11	PCI input
Switch 3	D2	External interrupt
Potentiometer	A0	Analog sensor
LED	D13	Output indicator
Buzzer	D6	Output actuator

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Features

• PCI (D10, D11): Detects simultaneous switch states for LED logic.
• External Interrupt (D2): Triggers buzzer alerts on change.
• Timer Interrupt: Executes every 0.5s to read potentiometer and detect threshold events.
• Non-blocking ISR design: All ISRs use flags, ensuring interrupt safety.
• Completely simulated in TinkerCAD, no physical hardware required.

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Logic Summary

Condition	Output
S1 + S2 active	LED ON
S3 active	Buzzer beep
Potentiometer > 700	LED flash
Any other	LED OFF

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How to Run

1. Open the project in TinkerCAD Circuits.
2. Connect components as described above.
3. Upload the provided TaskM1.cpp code.
4. Start simulation and observe Serial Monitor output.

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