🕌 Arduino-Based Time Controlled LED System

⏱️ Automated LED and Buzzer Control for Prayer Time Management
Built with Arduino Uno, DS3231 RTC, LCD, EEPROM & Push Buttons

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📘 Overview

This project introduces an Arduino-based time-controlled LED and buzzer system that helps users avoid Makruh times — specific periods during which prayers are discouraged in Islamic practice.
The system automatically tracks time using a DS3231 RTC, displays status on an LCD, and triggers visual (LED) and audible (buzzer) alerts.

Developed as part of the EEE 3210 – Microprocessor, Interfacing, and System Design Lab at
Ahsanullah University of Science and Technology (AUST).

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✨ Key Highlights

✅ Real-time tracking using DS3231 RTC
✅ LCD interface for displaying live clock & status
✅ EEPROM memory to retain data after power-off
✅ Push buttons for user configuration
✅ Red/Green LEDs + buzzer for instant feedback
✅ Manual override via Serial Monitor

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⚙️ Hardware Components

Component	Quantity	Description
Arduino Uno	1	Microcontroller board
DS3231 RTC Module	1	High-accuracy real-time clock
LCD 16x2 (I2C)	1	Displays time & LED status
Red LED	1	Indicates restricted (Makruh) time
Green LED	1	Indicates prayer-allowed time
220Ω Resistors	2	Limits current for LEDs
Piezo Buzzer	1	Audio alert during restriction
Push Buttons	4	Set start/end times
Breadboard & Jumper Wires	1 set	For connections

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🔧 Working Principle

1. RTC tracks the real-time clock continuously.
2. LCD displays the current time and prayer status.
3. Push buttons allow users to set restricted (Makruh) hours.
4. EEPROM stores user data even after power loss.
5. When current time matches Makruh range:
   • 🔴 Red LED ON
   • 🔔 Buzzer activated
   • LCD shows “Restricted Time”
6. Otherwise:
   • 🟢 Green LED ON
   • Buzzer OFF
   • LCD shows “Prayer Allowed”

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🧠 Technical Details

• RTC (DS3231): Temperature-compensated, high precision, battery-backed clock
• EEPROM: Stores Makruh times persistently
• LCD (I2C): Reduces wiring complexity
• Microcontroller Logic: Compares current vs. restricted times in real time

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🧩 Design Trade-offs

Aspect	Consideration
⏱️ Accuracy vs. Power	RTC provides precision while conserving power
💸 Cost vs. Performance	Arduino Uno chosen for affordability and reliability
🧍 User Simplicity vs. Complexity	Button interface keeps it beginner-friendly

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🧪 Implementation & Validation

• ✅ RTC and LCD synchronization verified
• ✅ LED & buzzer tested for correct response
• ✅ Button input and override confirmed functional
• ✅ EEPROM successfully retained settings post power cycle

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📊 Multidisciplinary Integration

Field	Application
Electronics	RTC, EEPROM, LED, buzzer integration
Software	Time logic, storage, and I/O handling
System Design	Reliability, low power, usability

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🌱 Ethical & Sustainable Design

• Supports religious practices with inclusivity and neutrality.
• Designed for ease of use and accessibility.
• Low power consumption supports sustainability.

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🧭 Project Development

Phases:

1. 🔹 Component selection & circuit design
2. 🔹 Software development & debugging
3. 🔹 Integration & validation
4. 🔹 Documentation & presentation

Tools Used:

• Arduino IDE
• Proteus Simulation
• Libraries: Wire.h, RTClib.h, EEPROM.h

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🖥️ Circuit Diagram

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🧰 How to Run

1. Clone the repository

   git clone https://github.com/IFTY25/Arduino-Time-Controlled-LED-System.git