Electrical Engineering Question

Task Assignment: Li-Fi Data Transfer System Mini Project

You are required to complete the Li-Fi Data Transfer System mini project fully and correctly, following all academic and technical requirements. The final submission must strictly follow the provided report template and include all necessary practical and simulation components.

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### 1. Objective

Develop a complete Li-Fi communication system capable of transmitting data using an LED as a transmitter and a photodetector as a receiver. The system should demonstrate reliable data transfer using a microcontroller-based implementation.

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### 2. Scope of Work

You must complete the following sections in detail:

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### 3. Components and Equipment

Prepare a complete list of all required components, including:

– LED (high brightness)

– Photodiode or LDR

– Microcontroller (PIC using MPLAB)

– Resistors and necessary passive components

– Breadboard and power supply

– Any additional modules (e.g., amplifier if needed)

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### 4. Circuit Design and Theoretical Background

#### 4.1 System Explanation

Provide a clear explanation of how the Li-Fi system works, including:

– Principle of light-based communication

– Modulation technique (e.g., ON/OFF keying)

– Role of transmitter and receiver

#### 4.2 Circuit Diagram

– Design and draw the full circuit using Proteus

– Clearly label all components

– Include both transmitter and receiver circuits

#### 4.3 Design Calculations

– Calculate resistor values (e.g., LED current limiting resistor)

– Include any required signal conditioning calculations

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### 5. MPLAB Code Implementation

– Write complete and clean MPLAB code (no screenshots)

– Include:

– Transmitter logic (data encoding via LED blinking)

– Receiver logic (signal detection and decoding)

– Ensure the code is well-structured and commented

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### 6. Proteus Simulation

– Build the full system in Proteus

– Verify:

– LED transmits data correctly

– Receiver detects and interprets the signal

– Include screenshots of simulation results

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### 7. Results and Analysis

– Provide clear screenshots of:

– Simulation results

– Hardware implementation (if available)

– Analyze:

– Signal reliability

– Effect of distance and ambient light

– Any observed limitations

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### 8. Conclusion

Write a concise conclusion covering:

– What the system achieved

– Key learning outcomes

– Practical applications of Li-Fi technology

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### 9. References

– Use APA 7th edition format

– Include textbooks, datasheets, and relevant research papers

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### 10. Additional Requirements

– Ensure the report is well-organized and formatted

– Use clear headings and technical language

– Avoid copying content; all work must be original

– Ensure all diagrams and codes are complete and functional

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### Expected Deliverables

1. Complete report (Word document)

2. MPLAB project files

3. Proteus simulation file

4. Screenshots of results and video .

5. Presentation

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### Important Notes

– The system must demonstrate actual data transfer, not just LED blinking.

– The receiver must correctly interpret transmitted data.

– Simulation and code must be fully functional.

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Complete the task with high accuracy and ensure all sections are technically correct and aligned with engineering standards.

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