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  • Electrical and Electronic Engineering, Faculty of Engineering, University of Jaffna
  • Sri Lanka
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sachinthagayajith/README.md
Sachintha Gayajith Embedded Systems Engineer
📱
+94 75 955 4613 		📧
[email protected] 		💼
LinkedIn Profile 		📍
Chilaw, North Western Province, Sri Lanka
Typing SVG

🙋‍♂️ About Me

👨‍💻 Profile Coding Fresh Electrical & Electronic Engineering graduate with hands-on experience in embedded systems development, firmware design, and hardware prototyping. 🎓 Education B.Sc. Engineering (Hons) Electrical & Electronic Engineering University of Jaffna (2021 - Present) 💼 Experience Electronics Engineering Intern 3S Fabrication Pvt Ltd (Feb - Aug 2025) 💡 Passion Developing clear and reliable embedded solutions for cutting-edge system design. Strong interest in electronic circuit analysis and mathematical modeling to deeply analyze and predict system performance. 🎯 Core Interests 🚀 Currently Working On

🛸 Autonomous Flight Control - Quadcopter navigation with fault detection 💾 Firmware Libraries - One-Wire protocol implementation for EEPROM ⚡ IoT Solutions - Smart power monitoring systems 🔬 Signal Processing - ADC/DAC converter design & filter implementation 🧠 Deep Learning - Neural networks for robotics applications
💬 Ask Me About

🛠️ Tech Stack & Skills 💻 Programming Languages

🎛️ Microcontrollers & Boards

🔌 Protocols & Communication

🌐 IoT & Cloud

🤖 AI/ML

🔧 Design & Simulation Tools

⚙️ Development Tools

🚀 Featured Projects

🛸Safe Navigation System for Quadcopter Propeller Failure

Final-Year Research Project - Designed and implemented a navigation system for quadcopters that enhances stability during propeller failure by developing real-time fault detection algorithms using gyroscope, accelerometer, and barometer data. The system ensures safe landing and maintains control even under critical failure conditions.
Technologies Used:

Key Features: PID Control Algorithms • IMU Sensor Fusion • Flight Dynamics Modeling • Real-time Fault Detection • Autonomous Stabilization

💾 AT21CS01 EEPROM Library Development

Internship Project at 3S Fabrication - Developed and implemented firmware in C++ for ESP32 to enable reliable read/write operations with the AT21CS01 EEPROM using the One-Wire protocol. Conducted oscilloscope-based timing analysis and applied low-level bit-banging techniques for protocol generation. Designed a custom PCB in Eagle CAD and developed the mechanical enclosure in SolidWorks to produce a complete embedded system solution.
Technologies Used:

Key Features: One-Wire Protocol Implementation • Oscilloscope Timing Analysis • Bit-Banging Techniques • Custom PCB Design • 3D Enclosure Design • Firmware Library Development

⚡ Smart Power Monitoring System

IoT Course Project - Simulated a smart home power monitoring system using ESP32 and the ADE9153A power monitoring IC. Implemented MQTT protocol for real-time power consumption monitoring on a Node-RED dashboard, and integrated an automatic power cutoff mechanism when usage exceeded predefined thresholds. The system enables remote monitoring and intelligent power management for residential applications.
Technologies Used:

Key Features: Real-time Power Monitoring • ADE9153A Power IC Integration • MQTT Protocol • Node-RED Dashboard • Automatic Power Cutoff • IoT Cloud Integration

📊 A/D and D/A Converter System Design

Analog Systems Project - Designed and implemented an Analog-to-Digital and Digital-to-Analog converter system for low-frequency signals (0–25 Hz) using a 2-bit uniform quantization scheme. Developed a 6th-order Butterworth anti-aliasing filter in LT-Spice and validated its performance through both simulation and breadboard hardware testing. Achieved quantization-limited performance while minimizing bitrate to 140 bps, with aliasing and in-band distortion kept below the noise floor.
Technologies Used:

Key Features: 6th-Order Butterworth Filter • 2-bit Uniform Quantization • LT-Spice Simulation • Hardware Validation • 0-25Hz Signal Range • 140 bps Bitrate Optimization

🔐 555 Timer-Based Electronic Code Lock Circuit

Entry-Level Electronics Project - Designed and simulated an electronic code lock circuit using a 555 timer IC. Transitioned to KiCad for entry-level PCB design, focusing on precision, efficient prototyping, and reliability. This project provided hands-on experience with analog circuit design, PCB layout, and practical assembly techniques including soldering and component placement.
Technologies Used:

Key Features: 555 Timer IC Circuit • Proteus Simulation • KiCad PCB Design • Precision Layout • Soldering Techniques • Entry-Level Project

📊 GitHub Statistics
🔥 Contribution Stats & Streaks

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💻 Most Used Languages

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⚡ Recent Activity

🎯 What I'm Up To

🔭 Working on autonomous flight control systems 🌱 Learning RTOS and advanced control algorithms 👯 Open to collaborate on embedded systems and IoT projects 💬 Ask me about firmware development, PCB design, and signal processing ⚡ Fun fact: I love mathematical modeling to predict system performance

📫 Let's Connect!

💡 "Building embedded solutions one bit at a time" 💡

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    Arduino library for AT21CS01 1-Wire EEPROM with energy harvesting capability. Includes verified timing implementations and practical examples for load cell calibration.

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  2. sachinthagayajith sachinthagayajith Public

    Hello world ! this is my profile.

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