SHUTTLE SHOOTER
Electronics and Communication Engineering – 3rd Year , College of Engineering Guindy, Anna University , Chennai
Work Accomplished
* Spearheaded the hardware development of a commercial badminton shuttle thrower by designing the main controller and wireless remote PCBs, integrating motor control, wireless communication, power management, and HMI into a unified embedded system.
* Architected a mixed-signal PCB around the RP2350B microcontroller, interfacing LoRa wireless communication, motor driver circuits, USB connectivity, external flash memory, and peripheral interfaces to enable reliable real-time machine control.
* Engineered the power management subsystem by implementing USB Power Delivery (USB-PD) negotiation using the CH221K PD controller to obtain a higher input voltage from USB-C, followed by high-efficiency buck converters and LDO regulators to generate stable 12 V, 5 V, and 3.3 V power rails for motors, logic, and communication modules.
* Designed and validated motor control hardware by integrating DC and stepper motor driver interfaces, generating PWM control signals, and verifying system performance using oscilloscopes during hardware bring-up.
* Developed an interactive Nextion HMI for real-time control of shuttle speed, feed frequency, machine orientation, and operating modes while validating serial communication between the display and embedded controller.
* Integrated LoRa-based wireless communication between the handheld remote and the main controller, enabling reliable long-range command transmission for responsive machine operation.
* Collaborated on hardware–firmware integration by validating SPI, UART, I²C, and GPIO interfaces, debugging peripheral communication, and performing end-to-end system testing to ensure stable operation of the complete embedded platform.
Smart Street Light Controller
B.E. – Electronics and Communication Engineering – 3rd Year , College of Engineering Guindy, Anna University
Work Accomplished
* Defined the system architecture for an IoT-enabled Smart Street Light Controller comprising a central controller and distributed node controllers for remote monitoring, control, and fault management.
* Designed custom RP2040-based hardware for both the main controller and node controllers, integrating SIMCOM A7672S LTE/GNSS, RFM95W (SX1276) LoRa, RS-485, UART, relays, and monitoring peripherals.
* Developed the power supply architecture with regulated 5 V and 3.3 V rails, including filtering, decoupling, and protection circuitry for reliable operation.
* Designed voltage and current sensing circuits for the node controllers and integrated an RS-485 energy metering interface for electrical parameter monitoring and fault detection.
* Engineered a modular dual-board architecture by interconnecting the square controller board and circular interface board using a custom edge connector, enabling reliable electrical connectivity, simplified assembly considering the space constraint.
* Integrated a 7-pin circular NEMA connector to provide a rugged field interface for power, communication, and external connections, ensuring reliable operation in outdoor street lighting installations.
* Completed schematic capture, created custom KiCad symbols and footprints, performed ERC and DRC verification, and progressed the PCB design for fabrication.
* Developed embedded firmware for GPIO, UART, SPI, RS-485, LoRa, LTE modem communication, relay control, and sensing modules, with testing.
* Established communication between peripherals including the RP2040, LoRa transceivers, LTE/GNSS modem, enabling modular firmware development and integration.
* Contributed to system integration planning, hardware-software co-design, and communication workflow for the complete embedded platform.
Universal DC Motor Controller
B.E Electronics and Communication Engineering – 4th Year , College of Engineering, Guindy
Work Accomplished
Spearheaded the end-to-end design and development of a Universal Motor Controller platform for automation applications including motorized gates, rolling shutters, curtain controllers, and industrial actuation systems, supporting intelligent control, safety monitoring, and remote operation.
Architected a high-performance embedded control system around the RP2350B microcontroller, integrating Ethernet, LoRa, sensor feedback, and motor drive subsystems to enable scalable industrial-grade automation and real-time control.
Engineered a robust power delivery architecture featuring a 24V input stage, high-efficiency buck conversion, and low-noise LDO regulation, providing reliable multi-rail power distribution for control, communication, and RF subsystems while optimizing thermal and electrical performance.
Designed a complete motor drive stage utilizing the DRV8323R gate driver and high-current MOSFET H-Bridge topology, enabling efficient PWM-based motor control, directional switching, and support for high-power DC motor applications.
Integrated long-range wireless communication using the SX1276 LoRa transceiver and wired network connectivity using the W5500 Ethernet controller, facilitating remote control, monitoring, and dashboard-based operation through TCP/IP communication.
Implemented sensor-based automation features through Hall-effect rotational feedback and IR obstacle detection, enabling position awareness, motion monitoring, safety interlocks, and enhanced system reliability during operation.
Developed the complete schematic and two-layer PCB layout in KiCad, including custom library creation, footprint assignment, ERC/DRC validation, power plane design, high-current routing, grounding strategies, and manufacturing-ready Gerber generation.
Collaborated on firmware-hardware integration by developing and validating GPIO, PWM, SPI, Ethernet, and communication drivers on the RP2350B platform, successfully demonstrating TCP-based command processing and embedded motor control functionality.
Universal DC Motor Controller
B.E Electronics and Communication Engineering – 4th Year , College of Engineering, Guindy
Work Accomplished
Spearheaded the end-to-end design and development of a Universal Motor Controller platform for automation applications including motorized gates, rolling shutters, curtain controllers, and industrial actuation systems, supporting intelligent control, safety monitoring, and remote operation.
Architected a high-performance embedded control system around the RP2350B microcontroller, integrating Ethernet, LoRa, sensor feedback, and motor drive subsystems to enable scalable industrial-grade automation and real-time control.
Engineered a robust power delivery architecture featuring a 24V input stage, high-efficiency buck conversion, and low-noise LDO regulation, providing reliable multi-rail power distribution for control, communication, and RF subsystems while optimizing thermal and electrical performance.
Designed a complete motor drive stage utilizing the DRV8323R gate driver and high-current MOSFET H-Bridge topology, enabling efficient PWM-based motor control, directional switching, and support for high-power DC motor applications.
Integrated long-range wireless communication using the SX1276 LoRa transceiver and wired network connectivity using the W5500 Ethernet controller, facilitating remote control, monitoring, and dashboard-based operation through TCP/IP communication.
Implemented sensor-based automation features through Hall-effect rotational feedback and IR obstacle detection, enabling position awareness, motion monitoring, safety interlocks, and enhanced system reliability during operation.
Developed the complete schematic and two-layer PCB layout in KiCad, including custom library creation, footprint assignment, ERC/DRC validation, power plane design, high-current routing, grounding strategies, and manufacturing-ready Gerber generation.
Collaborated on firmware-hardware integration by developing and validating GPIO, PWM, SPI, Ethernet, and communication drivers on the RP2350B platform, successfully demonstrating TCP-based command processing and embedded motor control functionality.
LED WALL FPGA CONTROLLER
B.Tech Electronics Engineering ( VLSI Design and Technology) – 3rd Year , CEG , Anna University
Work Accomplished
*Understood the basic system level working of synchronous and asynchronous video wall controllers.
*Understood how and why FPGA is used in such systems : to handle data synchronization across different panels with variable dimensions.
*Studied the features of HDC16L and R712: how features help in day-to-day life and differentiated inevitable features from the rest.
*Looked the way in which panels have to be connected(in terms of orientation and connection of data cables and power cables).
*Understood how HDC16L eliminates the need for a receiving card.
*Used HD Player software and came to know about the importance and information of a configuration file in powering up the panels.
*Powered up the panels and tested it for various graphics, text, photos and videos.
*Analysed the waveforms of R1,G1,B1,R2,G2,B2,CLK,LAT,OE,A,B,C. Verified the synchronized waveform.
*Found out that the row address is not a simple binary counter.
*Explored the need of different kinds of row addressing and found the techniques of brightness modulation – PWM, BCM and scrambled PWM. Couldn\'t match any of the expected brightness modulation waveform with the actual waveform.
*So, looked at the ICs in the P4 panel and outlined its working.
*Tried analyzing P10 led panel and WF2 – which perfectly replicated the expected waveform.
*Used Arduino UNO to power up the led panels with 8 different colors and so, ensured the actual dataflow from the controller to the panel.
*Interfaced with PYNQ Z2(both the Jupyter notebook and the HDL part) in order to mimic the functionality of HDC16L.
VOICE BASED WAKE WORD CONTROLLER AND HOME AUTOMATION TOUCH PANEL
BE(ECE) – 3rd Year , ANNA UNIVERSITY,MIT CAMPUS
Work Accomplished
1. Voice-Based Wake Word Controller (\\\\\\\"Hey Sigma\\\\\\\")
Developed a CNN-based wake-word detection model for the custom wake phrase \\\\\\\"Hey Sigma.\\\\\\\"
Collected and preprocessed positive and negative voice samples for model training.
Trained and optimized the wake-word model using TensorFlow/Edge Impulse workflow.
Integrated the trained model with the embedded system for real-time voice activation.
Debugged false triggering by increasing negative samples, optimizing detection thresholds, retraining the model, and validating performance under various noise conditions.
2. Touch Panel Hardware Design
Designed the complete Home Automation Touch Panel schematic in KiCad.
Developed the PCB layout, including RP2040, LoRa module, power supply, touch display interface, and peripheral circuits.
Performed PCB routing, design rule verification, and generated the final 3D PCB model for hardware validation.
3. Touch Display Firmware
Developed the Touch Panel firmware for the HMI display.
Designed appliance control screens with intuitive navigation and user interaction.
VOICE BASED WAKE WORD CONTROLLER AND HOME AUTOMATION TOUCH PANEL
BE(ECE) – 3rd Year , ANNA UNIVERSITY,MIT CAMPUS
Work Accomplished
1. Voice-Based Wake Word Controller (\\\"Hey Sigma\\\")
Developed a CNN-based wake-word detection model for the custom wake phrase \\\"Hey Sigma.\\\"
Collected and preprocessed positive and negative voice samples for model training.
Trained and optimized the wake-word model using TensorFlow/Edge Impulse workflow.
Integrated the trained model with the embedded system for real-time voice activation.
Debugged false triggering by increasing negative samples, optimizing detection thresholds, retraining the model, and validating performance under various noise conditions.
2. Touch Panel Hardware Design
Designed the complete Home Automation Touch Panel schematic in KiCad.
Developed the PCB layout, including RP2040, LoRa module, power supply, touch display interface, and peripheral circuits.
Performed PCB routing, design rule verification, and generated the final 3D PCB model for hardware validation.
3. Touch Display Firmware
Developed the Touch Panel firmware for the HMI display.
Designed appliance control screens with intuitive navigation and user interaction.
VOICE BASED WAKE WORD CONTROLLER AND HOME AUTOMATION TOUCH PANEL
BE(ECE) – 3rd Year , ANNA UNIVERSITY, MIT CAPMUS
Work Accomplished
1. Voice-Based Wake Word Controller (\"Hey Sigma\")
Developed a CNN-based wake-word detection model for the custom wake phrase \"Hey Sigma.\"
Collected and preprocessed positive and negative voice samples for model training.
Trained and optimized the wake-word model using TensorFlow/Edge Impulse workflow.
Integrated the trained model with the embedded system for real-time voice activation.
Debugged false triggering by increasing negative samples, optimizing detection thresholds, retraining the model, and validating performance under various noise conditions.
2. Touch Panel Hardware Design
Designed the complete Home Automation Touch Panel schematic in KiCad.
Developed the PCB layout, including RP2040, LoRa module, power supply, touch display interface, and peripheral circuits.
Performed PCB routing, design rule verification, and generated the final 3D PCB model for hardware validation.
3. Touch Display Firmware
Developed the Touch Panel firmware for the HMI display.
Designed appliance control screens with intuitive navigation and user interaction.
Home Automation Hub Controller
BE ECE – 3rd Year , Madras Institute of Technology,Chennai
Work Accomplished
*Designed and implemented an AI-enabled Edge Home Automation Hub that enables secure, real-time device control and local AI processing, reducing dependence on cloud connectivity while improving user privacy and response time.
*Built a heterogeneous embedded hardware platform by integrating the Rock 5T SBC with ESP32-S3 and ESP32-H2 microcontrollers, enabling seamless coordination between edge AI, wireless communication, and smart device control.
*Developed a multi-protocol communication framework supporting Ethernet, Wi-Fi, Bluetooth LE, Thread, Zigbee, LoRa, and LTE, allowing reliable interoperability across a wide range of smart home devices.
*Created a robust mixed-signal PCB by carefully optimizing component placement, high-speed routing, power distribution, and grounding strategies to ensure reliable system performance and minimal electromagnetic interference.
*Integrated an XMOS-based audio subsystem with multiple MEMS microphones, supporting voice capture, acoustic echo cancellation (AEC), and wake-word detection for hands-free smart home interaction.
*Engineered an efficient power architecture using high-efficiency DC-DC converters and multiple regulated power rails, ensuring stable operation of processing, wireless, and audio subsystems under varying load conditions.
*Validated hardware communication interfaces including SPI, I²C, UART, I²S, USB, and Ethernet, ensuring reliable data exchange between the Rock 5T, ESP32 modules, LTE modem, LoRa transceiver, and peripheral devices.
*Performed complete hardware development activities including component selection, schematic design, PCB layout, design rule verification, and prototype validation using KiCad while following industry-standard PCB design practices.
*Worked closely with embedded software engineers to establish reliable firmware-hardware integration, enabling seamless communication between AI applications, peripheral devices, and wireless communication modules.
Contributed to the development of a scalable edge-computing platform capable of supporting future Matter-compatible smart home ecosystems with secure local automation and intelligent voice assistance.
RFID READER AND GIGABIT ETHERNET PORT FOR RK3328 SBC
Electronics and Communication Engineering – 3rd Year , College of Engineering Guindy
Work Accomplished
-Designed the complete schematic and PCB layout for a 13.56 MHz RFID Reader using the MFRC522 RFID transceiver and RP2040 microcontroller, integrating SPI communication, USB programming interface, LEDs, buzzer, reset circuitry, and regulated power supply.
-Developed a compact two-layer PCB layout by implementing proper component placement, signal routing, decoupling capacitor placement, and PCB design guidelines to ensure reliable hardware performance.
Performed component selection, passive component calculations, footprint verification, and datasheet analysis while validating the design against manufacturer reference schematics before PCB implementation.
-Designed the Gigabit Ethernet subsystem for an RK3328-based Single Board Computer, integrating the RTL8211F-CG Gigabit Ethernet PHY, RJ45 connector with Ethernet magnetics, clock generation, reset circuitry, and power interfaces.
-Implemented Ethernet differential pair connectivity and verified schematic compliance using RK3328 hardware reference designs and Gigabit Ethernet design recommendations.
-Strengthened practical skills in embedded hardware design, schematic capture, PCB layout, datasheet interpretation, component selection, hardware debugging, and KiCad-based electronic product development.
5V 4A powersupply in flyback topology
VLSI design and technology – 3rd Year , CEG anna university
Work Accomplished
Successfully designed and developed a 5V, 4A isolated AC-DC power supply based on the Flyback topology using the DK125 PWM controller IC. I was involved throughout the complete product development cycle, from understanding the design requirements to delivering a fully functional hardware prototype. My responsibilities included designing the circuit schematic, selecting suitable components, calculating power stage parameters, designing the PCB layout, and developing the hardware board.
Analyzed the performance of the flyback converter by measuring output voltage regulation, load regulation, efficiency, and output ripple under different operating conditions. I also debugged hardware issues, optimized the feedback and protection circuits, and ensured stable operation during continuous load testing. The completed board met the required 5V, 4A output specifications and provided hands-on experience in SMPS design, Flyback converter implementation, PCB development, hardware debugging, power electronics testing, and product validation.
Shuttle Shooter
BE ECE – 3rd Year , Anna University , Guindy Campus
Work Accomplished
* Spearheaded the hardware development of a commercial badminton shuttle thrower by designing the main controller and wireless remote PCBs, integrating motor control, wireless communication, power management, and HMI into a unified embedded system.
* Architected a mixed-signal PCB around the RP2350B microcontroller, interfacing LoRa wireless communication, motor driver circuits, USB connectivity, external flash memory, and peripheral interfaces to enable reliable real-time machine control.
* Engineered the power management subsystem by implementing USB Power Delivery (USB-PD) negotiation using the CH221K PD controller to obtain a higher input voltage from USB-C, followed by high-efficiency buck converters and LDO regulators to generate stable 12 V, 5 V, and 3.3 V power rails for motors, logic, and communication modules.
* Designed and validated motor control hardware by integrating DC and stepper motor driver interfaces, generating PWM control signals, and verifying system performance using oscilloscopes during hardware bring-up.
* Developed an interactive Nextion HMI for real-time control of shuttle speed, feed frequency, machine orientation, and operating modes while validating serial communication between the display and embedded controller.
* Integrated LoRa-based wireless communication between the handheld remote and the main controller, enabling reliable long-range command transmission for responsive machine operation.
* Collaborated on hardware–firmware integration by validating SPI, UART, I²C, and GPIO interfaces, debugging peripheral communication, and performing end-to-end system testing to ensure stable operation of the complete embedded platform.
IP Speaker
BE(ECE) – 3rd Year , CEG , ANNA UNIVERSITY
Work Accomplished
-Spearheaded the end-to-end development of a commercial-grade Power over Ethernet (PoE) IP Speaker, successfully eliminating legacy PA cabling by delivering digital audio and 30W of power over a single network cable compliant with IEEE 802.3at standards.
-Architected a high-speed mixed-signal PCB integrating an ESP32-S3 microcontroller and W5500 Ethernet PHY, facilitating reliable, hardware-level TCP/IP offloading for real-time, low-latency audio streaming.
-Engineered a robust power management subsystem featuring Schottky bridge rectification and cascaded step-down buck converters (TPS54260, MP2315), achieving high energy efficiency and optimized thermal performance under load.
-Ensure signal integrity across mixed-signal layouts by performing precise differential pair routing and implementing dedicated analog/digital ground isolation, resulting in stable I2C/I2S bus communication and noise-free audio output.
-Integrated and tuned a TAS5805M Class-D digital amplifier, configuring I2S audio interfaces and internal DSP registers via I2C to deliver high-fidelity, low-distortion audio output.
-Collaborated on low-level firmware-to-hardware integration, validating SPI and I2C communication protocols between the ESP32-S3 and peripheral ICs to ensure synchronized system operation.
