Navigation Device for Visually Impaired

For this Computer Engineering capstone project we combined knowledge from past courses like Software Engineering, Real-Time Operating Systems. We designed a belt using a Raspberry Pi, Arduino, UltraSonic sensors and DC motors to aid visually impaired with indoor navigation. The belt performed two important functions: path navigaiton to get the wearer from one point in a building to another, by downloading the building maps. It also helped to avoid obstacles and detect staircases and reroute to an elevator if possible. You can access the source code for the RTOS on Github.

MIPS CPU

Designed a MIPS CPU that executes a simple ASM Program, from scratch. Used a Spartan FPGA to test the CPU. Started by designing and developing a simple and functional Arithmetic & Logic Unit (ALU). Then built a data-path and control unit, on top of the ALU to execute a complete program of MIPS instructions. Finally, made optimizations such as re-use of components for multiplication & shift operations, as well as a single adder for multiple operations. Also implemented error and exception handling, as well as holding the program counter for multi-cycle operations. This is the repository for the VHDL source code.

Socket Programming Client-Server Program

Implemented a client server socket program with TCP/IP protocols for transferring files. The file is first read then split into short data-units (packets) which are sent by using stop-and-wait flow control. It was verified if the file has been sent completely and correctly by comparing the received file with the original file. The performance of the protocol was measured for various error probabilities and compared with performance for error-free scenario.

Language Learning Flashcards

A web database application - a flashcard based language-learning utility enabling learners to optimize their practice time. Designed relational schema, entity-relationship diagram, developed attractive & responsive web app for the interface with a powerful search. Technologies used: Python, SQLite3, JavaScript, HTML/CSS, BootStrap.

Software Engineering Project: To-Do List Manager

Architected, developed, tested & documented this user-friendly desktop app to manage appointments and schedules. Technology used: C++, VisualStudio.

Line-Tracking Robot

Design, implementation and system integration of an autonomous vehicle in a team of 3. Robot can sense and follow (using LDR and LED) a curving black road on a white surface. It can make turns, move forwards or backwards and navigate slopes as well. The 'brain' of the sub-system is a PIC Microcontroller (PIC16F877), programmed with the decision-making logic of the robot. The motion system consists of DC motors used to power the wheels. These 3 sub-systems were integrated together, tested, debugged and then tuned.

Hypermarket Inventory Control & Monitoring System

Using data structures such as linked list, circular queues, circular double linked list, implemented the inventory system with features such as adding a new product, deleting products, locate top selling products/manufacturers, check expiry of products, re-stock products. Users can also use a powerful search feature to find a particular product Efficiency of algorithms using various data structures was measured using program execution time and then compared.

Power-Saving Shadow Activated PA System

Our circuit consisted of 4 parts: shadow detection, electric switch, audio amplifier & a volume controller. We used 2 Op-Amps, 1 LDR and 1 BJT. The Shadow Detector gives a low output when there is shadow on the LDR. When output from Part 1 is low, the BJT acts as an open switch and using a pull up resistor, Part 3 is driven. Part 3, the amplifier, picks up sound signals from a microphone and amplifies it to be played by a speaker, when the electric switch is on. Finally, volume control allows the user to adjust the volume level using a potentiometer that controls the output to the speaker.

Porting & Customizing FreeRTOS for Atmel Microprocessor

Washing Machine Payment System

PCB Elevator System

Smart Trash Receptacle

Writing & Blogging

I've been writing all sorts of things since I was a little kid - including poetry, short stories, articles for my school's newsletter and scripts for shows such as NUS Art Festival's (2014) closing show - Chudar - Shiva's Fire. More recently, I've contributed to DigitalSenior.sg. My preferred medium for blogging is Medium, haha. Recently, I discovered the joys of miro-blogging too, on Twitter!

Dancing

I've been training in Bharatanatyam (both Kalakshetra and Vazhuvoor styles) - an Indian classical art form since the age of 5. I started learning from Ms. Sundara Swaminathan, followed by Ms. Veena Ramakrishnan and Ms. Santha Bhaskar. I've performed in many of NUS' dance concerts since 2012, such as: Vriksha & Krishna Katha.

Leadership

Starting from high school, where I was Cultural Secretary of the Prefect Council, I've always been the type of leader to take initiative. This continued in college, where I started out as Secretary of NUS Indian Instrumental Ensemble, and was then voted as the Vice President for the next academic year. As VP, I was in charge of concert ticketing; I implemented successful ticketing strategies towards achieving full-house audience for Asura (2013), NUS Arts Festival 2014: Chudar – Shiva’s Fire (2014). I also took charge of performer-committee relations, guest artiste relations – established good rapport with artistes. I sourced for and liaised with potential sponsors; prepared effective & attractive marketing collaterals.

Veena

I'm a beginner with this instrument, having been learning only for a few days at a time whenever I'm Chennai. I'm as passionate about it as my other activities, though!