Hi, I’m Bijaya

“Every engineer knows the feeling: spotting a broken process or quiet frustration others accept. For those of us driven to build, that small irritation becomes impossible to ignore.”

My Recent Projects

Engineer's Fireworks

Description

I made this as a fun project in which bit-banging drives 3 I2C displays using an Arduino Mega. The capacitors were given 25 volts on opposite poles to achieve dielectric breakdown. 5V relays were used to drive the current to the capacitors.

Demo

Airmail- The New Mail

Description

I, along with my team at WildAnt Labs, designed AirMail, a kiosk-based digital mailbox system that replaces multiple mailboxes in an apartment building with one secure, smart kiosk. Each resident has a personal, PIN-protected digital mailbox to receive mail and packages. The system allows recipients to easily opt out if they’ve moved out, reducing misdelivered and unwanted mail. The prototype is built using a Raspberry Pi and a touchscreen interface with Kivy, creating a more sustainable and secure way to manage everyday mail.

Demo

Restroom Alert System

Description

This project focuses on improving restroom maintenance efficiency by instantly alerting janitors when attention is needed.

Anyone using the restroom can press a button to send an alert directly to the janitor’s station or to their mobile phone. I also developed a dedicated mobile app that receives and displays these alerts in real time.

The system uses a Sub-GHz long-range radio module as the sender node, with an ESP32-C6 as the microcontroller to ensure reliable and low-power communication.

If you’d like to explore the app or learn more about the system, feel free to connect with me on LinkedIn.

Demo

Eternity Beats

Description

I built this project on Valentine’s Day with a special idea in mind – to capture the heartbeat of your loved one and preserve it in a meaningful way.

The system records the heartbeat pattern and then replicates that rhythm by blinking an LED in sync with the beat. At the same time, it displays a live ECG-style waveform on a 0.96″ I2C OLED display, visually mimicking the heart’s electrical signal.

The goal was to create something that combines emotion and engineering, turning a heartbeat into a lasting, interactive memory.

Demo

Tic_Tac_Toe Hardware

Description

I was learning Object-Oriented Programming (OOP) in Python and built a Tic-Tac-Toe game as practice. After completing the software version, I decided to bring it to life in hardware.

I designed all the components in Fusion 360, 3D printed the enclosure and parts, and used a Raspberry Pi Pico W as the microcontroller. Since I needed more GPIO pins, I added an MCP23017 port expander. In total, the system uses:

18 GPIO pins for LEDs
9 GPIO pins for push buttons
4 GPIO pins for the SPI display

If you’d like to replicate the project and need the STL files or source code, feel free to message me on LinkedIn.

Demo

Automated Toilet Seat

Description

I developed an Automated Toilet Seat Module designed to keep the seat always up by default. The system automatically raises and maintains the seat position after each use, helping maintain cleanliness and reduce contact with contaminated surfaces. This project combines a simple mechanical design with automation to solve a real, everyday problem in public hygiene.

Demo

Factory Smoke Liquifying Machine - 2021

I developed the Smoke Liquefying Machine (SLM) to convert industrial smoke into valuable chemical by-products. The system uses a three-phase process: first, a high-voltage electrostatic force separates black carbon particles, dissolving them in turpentine to create a usable hydrocarbon solution. Second, toxic gases are neutralized using Platinum-Rhodium/Palladium catalysts that reduce Nitrogen oxides and oxidize other hydrocarbons and Carbon Monoxide. Finally, remaining acidic gases like Carbon Dioxide and Sulfur Dioxide are converted into various acids (e.g., Carbonic Acid and Sulfuric Acid). These acids are then reacted with Sodium Hydroxide to yield valuable sodium salts (like Sodium Carbonate and Sodium Sulfate) through fractional crystallization. This process is designed to be economically convenient for all industries, effectively reducing pollution while creating new raw materials.

Demo

Automated Mechanical Bell - 2019

To solve the scheduling inconsistencies, my team and I designed and implemented a mechanical automated bell system. This solution utilized an Arduino microcontroller for precise timing logic and a motor driver circuit to reliably power and control the main bell mechanism. By automating the system, we successfully created a setup that rings the bell at the exact, pre-programmed time for every period and class interval. This project eliminated human timing errors, restoring predictability and efficiency to the daily school schedule

Demo

The Robotic Tree - 2017

I conceptualized and constructed a completely new project: the Robotic Tree, the first robot ever built directly onto a live tree. This unique installation transformed the tree into an interactive advocate capable of speech. The robot was engineered to talk and actively request people to stop cutting trees, directly communicating a crucial conservation message. By merging robotics with environmental science, the project created a highly personal and unforgettable experience for every passerby, dramatically increasing awareness and generating significant public engagement on the issue of deforestation.