All Works
19 projects, research, and publications
GES — Ground Effect Stabilizer
Individual Research
Onboard-sensor-based feedforward estimation of ground effect over irregular terrain, comparing machine learning and analytical models for multirotor flight.
Ground Effect, Flight Dynamics, Machine Learning, Multirotor
DDF — Drone Drop Finder
Individual Research
Probabilistic drone crash analysis using a C# / .NET rigid-body simulator and a C99 lookup-table library for embedded prediction.
C99, C# / .NET, Monte Carlo Simulation, Rigid-Body Dynamics, Embedded Systems
Extreme Environment Drone Firmware
Individual Project
STM32-based drone firmware developed for extreme-environment research experiments, including embedded sensing and experiment integration.
Drone Firmware, STM32, C, Embedded Systems
Samara Autorotation Descent Research
Individual Research
Samara-inspired emergency descent with asymmetric blade pitch, cyclic flap guidance, a C/Python simulator, and an STM32 control-circuit design.
Autorotation, C / Python, Cyclic Control, STM32, SolidWorks
IMU Integration & Accumulated Error
Individual Research
C quadrotor simulation comparing Euler, trapezoidal, and Simpson integration under an MPU6050-inspired noise model, with Python Monte Carlo analysis.
C, Python, IMU, Numerical Methods, Monte Carlo
FPV LiPo Thermal Runaway Guard
Individual Research
Battery-state estimation and adaptive output-limiting research using a 1RC equivalent circuit, five-state EKF, Arrhenius model, NASA discharge data, and an FPV simulator.
C11, Python, EKF, Battery Modeling, Simulation
CanSat — PCB & Firmware
Team Project — PCB & Firmware
PCB and firmware development for a two-tier CanSat system, including STM32 mother-unit control and ATmega328 child-unit firmware.
CanSat, KiCad, STM32, C, C++, CRSF
Cutist
Individual Project
An adaptive Pomodoro-style study assistant that adjusts session timing to focus patterns, presented at the IEEE SSCS Arduino Contest.
Arduino, IEEE SSCS, Embedded Systems
Custom BEC PCB
Individual Project
A custom battery eliminator circuit (BEC) board designed in KiCad and fabricated through JLCPCB for regulated power delivery in flight systems.
KiCad, PCB Design, JLCPCB, Power Electronics
Y-Zipper Drone Wireless Charging Alignment
Individual Project
A Y-zipper-based mechanical alignment guide for drone wireless charging pads, built for the Nobel 100x100 competition.
Wireless Charging, Mechanical Design, Drone Infrastructure
Safe Fire
Founder
An IoT device that automatically removes a fire extinguisher's safety pin in an emergency, cutting critical response time during a fire.
IoT, Fire Safety, Startup
BuildIt
Founder
An educational platform that fixes the code-review skill gap from AI-assisted ("vibe") coding, teaching top-down from real code to review fundamentals.
EdTech, Web Platform, Code Review
레지스터부터 시작하는 MCU 개발
Author — 이무원
A book on register-level MCU development, covering memory maps and GPIO through clocks and interrupts.
MCU, Embedded Systems, Technical Writing
STM32 LL Driver Article Series
Author
A technical article series on writing low-level (LL) drivers for STM32 microcontrollers, from register-level fundamentals to practical peripheral drivers.
STM32, Technical Writing, LL Drivers
IESBJ
Founder & Operator
An open-access publishing platform for embedded systems, hardware design, and low-level software research, built and operated by just_grassy.
Technical Journal, Community, Publishing
Borderless
Team Project — Hackathon
A hackathon prototype bringing market-entry research, scenario comparison, bilingual workflows, and expert collaboration into a workspace for Korean startups exploring international expansion.
Hackathon, AI, Product Development, Bilingual Workflows
Delibot
Team Project — STM32 Firmware
An indoor last-mile delivery robot built on STM32 (mixed LL/HAL) and Raspberry Pi, using BNO080 IMU and encoder-based localization, with elevator integration for multi-floor delivery.
STM32, Raspberry Pi, BNO080 IMU, Robotics, nucode
FTC Decode
Team Project
Competing in the FIRST Tech Challenge (FTC) Decode season, building and programming a competition robot.
FTC, Robotics, Competition
cbgpu
Team Project
An all-in-one school life platform — GPU rental and server deployment alongside class timetables, self-study room applications, meal menus, discussion boards, study groups, and voting, all in one place.
Platform Engineering, GPU Infrastructure, School Life