Chen-Jui (Ray) Chang Portfolio
Chen-Jui (Ray) Chang Portfolio

Building hardware.
Understanding how it works.

I'm a Systems Engineering and Design student at UIUC. I work across mechanical prototypes, embedded control, and analysis software—with a focus on what happens when a design meets real hardware.

Robotics · Hardware integration · Testing
Ray's assembled 3D-printed gripper with a DS3225MG servo, gears, and jaw linkages
My physical prototype / Assembly and hardware integration

Selected projects

01 / PROJECTS
Ray's physical gripper assembly with servo and linked jaws

Embedded systems / Independent project

TouchLens gripper

ESP32 gripper with tested servo actuation and breadboard sensing. BLE firmware and a browser controller are prepared for testing.

My role: hardware integration and firmware.

Explore the gripper
VEX engineering notebook showing the physical robot prototype

Autonomous robotics / Team 10002X

VEX Robotics

Odometry, C++ motion control, and mechanical iteration documented in engineering notebooks.

My role: main programmer, later captain; mentor.

See code and notebook evidence
ANALYSIS PIPELINE
WAV recording
Signal measurements
Plots + session checks

Signal analysis / SE 498 team project

Audio Rate

Analysis dashboard for exercise breath-audio recordings and device-session checks.

My role: dashboard, signal processing, data analysis, and device connections.

Read about my contribution

Engineering experience

02 / EXPERIENCE
ExperienceWorkPeriod
Intelligent Matter Lab, UIUC
Prospective research involvement
Preparing for research with Prof. Wenjie Zhou’s group; technical work and assignment have not started.Upcoming
Honten Electronics
Manufacturing and prototyping intern
PLA fixture design, aluminum prototypes, CAD/CAM, Mastercam, and CNC setup troubleshooting.Jun–Aug 2025
Addlink Technology
Quality and failure analysis intern
M.2 PCIe SSD performance, compatibility, and thermal testing on PC and PS5.Jun–Jul 2023

More hands-on work

03 / PROJECTS

RC car reverse engineering

Fusion 360 model of a 1:24 4WD car: 40 components across 3 subassemblies, with tolerance checks, weight validation, and structural analysis.

UIUC SE Product Design Lab · Jan–May 2025

ThermaGlass

Temperature-controlled prototype integrating thermistor sensing, comparator logic, and PWM circuitry, tested with oscilloscopes and multimeters.

UIUC ECE 198 · Aug–Dec 2024

For project details or a discussion of internship opportunities, contact me.