Jack
Qiu

A four-wheel rover you drive from a web app in real time. Raspberry Pi onboard, PCA9685 PWM controller over I²C driving four continuous-rotation servos at 50 Hz, with a Socket.IO link to a Node server and a React control app. Per-wheel throttle thresholds, threaded drive loop, auto-stop watchdog.

MECH

4-wheel chassis, servo drive

ELEC

Raspberry Pi · PCA9685 · I²C @ 50 Hz PWM

FW

Python, threaded control loop

SW

Socket.IO · Node server · React teleop app

Instrumented swords that stream 6-axis motion — MPU6050 accelerometer + gyro sampled at 100 Hz — from a Pi over Socket.IO into a live game server, with a custom PCB for the hardware and OBS overlays for the broadcast. Physical dueling, scored in software, streamed live.

MECH

Instrumented sword props

ELEC

MPU6050 IMU · custom PCB · I²C

FW

Python telemetry @ 100 Hz

SW

Realtime game server · stream overlays

A powered mask engineered as a full SolidWorks assembly — intake chamber, exit chamber, top and bottom shells — 3D-printed from STLs and run by an Arduino. Designed for fit, print orientation, and assembly, not just looks.

MECH

SolidWorks assembly · 4-part shell · FDM print

ELEC

Arduino

FW

C/C++

SW

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My current software venture: a persistent pixel world where autonomous AI agents live, build, and trade — Next.js on Vercel, Supabase, and an agent runtime with live dashboards for world activity, capacity, and cost. The same prototyping loop, applied to an entirely virtual machine.

MECH

—

ELEC

—

FW

—

SW

Next.js · Supabase · LLM agent runtime