I investigate, build, and learn.
I follow questions through software, systems, hardware, and observation. These selected records offer a few ways into the work: what I tried, what the evidence showed, and where the limits remain.
All work & notesFind the failing boundary
A silent board, a camera protocol, or a compatibility layer can hide several different problems. These investigations separate the observation from the assumption and record what actually worked.
- Hardware & robotics: From silent UART to a working NanoPi R2S
An unreliable serial path and a mismatched image hid a healthy board.
- Hardware & robotics: A local Android preview for my GoSure 3201
A local Android preview, with the camera’s stateful protocol and failed approaches kept in view.
- Software & systems: Building a Responses gateway with explicit limits
An archived gateway whose compatibility and security boundaries are part of the record.
Test models under constraints
Memory budgets, interrupted training sessions, and the gap between simulation and hardware make useful limits concrete. The outcomes here are specific to the devices and tests described.
- Hardware & robotics: A TinyStories model on my RP2040 board
A small language model trained, quantized, and run on a physical RP2040 board.
- Software & systems: GPT-124M from scratch: benchmarking and restart recovery
A small GPT training run made measurable and restartable, with a public base-model demo.
- Hardware & robotics: Robot: simulation to SO-101 hardware
Camera-guided simulation and learned control, kept distinct from measured hardware bring-up.
Make information visible
Maps and diagrams offer another way to investigate a system. These records cover map-loading work and recovered visual studies; the archived studies are not presented as live interactive tools.
- Maps & history: Making a four-province expressway atlas lighter
A partitioned map snapshot and measured reductions in the amount of data loaded.
- Science & mathematics: Calculus Visual Lab
Recovered studies of limits, slopes, and midpoint sums, with the verification boundary stated.
- Science & mathematics: Biology Diagrams
Cell and DNA drawing generators with preserved outputs and bounded implementation tests.
Look closely, keep a record
Not every question starts with a technical fault. A photograph, a family memory, or an old object can be worth following—and worth recording even when the result is uncertain or the idea is set aside.
- Photography: Above Qingshui Gong
Two photographs of an aircraft passing above a temple, and what they do and do not establish.
- Maps & history: Sugar from a soldier
A family memory tested against regional records, without claiming a verified match to the village.
- Hardware & robotics: An old flashlight, a new idea
A familiar flashlight inspired a toy concept that was shelved before anything was built.