Hello, I’m Huang Xin. This is my practice book: notes, projects, and learning to code with AI.Hello, I’m Huang Xin.This is my practice book:notes, projects, andlearning to code with AI.

The first page

Solar yield calculator

Estimates how much energy a fixed solar panel makes in a day, from the sun’s position and a clear-sky model (no weather, shading or losses). Written as a Python library with a FastAPI service, then ported to TypeScript so it runs in the browser here.

Python, FastAPI, TypeScript

This website

A bilingual personal site built with Astro and TypeScript. Notes are Markdown files, and every page is generated once per language.

Astro, TypeScript