VonHoltenCodes

Open-source development · retro hardware · self-hosted systems

A workshop, not a portfolio. Most of what lives here started as a problem with old hardware or a tool that did not exist yet — CRT test equipment, a Kaypro restoration, an X68000 power supply, accounting software, a laser-disc controller. The code is public; the running instances are below.

01 GitHub Telemetry

Public repos··

Total stars··

Followers··

Languages··

Querying api.github.com/users/VonHoltenCodes …

02 Repositories

Live from the GitHub API, ordered by stars then most recent push.

waitLoading repositories…

03 Deployed Projects

Applications and instruments running on this server.

live WeatherStar 4000+Emulation of the 1990s Weather Channel satellite unit subdomain tool OCR Document ToolSubcontractor document intake, extraction and status tracking php · auth tool Minkowski EmbeddingSpacetime interval visualiser js tool Lissajous GeneratorParametric curve plotter with oscilloscope output styling js tool CRT Test PatternsConvergence, geometry and purity patterns for tube calibration js tool World RadioGlobal streaming receiver on an interactive map js · leaflet auth Busy SignalMatrix LED status indicator controller php · auth

04 Archive

This site began as a kid-friendly project and that work is kept intact, not discarded.

API Integrations

NASA, USGS earthquake feed, Sky King and more — live third-party data.

Game Room

Moon Lander, Rivendell Run, Hangman, Minions Adventure, Combat Simulator.

Creation Station

Pixel art, colour mixer, avatar creator, neon liquid canvas, aquarium.

Kids Links

Curated learning, science, coding, maths and art resources.