A home automation light control system built as a practical exploration of Specification Driven Development with AI assistance. The full stack spans hardware through web: ESP32 microcontrollers serve as sensor nodes (PIR motion detector, push-button switch) and actor nodes (WS2812B addressable LED strip), connected to a Go backend that exposes a REST API and manages an MQTT broker for real-time device communication. An Angular web frontend provides manual control and live status monitoring.

Proportional seat distribution for committees, made simple.

CommitteeCalc computes how seats are distributed across parties for every possible committee size in one click — using the Sainte-Laguë/Schepers method as required by German election law. Enter your parties, set their vote counts, and instantly see the full distribution matrix. Ties are shown as a seat range rather than hidden behind a footnote. Results can be exported directly to Excel. Self-hosted, runs entirely in Docker — no cloud, no tracking, no dependencies beyond a browser.

Isolated Data Processing Engine

// details coming soon

Simple Digital Signage — effortless displays, powerful management.

SDS is a fully web-based digital signage platform that turns any browser-capable screen into a managed display — no native apps, no drivers, no remote desktop sessions required. Administrators configure content through a web interface; each display runs as a lightweight web application that pairs to your account with a single pairing code or a QR scan.

Upload images or multi-page PDFs, organise them into picture groups, and assign groups to displays in minutes. Time windows automatically show or hide content for specific events; a daily text overlay handles recurring announcements. Once paired, a display runs unattended indefinitely — session keys never expire.

Built multi-tenant from the ground up: each organisation manages its own content library, displays, and members in complete isolation. Contributor and Administrator roles, join requests, and organisation switching are all first-class features.