Cheap Yellow Display

Interactive exhibition by Niklas Roy , Kikk Festival

I'm excited to share a project I've been working on: a web-based tool that lets you generate 3D printable models of real-world locations using OpenStreetMap data!

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t started with a message from a fellow Home Assistant user struggling with a blueprint. They shared a screenshot of their goal: an automation that snaps a photo when motion is detected and sends it—complete with an AI-generated description—as a mobile notification. I’d only used notifications for simple things, like knowing when a door was left open or the laundry was finished, but I really liked the idea of combining AI with real-time alerts. It didn’t take long to get it working, and I realized it was too useful not to share. So in this post, I’ll walk you through the exact setup, step by step.

For a small volunteer-run music festival we designed and built a custom decentralized NFC payment system. Due to the nature of the festival, the design of the system and hardware had some unique requirements: It had to be fully decentralized and not rely on network connection, which created some interesting security challenges. We also developed custom hardware terminals (based on ESP32) to be used at point-of-sale.