Roman
Experiments that made it off the desk. What they do, how I made them, and the things I'd change next time.
Flashcards that open beside Claude Code while it works and get out of the way when it's done. Spaced repetition picks the card I'm about to forget, and Claude can write a course on any topic in about a minute.
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The next MusicStation step: an offline microSD player with local artwork, synchronized lyrics, physical buttons, playlists, and a path toward I²S audio.
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A watering tracker for my plants, built with Go, SQLite, and NFC stickers. Each sticker opens the right plant's page, and Telegram sends reminders when a watering is due.
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An ESP32-S3 and e-paper display that shows the song playing on my iPhone, including artwork, progress, and synchronized lyrics. The current version is a display prototype; later I want to turn it into a standalone offline player.
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My first robotic arm and my first serious 3D-printing project. I designed the parts in FreeCAD with Claude Code, printed and assembled them, then added camera and voice control.
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An ESP32-S3 recognizes an open hand or a closed fist from an OV7670 camera, then controls a brushless motor through an ESC. The camera processing and a roughly 10 KB model run on the board.
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I connected a cheap OV7670 camera to an ESP32-S3 without using a camera library. After a lot of register and timing debugging, it streamed 160×120 grayscale images at about 5 FPS.
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A small battery-powered temperature and humidity display built with an ESP32-C3, AHT10 sensor, and OLED. It wakes on touch, sleeps between readings, and cost less than €10 in parts.
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