📸 DIY F-Stop Darkroom Timer - Turn your Cardputer-Adv into a professional lab tool 💡 This custom firmware was made by eniac1983, used Cardputer-Adv and Unit 2Relay combo, crammed almost all about the f-stop process into this thing, delivered high-end F-stop timing and exposure control at a fraction of the cost. 🎞️✨ • Paper development timer & print size compensation calculator 📐 • Two modes of test-strip creation (total and incremental) with custom number of test strips 🔢 • F-stop exposure timer with selectable fractions and base time ⚙️ 👉 See the project here: bit.ly/3PdpRH9 #M5Stack #CardputerAdv #Darkroom #FilmPhotography #DIY #MakerProjects #ESP32 #AnalogPhotography #FStopTimer