DarkPlug

Developer Peter Szentkiralyi has built Darkplug, a tool that turns an iPhone and an inexpensive smart plug into an f-stop timer for photographic darkroom work. The setup uses the phone to control enlarger exposure times through the plug, replacing dedicated darkroom timers that can cost far more. The project is drawing attention on Hacker News, where hobbyists are discussing the approach and its appeal to amateur film photographers.