This is up there with one of my favorites from Hacker News: The Microhydro Plant https://news.ycombinator.com/item?id=6895582 https://news.ycombinator.com/item

This is up there with one of my favorites from Hacker News: The Microhydro Plant https://news.ycombinator.com/item?id=6895582 https://news.ycombinator.com/item?id=6895582 https://news.ycombinator.com/item?id=20075110 https://news.ycombinator.com/item?id=20075110 https://ludens.cl/paradise/turbine/turbine.html https://ludens.cl/paradise/turbine/turbine.html