A 1kW hydroelectric power generator is under development and is the output we are aiming for in the future, currently, it is a few watts or a few dozen watts.” Called 3D-Pico Hydro Generator ...

It consists of two generators mounted on a single unit ... In March, Ricoh launched a pico-hydro generation system that can be used with factory drainage systems and irrigation canals.

The result is a cheap function generator you can build with a Pi Pico and a handful of resistors, which will probably cost you the grand total of $12. It readily outperforms, at least in regards ...