The aim of the seminar is to give the participants the opportunity to get in touch with the basics of hydrodynamics, water harvesting and electrical machines and at the same time to get familiar with the tools and techniques required to build a small water generator for domestic systems. Participants will be able to get a brief introduction to the basics of construction such as familiarizing themselves with the basic tools of the machine shop, the construction of the generator (magnet placement and coil winding), the molds and polyester resins, the iron construction of the generator support, the iron construction of the hydro turbine housing, the assembly and adjustment of the generator and the printing of the turbine with a 3D printer.