A new type of hydroelectric unit with submerged blades that move side to side has been developed to generate electricity from flowing water without building large dams. This unit aims to harness mini/micro/nano hydropower while protecting natural ecosystems in rivers and forests. Through experiments and simulations, the researchers found that the yawing blades can effectively generate power in various flow conditions. This innovation could help promote the use of hydroelectric power in a more environmentally friendly way.