Egypt faces many challenges called Egypt's grand challenge including improving of alternative energy, dealing with the population growth and its consequences which causes the lack of sources of energy, and reducing and adapting to the effects of climatic change which is the riskiest problem in Egypt. Our project “knocking for power “aims to solve these problems. Our project is to generate electricity by opening and closing the door. We chose this idea because it is easy to implement and its results are high. Our project shows high results and achieves all design requirements. This website shows how we build our prototype and shows the results scientifically and professionally.