Building this torch (flashlight) helps to understand how it is possible to transform mechanical energy into electricity. This type of transformation is achieved in most of our power plants.
This project reveals all the components of an electric generator. By using a small electric motor the 'other way round', it shows the difference between an electric motor and a dynamo
This crank flashlight works without the use of batteries that are costly and polluting. It also operates with an ultra bright LED bulb that is very energy efficient and has a lifetime of 100'000 hours!