I’m thinking of making a contraption that can produce electricity by the ‘wind’ cars produce while the car is moving. My idea is that i build some cylidrincal contraption that can be fitted onto the light poles on highways so that the wind of the cars can rotate the cylinder. The cylinder consists of two layers. The inner layer is fitted onto the light pole with magnets and the outer layer consists of the copper coil that rotates to cut the magnetic flux to produce an induced current. My question is is there any way to let the outtrt layer rotate freely and how to connect the wires so that it wont get entagled when the outer layer is rotating. Thanks!
Asked Richard Foo