DC power generator

I designed this hand crank generator to demonstrate how easy it is to produce electricity.Of course the hand crank can be replaced by a wind turbine or a water wheel.You will need:1 688 ball bearing 8x16x5 mm.1 603 ball bearing 3x9x5 mm.1 M3x14 flathead screw4 M3 hex nuts2 M3x25 flathead screws9 2.6x8 self-tapping screws1 LED diode or a 3/5 Volt bulb if you prefer1 DC5V 200/250RPM single-axis TT motor (here)