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 screw 4 M3 hex nuts 2 M3x25 flathead screws 9 2.6x8 self-tapping screws 1 LED diode or a 3/5 Volt bulb if you prefer 1 DC5V 200/250RPM single-axis TT motor (here)