OK ...Here we Go again...man... I Love Contests. Some Day I found an Old style Bike lamp Powered by a Kind of Dinamo but it was broken, anyway I Buy It, and become to think what the heck to do with this stuff.
Step 1: The Flash Light
This kind of flashlight work with the action of a dynamo by the movement of the wheel, but it was broken so I dissassamble the whole thing an add a pair of Leds.