8) u can use an electromotor from a car from the window rain cleanrs(i dont remember how u call them) and u mighta generate some 16 V if u find something to turna it fast and a current like 1-2 amps.....if it;s a good motor.....
the problem is that u got to make it run fast, maybe if it's windy
:lol:
8) or do something like i did with my cousins toy....
it was something like a water mill, a beach toy, u pores water and it turned a big weel quite fast...
what i did : i conected a 12V casseteplayer motor with a belt, and made some martian type of generator
it could only power a few leds, but it was funny building it......
and something very interesting what i realized at the physichs class, i inserted a copper wite into a flower pot and i tied a piece of aluminum paper to a leaf and ia mesured a voltage of about 350mV....
home i tried skething else , i gathered all my flowers, (my mother said i was crazy) :lol: :lol: and tied 40 m of wires and i got about 7 volts, and with a shortcircuit current of 35 mA.....
i powered a few LEDs, and it worked, but the energy dropped after a few hours... :cry: :cry: :cry:
u can try this and have fun.....