So, my ideal target is to build a water powered AC generator that when refined could possibly be fitted into drainpipes and create a household source of energy everytime somebody uses water. My first model is a bit crude relative to my final goal but it conveys the principal that when developed, should work as more or less as I have described.
A generator works by a magnetic field inducing a voltage into a coil of wire, which can be done by turning the magnet causing the coil to continuously pass throught a magnectic field. A water powered wheel can be used to turn the magnet and thus create an electrical current which can be stored in batteries.
I have made a generator with some flaws, it has not worked as I first expected it to and that is because of a few easily corrected factors.
In order to refine the model, I need a stronger and more concentrated magnetic field, this can be acheived by using an iron nail intead of the thin steal rod I which would concentrate the field and also a stronger magnet. I also would need a longer length of copper in order for my coil to have more turns and become a more powerful inductor.
Also, a better casing structure would improve it by holding the magnet as close as possible to the coil without  them touching.

Power Output

I have chosen to hook my device up to a 6 volt light bulb although my final device will be used to charge batterys. The reason I went with a light bulb instead of the battery charger is simply because it cost far to much to buy a battery charger and pull it apart. So I have reasearched into solar powered battery chargers and found that to charge an AA battery you only need a small amount of voltage. So if i can make my device run a 6V light it should easily be able to charge 1-2 batterys at one time.

first attempt at generator

This is my first attempt at making a generator.. It dosent have the copper wire on it yet as it is expensive to buy and I dont have enough to be wasting it on my first attempt. this model was just to see how it would go together. basically it has the magnet in the middle which is attached to the metal rod you can see sticking out the side, so when you twist the metal rod the magnet inside spins aswel. To complete this model I simply need to put the copper wire on and connect it to whatever it is I want to go. The final will look a bit more professional and will be attached to a piece of drain pipe with the turbine in the middle.