Instructables
Picture of how to make the simplest electric generator
i will show you how to make a generator easily.for this you will need common and cheap things.ihave given drawn pictures instead of real picture. so it may noybe so clear.with this generator you may not produce that much energy but still it may generate enough electricity to light up a led bulb.
 
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Step 1:

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you will need the following things:
1)an iron nail of 15-20 cm.
2)a card board sheet.
3)a strong magnet.
4)copper wire of 28-30 gauge.
5)insulative tape.
6)led bulb.

Step 2:

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cut two circles of 3-6 cm diametre from the cardboard sheet.and now make a hole in the centre so that the nail can be inserted init.

Step 3:

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now insert the first circle in the nail ,3 cm away from the head.now insert the other circle in the nail in such a manner that the 2nd circle is 3 cm away from the first one.and put a layer of insulative tape on it in between the circles.

Step 4:

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now on the insulative layer between the circles put some copper wires 1000-1500 times by spinnig.now bring the two ends out.

Step 5:

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now connect the two ends to a led bulb.

Step 6:

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now take a magnet keep it almost 3-5 cm away from the nails head.now star to move it in various ways .at one time in a certain type of move the bulb will start to glow.here i have shown circular movement.then any time you may light it with that move.ifit does not work then try by changing the poles of led.i am sure that it is a project that may give you a first prize in science fair.

if i make any mistake inenglish forgive me because i am from a non -english speakin coutry.i am argha halder from naogaon bangladesh.i study in class 7 in biam laboratory school naogaon. 
xxxSpox21 days ago
on an average basis....hw much power does it create?.???
argha halder (author)  xxxSpox20 days ago

It creates a very low ampere, but a decent voltage spikes around 3-4 volts sometimes. I didn't manage to check the spikes as I don't have an oscilloscope, but anything it produces is only powerful enough to light an led at most...

SHARMANATHAN3 months ago

Hi there. Can you kindly explain more on the turning.How does 2 ends coming out? i have used the cooper wire SWG18. it is quite thick and I can't make the LED function. Please explain it ASAP. Thank you..

argha halder (author)  SHARMANATHAN1 month ago

sorry for the late reply,, but when you wind the wire you get the start and end of the wire, so there are two ends.. The wire you used is quite thick, you might try using 26 gauge wires. and wind it at least 1000 times,, not less. Then try it again,, i hope it will work then,, Good Luck!!

SHARMANATHAN3 months ago

Hi there. Can you kindly explain more on the turning.How does 2 ends coming out? i have used the cooper wire SWG18. it is quite thick and I can't make the LED function. Please explain it ASAP. Thank you..

SHARMANATHAN3 months ago

Hi there. Can you kindly explain more on the turning.How does 2 ends coming out? i have used the cooper wire SWG18. it is quite thick and I can't make the LED function. Please explain it ASAP. Thank you..

sahaab noor7 months ago
Wow like this but can i know from where i can get strong magnet? Any online website

Look for neodymium-iron-boron magnets. You may not need one to demonstrate this project, but they're fun in their own right. For example, if you hold a cylindrical stack of them in your hand and move around, you can *feel* their interaction with the Earth's magnetic field. Additionally, you can demonstrate electromagnetic braking trivially and in a way that becomes immediately clear to anyone observing, by dropping a button magnet down a copper pipe with a slightly larger inside diameter than the diameter of the magnet. I've tried this: it took about 40 seconds for the magnet to drop through a 4 foot pipe.

You don't have to use a powerful magnet. Just any decent size ceramic magnet. You can find them at many different hobby stores, and they even sell these kind shown at Radioshack at a very low price.

sahaab noor7 months ago
Its great but i didnt understand step 6 pic!
argha halder (author)  sahaab noor7 months ago

sorry for that, in that step you just have to move the magnets near the nail in any pattern or movement. hope it helps

indigo4011 year ago
This is great! Keep up the good work :-)
argha halder (author)  indigo4011 year ago
THANKS .I HOPE MY INSTRUCTABLES WOULD BE EVEN BETTER.I HAVE GIVEN A INSTRUCTABLE ON MAKING A BAROMETRE.IT IS VERY EASY AND OF GREAT USE.SO I HOPE YOU WOULD SEE THAT.