Hi friends,
This is my first Instructable!!!
"ELECTRICITY FROM WALKING",looks like a weird title!!.But it is true that you can generate electricity by just walking over.
The principle is very simple,when you apply a pressure on piezoelectric crystals electricity is developed over the crystal lattice!.
When you walk a pressure is applied to the ground ,utilising this pressure electricity is generated.
You can read the full details from
http://www.scribd.com/doc/22975115/Project-Building-Instructions-ELECTRICITY-FROM-WALKING
http://www.scribd.com/doc/22302487/Electricity-From-Walking

Step 1: Materials Required

Materials required:

Piezoelectric transducers(the thin speakers from the buzzers) - according to the area of the base

Diodes(1N4148 or any smaller diode) - no. of transducers used(one for each transducer)

Base - cardboard or any hard material

Cardboard - cut into small square pieces with side slightly longer than the diameter of the transducer

Soldering iron ,solder, wire strippers ,knives or utility blades,enameled copper wires.

Red and black coloured wires - desired length

Step 2: Soldering the Cells(transducers)

Take the cells and solder a stripped enameled wire followed by a diode.
Connect all the other wires in parallel with other cells.
Connect the wires from the diodes' cathode in parallel.
The red wire goes to the diode and the black to all the black wire from other cells.

Step 3: Arranging the Base

Cut the base to the required size.

Arrange the cells on the base with a small piece of cardboard in between the cells and the base.
The cardboard in between must have a small grove cut ,so that the wires soldered can be easily connected and this prevents the cells from breaking when an excess pressure is applied.

Step 4:

Cut another cardboard or any other hard material to the size same as the base and place it over the cells.Vollah! the project is ready to test!
Draw some graphics and stick it to the top cover to make it attractive.

Step 5: Testing

Connect the black wire to the wire that you have connect in parallel to the cells common wire.

Connect the red wire to the wire that you have connected in parallel from the diode.

Connect both the wire to a digital multimeter set to 20V range.
Walk on the project with the top cover fixed. Do not walk on bare cells as it would break them.
If you have connected everything right ,the multimeter would show some reading like 2V or something like that.
The output voltage and power is directly proportional to the pressure applied or in other words the weight of the person walking on it and the time the person is standing on it.