ELECTRICITY FROM WALKING

BySanthosh. R

TABLE OF CONTENTS

PAGE

INTRODUCTION....................................................................1

PRINCIPLE..............................................................................1

MATERIALS REQUIRED....................................................2

PROCEDURE..........................................................................2

CIRCUIT....................................................................................5

PHOTOS OF THE PROJECT.............................................5

RESULTS..................................................................................8

APPLICATIONS......................................................................8

REFERENCE............................................................................9

INTRODUCTIONWhenever we walk we waste our energy.

There are many ways to recover some of this energy in the form of electricity. The easiest and the space saving way is to produce electricity from piezoelectric property of certain crystals.

PRINCIPLE Piezoelectricity is the ability of some materials to generate an electrical potential response to applied mechanical stress. This may take the form of a separation of electrical charge across the crystal lattice. If the material is not short circuited ,the charge induces a voltage across the material. The word is derived from the Greek piezo or piezein, which means to squeeze or press.

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MATERIALS REQUIRED

Piezoelectric transducers-as required for the area1N4148 diodes-equal to the no. Of transducersCardboard-required sizewires-requiredMultimeter-1Crocodile or alligator clips with wires-2Soldering iron-1soldering wirewire strippersInsulated copper wire-a reel

PROCEDUREThe picture to the right is the first prototype before building my projectIt contains two sheets of cardboard with a piezotransducer wired between the two. The readings as I stamped on it are pictured below,

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The pictures of the soldering on the piezoelectric transducers are,

For the project first we have to arrange the piezoelectric transducers on the cardboard and mark their places for sticking on later.

Cut pieces of cardboard to a size larger than the transducers.PAGE 3

Take a reel of insulated copper wire and mark the places and strip off the enamel on the copper wire. Cover the stripped piece of wire with solder. Solder a end of diode with one of the electrodes of the transducers. Join other electrodes of the transducers commonly.

Connect the cathodes of all the diodes together.

The connection of the diodes will act as a positive source and the other wire connected commonly acts as a ground.

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CIRCUITTo the circuit for

smoothing

PHOTOS OF THE PROJECT

Finished pictures

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From piezoelectric transducer

AC to DCVoltage stabilization

and regulation

Battery chargingStep up to AC to run appliances

The cardboard with transducers covered with a layer of sponge.The pictures of my project displayed in an SCIENCE FAIR are below,

Me with my project,(the project is not displayed as it was put on the floor)

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My project covered with a designed sheet .

The readings showing 13.93 Volt

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RESULTS➔ The output power is directly proportional

to the pressure applied.➔ No constant output is seen unless a high

frequency of stepping on it and off it is present.➔ It has certain dis-advantages of heavy

weights or loads.➔ When the area of the cells are increased

the power output is also increased.

APPLICATIONS✔ Can be implemented in heavy crowded areas as

a type of floor.✔ Can be implemented in the boots of the soldiers

and the power generated can be used for their equipments and thus it reduces the load of battery backups carried by the soldiers.

✔ Research has been going on by scientists for the above mentioned item.

✔ It has been implemented in a disco in Netherlands and in sub-ways in Japan.

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REFERENCE• http://en.wikipedia.org/wiki/Piezoelectricity

If you have any doubts regarding this project please feel free to contact me atsanthoshramaraj@gmail.com

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