Abstract-- The paper aims to design a cost effective system for charging a mobile by utilizing the property of piezoelectric substances, which produces electric potential difference on application of mechanical strain. The project further cares about the proper utilization of non-conventional means such as sound energy to generate the required electrical energy for mobile charging. In this piezoelectric material is connected to generator shaft which is used to drive the generator thus producing electrical energy. Intensive care has also been taken to store the generated energy by means of a battery. The stored energy in a battery will be delivered when the charging of mobile is required.

Keywords—Mobile charger, Battery, piezoelectric substance, capacitor .

A. Introduction

In the present time the world has witness a surge in the demand of energy saving devices. Attempts are made to save energy and fuel because of very dependence of humans on them. The fuel conservation calls up for tapping the non -conventional sources of energy. Several major attempts have been undertaken in the past but only some system has turned instrumental in utilizing the optimum available sources of energy. The devices are normally inefficient requiring larger space and huge installation cost. The creation of a low design effective systems which can save fuel, store energy and solves a purpose seems to be the acceptable solution to any challenging task in this energy crisis scenario.

B. Present Day Problems

Nowadays, with increasing evidence suggesting our use of

fossil fuels is contributing towards climate change, now is

the time to switch to an alternative means of generating

energy where possible. In the

A. Syed Zeeshan Ahmad, B-Tech., Department of Electrical Engineering, National Institute of Technology, Raipur-492010, India (e-mail: shannn123@rediff.com).

B. Rishabh Sharma, B-Tech, Department of Electrical Engineering, National Institute of Technology, Raipur-492010, India (rs55192@gmail.com).

C. Akshay Kumar Sharma,B-Tech, Department of Electrical Engineering National

Institute of technology, Raipur-492010,India(akshay.sharma1825@gmail.com)

Search for alternative energy sources there's one form of

energy you don't hear much about, which is ironic because

we are referring to sound energy. Sound energy is the energy

produced by sound vibrations as they travel through a

specific medium. We hope ultimately the technology could

be used to convert ambient noise to power a mobile phone or

generate energy for the national grid from rush hour traffic.

C. Solution Approach

The above problem is tackled by utilizing the piezoelectric substances in such a way that it produces electrical energy on application of mechanical strain produced by sound waves.

D. Principles involved Piezoelectric substances are the one which generate electric charge on application of mechanical stress or pressure .They can convert mechanical energy produced by sound waves into electrical energy.So, piezoelectric substances are transducers which will convert mechanical stress produced by sound waves such as our voice into electric potential difference, which will charge the mobile battery.

II. CONSTRUCTION

A. Related Terminologies- Piezoelectric sensor-A sensor which converts

mechanical strain into electric charge. Voice amplifier-an amplifier which amplifies sound

waves to higher amplitude Cell phone-common mobile phone Capacitor-a device that stores charge

B. Block diagram-

III. Working

MOBILE CHARGING USING SOUND ENERGY

Sound waves are fed to voice amplifier which increases the intensity of sound waves and thus to higher amplitude, amplified sound waves are then applied to piezoelectric sensor which converts it into electric potential or more specifically electric charge, which is then stored in capacitor.Capacitor is connected to terminals of battery which charges the battery if battery voltage is less than the voltage across capacitor

IV. Applications-

a) This system can be used in places where high intensity sound is produced to convert sound energy into electrical energy

b) This system can be implemented in common mobiles where user’s speech will be used as a source of energy.

V. Conclusion- In this paper, an optimization methodology is presented to solve the problem of mobile charger. The non-conventional sources of energy have been potentially tapped and consumption of fuel is restricted as much as possible. This low cost effective system will ensure high proficiency and will turn out to be a successful project in this energy crisis scenario.

VI. References-

Dekker, ”Electrical engineering materials”