WALK- CHARGER Presented by: Subhransu B. Std -IX WALK-CHARGER by SUBHRANSU B., SAI International School

TOPICS TO BE COVERED 1.Problem definition 2.Introduction to walk-charger 3.What is Walk-charger 4.Components of Walk-Charger 5.Snapshot of Walk-Charger 6.Piezo cell 7.Operations of Walk Charger 8.Why is the Device put in the Heel 9.Various Concepts used to Produce Electricity Gear Box Solenoid 10.Usage of Walk Charger 11.Improvements 12.Conclusion 13.Reference WALK-CHARGER by SUBHRANSU B., SAI International School

The Inspiration In 2013 the media was flooded with pictures of a natural catastrophe in north India. Destruction of bridges and roads left about 100,000 pilgrims and tourists trapped in the valleys leading to three of the four HinduChota Char Dham pilgrimage sites. The Indian Airforce, the Indian Army, and paramilitary troops evacuated more than 110,000 people from the flood ravaged area. While watching the media the idea of the development of Walk-charger came to mind, as an alternate form of energy to help people in need.

1.Problem Definition Generating Electricity and to meet its demand is a big challenge in today’s world. Generating energy from motion called kinetic energy which can be converted into electricity can be said as green energy. Green energy can be very useful to charge various devices like mobile, torch lamp, mini fan, navigation tools, etc Hence the proposed work in the form of walk- charger is a sincere effort to solve the above mentioned energy issues. WALK-CHARGER by SUBHRANSU B., SAI International School

2.Introduction to Walk-charger Walk-charger generates green energy by converting energy in motion to electrical energy. Scope of walk-charger: It can be scaled from mini charging like mobile upto medium devices charging like laptops and tablet. In walk-charger the three various concepts that can be used to produce electricity are 1.Gear box 2.Solonoid 3.Piezo cell WALK-CHARGER by SUBHRANSU B., SAI International School

3.WHAT IS WALK- CHARGER ? WALK-CHARGER by SUBHRANSU B., SAI International School

4.COMPONENTS OF WALK-CHARGER The model of the WALK CHARGER is a shoe with: a thick heel to insert a device into it & simultaneously maintain the height of the shoe. The main circuit consists of: a miniature gearbox spring a 3000 to 4000 rolled copper wire magnets wires and mobile battery & piezocell WALK-CHARGER by SUBHRANSU B., SAI International School

5.SNAPSHOT of WALK-CHAGER HAMMER LED STORAGE CELL In the finished product the hammer wont be there, it just to show the pressure being applied to Piezo cell below it Piezo cell

6. PIEZO ELECTRICITY Piezoelectricity is the electric charge that accumulates in certain solid materials (such as crystals, certain ceramics, and biological matter such as bone, DNA and various proteins) in response to applied mechanical stress. When the whole sole will be covered with Piezo cells the production will increase. WALK-CHARGER by SUBHRANSU B., SAI International School

PRESSURE IS BEING EXERTED GALVANOMETER Figure of Piezocell 6. PIEZO ELECTRICITY contd.. WALK-CHARGER by SUBHRANSU B., SAI International School

7. OPERATIONS OF WALK-CHARGER First the hammer will hit the ground, under it the Piezocell is present. Due to the pressure on the cell electricity is produced & stored in the storage cell. The cell is charged now to power different devices. WALK-CHARGER by SUBHRANSU B., SAI International School

8.WHY IS THE DEVICE PUT IN THE HEEL ? While walking the maximum pressure is felt at the heel of the shoe. The more the weight of the person the more pressure is felt. Unless we are sprinting, we are letting the gravity do the work so, the perfect place for the device is the heel. WALK-CHARGER by SUBHRANSU B., SAI International School

9.VARIOUS CONCEPTS USED TO PRODUCE ELECTRICITY In our project the two different methods earlier used to produce electricity are: 1.GEAR BOX 2.SOLENOID WALK-CHARGER by SUBHRANSU B., SAI International School

WALK-CHARGER by SUBHRANSU B., SAI International School

9.1GEAR BOX The hammer has been made in such a way that it hits the ground first as you walk or jog and levers up as the foot comes down. The arm is clutched with a gearbox so that with every step, the gears turn slightly to drive a dynamo fitted on the side of the shoe. WALK-CHARGER by SUBHRANSU B., SAI International School

9.1 GEAR BOX Contd.. WALK-CHARGER by SUBHRANSU B., SAI International School This generates electricity, which gets stored in any storage cell. The electricity generated finds its path through wires via a voltage regulator.

9.2 SOLENOID Electromagnetic induction is the production of a potential difference (voltage) across a conductor when it is exposed to a varying magnetic fieldpotential differenceconductormagnetic field WALK-CHARGER by SUBHRANSU B., SAI International School

9.2 SOLENOID Contd.. Faraday's law of induction is a basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF).electromagnetismmagnetic fieldelectric circuitelectromotive force (EMF) It is the fundamental operating principle of transformers, inductors, and many types of electrical motors, generators.transformersinductorselectricalmotorsgenerators WALK-CHARGER by SUBHRANSU B., SAI International School

With bench-top experiments, we have found that the PROTOTYPE of the shoe can produce upto 3.7 volts and we can charge 5 to 6 mobile batteries in a day. WALK-CHARGER by SUBHRANSU B., SAI International School 10.USAGE OF WALK-CHARGER

10.USAGE OF WALK-CHARGER contd.. The other applications that we have made are: table lamp table fan. Even these charged cells can be used by defense personnel and also during natural disaster as source of electric energy. WALK-CHARGER by SUBHRANSU B., SAI International School

Name of the similar approach Description of similar approachAdvantagesDisadvantages 1.PEDI POWER SHOES [1] The Pedi Power hits the ground before any other part of the prototype shoe. A lever arm strikes first. It is attached to a gearbox that replaces much of the shoe’s sole and turns the gears a little with each step. The gears drive a motor mounted on the outside of the shoe that generates electricity to send up to the battery. It provides enough energy to charge a mobile. It is not compact. Heavy weight. Makes the person uncomfortable while walking. 2.SOLE POWER [2] The mechanism is actuated by every heel strike. During every step, a small generator spins to create electricity. table1:-comparison of related works Can be fitted in any size of sole. Not safe, may cause short circuit. Very expensive Doesn't supports all types of appliances RELATED WORK COMPARISIONS: WALK-CHARGER by SUBHRANSU B., SAI International School

11.Advantages of Walk-Charger It is compact. Made up of light weight materials. comfortable while walking. safe, all the electrical devices are inserted within the sole made up of insulating material. Affordable Produces enough energy to charge a mobile phone in general. WALK-CHARGER by SUBHRANSU B., SAI International School

12.IMPROVEMENTS The main concern that has been improved is the weight of the shoe. Firstly it was very heavy but now due to the use of light materials, the weight of the shoe exactly the same as that of a normal shoe. We have made our device a bit more compact. This approach likely to provide enough dependable power for phone and other portable electronics. WALK-CHARGER by SUBHRANSU B., SAI International School

CONCLUSION This project was a great learning to produce electricity in non-conventional ways like from walking. Many smaller utility devices can be used through the charged batteries of walk-charger. The project gave a scope to improve upon areas like the weight of the shoes, compatibility of the device, & its efficiency. Future scopes are there to improve upon to run larger devices. WALK-CHARGER by SUBHRANSU B., SAI International School

REFERENCES 1. provides-pedestrian-power-2/ [1] provides-pedestrian-power-2/ 2. [2] WALK-CHARGER by SUBHRANSU B., SAI International School

Press Coverage WALK-CHARGER by SUBHRANSU B., SAI International School

THANK YOU WALK-CHARGER by SUBHRANSU B., SAI International School