This document describes a device called "Walk N Charge" that allows users to charge low-power devices like phones and MP3 players through the energy generated from walking. It works by converting the biomechanical energy from walking into electrical energy using either piezoelectric materials or a small dynamo. As the user walks, their strides pull a string attached to the dynamo, spinning it to generate 3.5 watts of power - enough to slowly charge a phone battery over time. The device is portable, renewable, economical, and can help charge devices for those in rural areas or military personnel on the move without other power sources.

1. REPRESENTED BY:-
VISHAL KR. SINGH
E.EDEPT.
“WALK N CHARGE”
(BY USING DYNAMO)

2. ABSTRACT:
This project is designed to ensure that our cell phones never run out of juice by letting us charge it
while we are on our daily walk and getting some exercise and thereby getting two jobs done at the
same time . The basic idea is about converting a part of the bio-mechanical energy spent in our day-
to-day lives(while walking) into a usable form and storing it to charge low-power battery operated
device.

3. CONTENTS
 INTRODUCTION
 FLOW OF OPERATION
 WORKING
 ARRANGEMENT
 PROS& CONS
 ADVANTAGE
 FUTURE PROSPRCTIVE
 CLOSING STATEMENT
 CONCLUSION

4. INTRODUCTION
Walk n Charge is one of the latest technologies used to charge the low power device
like Mobile batteries, MP3 player Batteries, Power Bank etc.
Two technologies are used to convert energy used in Walking into Electrical Power
i.
ii.
By Using Piezoelectric material.
By Using small Electro Mechanical Devices (Dynamo).

5. • This gets compressed while you walk and generates a substantial voltage, which
when combined with appropriate electronics, can be used to charge a mobile
phone battery.
• The piezoelectric device generates about 150 mill watts of power as of now, which is
not sufficient to run a cell phone, but would be enough to charge the battery slowly.
• It involves placing small electro-mechanical devices, such as a dynamo, in the heel
of the shoe. The dynamo spins every time your heel strikes the ground, thereby
generating a small amount of current.
• The dynamo technology has the potential of generating much more power than
piezoelectric material.

6. FLOW OF OPERATION
While walking rack
rotates the pinion (Rack
and Pinion mechanism)
Pinion rotates the
Dynamo (ME to EE)
Electrical
energy is
obtained from
dynamo
The electrical energy is
stored in Rechargeable
Battery
Can be consumed
at any time
of the day

7. WORKING:-
Work n Charge is worn below the knee cap on one leg and a light string is attached to the
other leg. The strides taken help in pulling and retracting the string, which is further
attached to a dynamo that generates about 3.5 Watts; enough to charge low-powered
devices like mobiles, MP3 players, GPS devices, etc
Walk-N-Charge is about converting a part of the bio-mechanical energy spent in our day-to-
day lives
(while walking) into a usable form and storing it to charge low-power battery-operated
devices.
Walking involves a change in relative displacement of around 35 cm between legs. This
repeated linear motion could be converted to rotary motion with the help of a pulley and
string. Thus, the bio-mechanical work is converted into mechanical form and eventually
stored as chemical energy in batteries to store electric energy.

8. ARRANGEMENT:-
• The device is clamped on one leg using a Velcro
strap and a hole lets out a Nylon string that is
attached to the other leg that helps in the
conversion of the displacement into rotary motion.

9. Each Walk-n-charge Is Capable Of Generating Minimum 3.5 Watts Of
Power At Normal Walking Speed (4 Km/H).
An Intermittent Walk Of 20 Minutes Is Sufficient To Charge A Mobile With Around 1
Hour Talk Time, Which Can Be Considered As An Average Person’s Phone Usage
For A Day.
For A Person With An Average Walking Of Half An Hour Per Day, This Device Can
Generate 2 W/H Of Energy.

10. PROSAND CONS:
PROS:-
• Eco-friendly
• Portable
• Can be charged at any time without any power source
• Compact
• Renewable
• Economical
CONS:-
• Wear of gear teeth will affect voltage production
• No water-proof

11. APPLICATIONS:-
 Increasing the effectiveness of mobiles in rural India by providing a
portable means of charging of mobiles, torches, radios, etc.
 Helping military personnel charge their GPS devices and other low-power
electronic gadgets while on the move.
 Providing an alternate means to wall-based charging for MP3 players,
mobiles, etc. in cities, thereby, helping
 today’s fast generation to move faster without mobile battery problems.
 Charging your cell phone might soon be as simple as taking a walk around
the block.

12. FUTURE PROSPECTIVES:-
• India has signed the Kyoto Protocol - an acknowledgement that we share the
concern of global warming, which also expresses our commitment to slow
down climate change. Walk-N-Charge would just add to the efforts put in by
India in various innovative ways.
• This technique of charging helps us to use the renewable energy from
human movement.
• We can consume electricity without worrying about power shutdown.

13. CONCLUSION:-
Hence, walk-n-charge is the best idea for battery charging. Even if 0.1% of the
Indian population uses this device, it can generate 1500 kW/h of energy and
can help reduce carbon emission by 2.25 tonnes per day. Thus, Walk-N-Charge
promises you a source of energy that is not only clean, portable and
inexpensive, but also charges your mobile while you get charged up!