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    GROUP 31POWERED BY PEOPLE

    Supervisor: Dr. Azmi Abdul Wahab

    Team Leader :Nur Haedzerlin Bt Md Noor

    14883

    Team Members:

    Fernando Juma Muzonde14617

    Muhammad Adham Bin Adnan 14900

    Tan Chee Huat 16072

    Raymond Joseferd

    14962

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    INTRODUCTION

    PROBLEM STATEMENT

    OBJECTIVES

    LITERATURE REVIEW

    METHODOLOGY

    RESULTS ANDDISCUSSION

    CONCLUSION AND

    RECOMMENDATION

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    Most electronic devices run on battery andsometimes one can barely find the time to

    recharge them.

    The device created can remedy the situationwhereby no one will have to wait around to

    recharge their iPods and smart phones.4

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    For people who enjoy an active lifestyle, they will

    find it difficult to keep their entertainment device

    charged while they are On- The-Go.

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    To produce a working prototype that convertshuman body motion into electrical energy.

    To create a working prototype to charge an

    entertainment device such as MP3 player.

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    Harvesting human kinetic energy by

    Longhan Xie and Ruxu Du, 2012.

    Mechanical energy of human body.

    Method proposed.

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    Number of turns of coils required:

    =

    Where:

    N = Number of turns of wire = Magnetic Flux = B x A

    As stipulated in the design requirements,

    = 5

    5 + =

    Faraday's law of induction.

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    Human Passive Motion Harvesting System(Abdi. H and Mohajer. N, 2010).

    The proposed system.

    Piezoelectric transducer.

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    Biomechanical EnergyHarvesting by J.A. Hoffer et

    al., 2008.

    Regenerative braking. Mechanical, control and

    power generation systems.

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    CITATION METHOD CONCLUSION

    Longhan Xie and

    Ruxu Du (2012)

    Electromagnetic

    induction initiated by

    eccentric rotor, which

    absorbs human

    motion.

    Simulation shows that the harvester with

    40mm diameter and 50g weight, worn on

    the wrist, can produce dozens of mW of

    electricity during normal walking.

    Abdi. H andMohajer. N (2010)

    Integration of apiezoelectric harvester

    into belt to generate

    electricity from

    breathing.

    Results showed that it can provide up to1.2mW in rest time and 2.3mW after mild

    exercise time. This amount of energy is

    sufficient to power an mp3 player.

    Q. Li, V. Naing,

    J.A. Hoffer, D.J.

    Weber, A.D. Kuo

    and J. M. Donelan

    (2008)

    Converting knee

    motion into electricity

    with an aid of

    regenerative braking.

    Experimental results show that generative

    braking generated

    4.80.8 W of electrical power with a

    minimal increase in metabolic cost.14

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    ProblemDefinition

    ConceptualDesign

    Proof ofConcept

    DesignFinalization

    PrototypeFabrication

    Testing

    Finalization

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    PROBLEM DEFINITION

    As mentioned earlier in Problem Statement,

    people who enjoy an active lifestyle will find itdifficult to keep their entertainment device

    charged while they are On- The-Go.

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    The minimum voltage required for a

    charging application is 5V.

    Power generation

    Using Faradays Law of Induction, ourconceptual design was to incorporate the

    magnet which is moved inside thecylinder wound by copper coils by

    human body motion.

    CONCEPTU L DESIGN

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    WIRECOIL

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    ChargingCircuit

    Electromagneticinduction

    AlternatingCurrent (AC)

    Input

    Bridge RectifierDiode

    To change from

    AC to DC

    Rectifier Capacitor

    Smoothing thewaveform

    Filter

    LM 317

    To increase thelow voltage to a

    higher voltage

    VoltageRegulator Provide a USB

    port forcharging thedevice.

    Batterycharger

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    Main ComponentsOf The Circuit

    CIRCUIT PART COMPONENTS VALUE QUANTITY

    Rectifier Zener Diode (BZX55C10) - 4

    Filter Capacitor 1

    Voltage Regulator

    LM 317 - 1

    Capacitors

    .

    2

    Resistor

    .

    1

    Variable Resistor

    1

    Battery Charger

    Resistor

    1

    Capacitor

    1

    NPN Transistor

    -

    1

    Zener Diode (BZX55C10)

    -

    1

    Diode (1N4002) - 1

    Female USB Cable

    -

    1

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    (a) Humanbody

    motion

    (b)Engineerin

    gCalculatio

    n andAnalysis

    (c)ComputerSimulation

    forCharging

    Circuit

    Proof ofConcept

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    (A) Human body motion

    PROOF OF CONCEPT

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    (B) ENGINEERING CALCULATION ANDANALYSIS

    Neodymium Iron Boron Magnet

    Specifications:

    i. Magnetic Flux Density: 1.32 Tesla

    ii. Dimension: 1.3 cm diameter x 4cm lengthiii. Area: DL = 1.634 x10^-3 m^2

    Copper coil selection:

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    Assuming the average time for the magnet to passthrough the coil is 0.5 seconds,

    =5 +

    =

    5 + 0.5

    1.32 0.0016340.5 = 1275

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    (C) COMPUTER SIMULATION FOR

    CHARGING CIRCUIT

    Input

    Bridge

    Rectifier

    Filter

    Voltage

    Regulator

    Charging

    Circuit

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    Our finalized design consist of the 3 main components

    - Armband

    - Power generator: Magnet and 1500 turns copper

    coils.

    - Charging circuit

    DESIGN FIN LIZ TION

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    PROTOTYPE F BRIC TION

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    Before everything is assembled together, we

    had to make sure each component isserving its purpose well.

    TESTING

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    Testing Of Magnet And Coils Assembly

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    Testing Of Charging Circuit With LED

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    Breadboard circuit design which is then solderedinto veroboard.

    FIN LIZ TION

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    Material

    Price (RM)

    Magnets

    90

    Copper Coil 8

    Spring 5

    Casing 4

    Armband 8

    Miscellaneous 15

    Total 130

    COST N LYSIS

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    Our consideration

    The magnet is attached to the forearm for

    comfort.

    Our assumption

    People will jogging and sometimes sprinting.

    The speed of jogging and sprinting is sameas amateur people.

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    NO OF TURNS (2 MAGNETS) VOLTAGE

    50 0.16 V

    300 1.3V

    1550 3.37 V

    Multimeter cannot detect small changes,

    therefore the reading is not accurate.

    Therefore, we used a computer software from

    the lab to plot the induction graph.

    Multimeter Readings

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    Forearm (spr int witho ut spr in g)

    Maximum amplitude is 5.551V.

    The oscillation of the cycle is not

    even.

    The magnet cannot travel through

    Forearm (spr int w ith spr in g)

    Maximum amplitude is 9.529V.

    The magnetic field cut trough

    coil more often.

    The magnet travel through thecoil easil .

    ME SUREMENT USING

    DESIGN STUDIO SOFTW RE

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    Forearm (jogging with spring)

    Maximum amplitude is 5.551V.

    The magnetic field cut trough

    coil more often.

    Forearm( jogging without spring)

    Maximum amplitude is 4.507V.

    The distribution of peak also little

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    4.507

    6.936 5.551

    9.5298.2479.995 8.558

    9.995

    0

    2

    4

    6

    8

    10

    12

    Jogging With noSpring

    Jogging WithSpring

    Sprint With NoSpring

    Sprint With Spring

    Forearm

    Palm

    Voltage VS ConfigurationVolts

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