Cell Phone Charger

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About: Former recon marine, did time in the Navy as well. build robots for a living, engineer as a trade. Inventor, Black belt TKD. battle bots. robot wars etc. Medal of valor recipient.

Charge your phone while walking with this pendulum powered charger. Your walking motion charges your phone. I will add the power control circuit later if i have time. It is a simple LM chip and cap layout to condition the power. more on that later.

Step 1: Loppy

Here is the rear case of the charger all from abs plastic 3d printed the belt loop to strap it to your hip or to your arm or leg.

Step 2: Power Band

Here you wind the coils around the cutouts. When the magnets on the pendulum pass over the coils they produce a voltage. Once we collect and condition the power we send it back to the phone. This part is also going to be printed. I may have to build from steal though will see I maybe able to incorporate the steel core if needed into the printed part. 

Step 3: Pendulum Swings

This is the pendulum it holds the neodymium magnets that will pass over the coil to produce the power. Notice the holes cut at the outer diameter of the weight. this part will be made of steel. or copper. have not decided yet. but needs to be heavy to keep the momentum going when the magnetic drag tries to slow it down.

below are the magnets.

Step 4: Round and Round She Goes.

the layout is simple the penutulum rotates and passes over the coils and produce power, the pentulum has a bearing in the center to help with a smooth ride. 

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    11 Discussions

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    vickypeng94

    1 year ago

    I am an undergrad Student at Berea College and I am currently working on building an electric toothbrush. I would really like to learn more about this model and potentially draw it for 3D- Printing, I was wondering if you could help?

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    vickypeng94

    1 year ago

    I am an undergrad Student at Berea College and I am currently working on building an electric toothbrush. I would really like to learn more about this model and potentially draw it for 3D- Printing, I was wondering if you could help?

    0
    None
    vickypeng94

    1 year ago

    I am an undergrad Student at Berea College and I am currently working on building an electric toothbrush. I would really like to learn more about this model and potentially draw it for 3D- Printing, I was wondering if you could help?

    0
    None
    vickypeng94

    1 year ago

    I am a College Student at Berea and I am currently working on building an electric toothbrush. I would really like to learn more about this model and potentially draw it for 3D- Printing, I was wondering if you could help?

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    alcurb

    4 years ago on Introduction

    Has your project ever got built? Seems like a good idea, but in practicality, I'm not so sure how it would work. The hub and torus are one solid iron or steel, correct? Would that design increase or reduce efficiency of the generator coils? Maybe a schematic would help immensely to understand the design and reproduce it.

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    kelseymh

    6 years ago on Introduction

    This is all renderings. Do you have a working version? If so, it would be awesome if you including actual photographs of the components, and a demonstration of its successful functioning.

    3 replies
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    kelseymhsparten11

    Reply 6 years ago on Introduction

    Ah! Thank you for that explanation. Now I understand why it's purely rendered. It looks like a reasonably simple design, which ought to function.

    What I don't quite see is how you get the current out of the system. You've got the stators all wound around a monolithic piece of metal. How do you separate the current source/voltage from ground in order to supply power to the device you want to charge?

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    sparten11kelseymh

    Reply 6 years ago on Introduction

    Well the iron will be incased inside the plastic the control circuit i will post once i get it done.