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Electricity Generating Footwear - Generate Electricity By Walking (Concept)

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Did you know that you can produce electricity by just walking? Here's a little science experiment that will show you a little secret on making insoles that can charge USB devices! The challenge is to make a slip-on insole that can produce enough electricity to charge batteries/ USB devices.

Google Fair 2014:
This is my entry for Google's 2014 science fair. Please support us by hitting the like and share button on our YouTube video. The contest is YouTube based so getting a fair amount of likes and viewers would help a lot in getting us through the competition.

Thank you guys for the support! The project has qualified for the regional finalist and won a local award in GSF 2014! :D


Development of The Project:
The power generating soles are one of my first concept projects. I started my first prototype last five years ago although it was a very primitive, compared to my current design. My old prototype had two TO-3 plastic spacer sandwiched between two piezo discs. It produces a fair amount of current, enough to charge a Nokia 3310.


5 years later, I came back with the idea of using the sandwiched piezo setup, this time integrated to a charge collector and powerbank. So I thought, why not add 2 more pairs? After all, more is better.

Concept Behind The Project:
Piezoelectricity was present ever since mid-18th century. Piezoelectricity is the electric charge that accumulates in certain solid materials (such as crystals, certain ceramics in response to applied mechanical stress. This sounds familiar! Yes they do, you can actually find those piezo elements in your old/ outdated earphones from the 90's.

Why Not Use Dynamos?
As much as possible, I tried to avoid using dynamos. Yes dynamos produce more electricity but it will feel like you've stuffed a rock in your shoe. Don't forget dynamos will create a lot of noise.

Any Practical Uses?
As funny as it sounds, charging a phone with your shoe isn't really joke. Who knows maybe someday shoe companies like Nike could use these insole generators to power fitness chips (inside shoes) that would sync to your phone wirelessly. This way, you don't have to charge your smart-shoes just to sync them with your phone.

Disclaimer: This is just a little science experiment. It will show you the concept of producing electricity using piezoelectric elements. Don't assume that is close in becoming a product.

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efahrenholz10 months ago

I'm curious, since one side is somewhat elevated, how did you feel after the two hours? Any back pain or stress in the ball of the foot? Does it feel more spring like?

I certainly like the concept, piezos are definitely difficult to make work.

ASCAS (author)  efahrenholz10 months ago

Surprisingly, it feel comfortable. The foams are squishy enough to make the insole feel like a gel slip-on. When jogging a 10-20% energy loss is expected due to the gaps of energy production. Jogging for at least for 3-4 hours should charge the battery full. A walk should take 5-6 hours to charge a 400mAh full, due to the 40% energy loss.

Don't forget that these peizo elements produce more energy when jumping. The weight of the user/ subject also affects the amount of energy produced. The heavier the subject, the higher the current.

ASCAS (author)  ASCAS9 months ago

feels*

Carlos321fm made it!10 days ago
I create it and not work
image.jpg

Maybe take away some of the piezo disks, see if that works!

Carlos321fm10 days ago
Angelo, i need contact you, my email is carlos321fm@gmail.com
Carlos321fm10 days ago
Angelo, i need help, i create one of it and not work
AniketD10 days ago

Wow! I'm going to do this for a science fair coming up, is that ok?

Amazing idea, hope it becomes reality and people do buy it!

IshanP19 days ago
I am connected to various foundation to help new ideas become reality email me carlostobillo@gmail.com
pots112622 days ago

i'm curious that a piezoelectric disc could only produce a micro current.. can this factors can charge a power bank or any rechargeable battery efficiently?

awesome device, can't wait to wear it :D

hi. i'm a student. I just want to ask how many bridge diodes are needed, is it two or only one for both side of the insole?

ASCAS (author)  cluadinedeniegadoma1 month ago

As stated on the guide, the piezo discs are connected in parallel. You only need one bridge diode (total of 4 rectifier diodes).

are you the one who made the charge collector circuit or is it installed in the powerbank?

hi. im a student. I just want to ask how many bridge diodes are needed, is it two or only one for both side of the insole?

well played dude, keep going ;)

Mr AbAk1 month ago
Nice Ible ...

Yes, I made it successfully. But still I can't get the voltage from three piezo which is measured by you. I made it by similar way like your.

There are Six piezos
Three on each side...

wildan.mai2 months ago

is it okay to use 4400 mAH mobile power bank? and i used 11 piezoelectric disc how many1N4007 should i use?

wildan.mai2 months ago

is it okay to use 4400 mAH mobile power bank? and i used 11 piezoelectric disc

wildan.mai2 months ago

is it okay to use 4400 mAH mobile power bank? and i used 11 piezoelectric disc

wildan.mai2 months ago

is it okay to use 4400 mAH mobile power bank? and i used 11 piezoelectric disc

wildan.mai2 months ago

is it okay to use 4400 mAH mobile power bank? and i used 11 piezoelectric disc

HillaryF made it!6 months ago

This was pretty easy to make, even with my limited experience with soldering.

photo.JPG
gopus HillaryF2 months ago

where did u get those discs

Hi Hillary, I am curious to where that yellow wire is connected to. Could u pls help.

i think the other wire is connected to the other 3 piezos on the other side of the sole

This is correct. There are 3 more piezos on the other side and the yellow wire connects them. They do all need to route through the diode bridge eventually, after all.

Iam having the same doubt . Did you get any idea sir

Escuse me sir , would you tell what the yellow wire in your circuit is , if u dont mind .

EE3 HillaryF5 months ago

A picture of the underside would be extremely helpful :):)

EE3 HillaryF5 months ago

Hi Hillary, can you tell me what the yellow cable is for and also where it goes to?

gopus2 months ago

is piezoelectric transducers and piezoceramic disc the same

debrom252 months ago

Where can I buy the discs?

ikr9 months ago

Voted on all fronts!! Fabulous Idea!! (Thumbs up!) B)

ASCAS (author)  ikr9 months ago

Thank you very much! :D

ikr ASCAS2 months ago

you know, four medals is quite something :)

(loud clapping)

hey guys. i kindly need help to find a reliable and easy study for my research this semester, i dont know what to do. huhuhuhu, if i gonna do the the sole power ( an electricity-generating shoe) which is i think costly. and problem is where can i get the pzio?huhuhu :'( . anybody help?suggestion? i kindly need your help guys please :(

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