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 Yes they do, you can actually find those piezo elements in your old/ outdated earphones from the 90's.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.

GMA News Network/ Channel Coverage:

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efahrenholz8 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)  efahrenholz8 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)  ASCAS8 months ago


well played dude, keep going ;)

Mr AbAk21 days 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.mai1 month ago

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

wildan.mai1 month ago

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

wildan.mai1 month ago

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

wildan.mai1 month ago

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

wildan.mai1 month ago

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

HillaryF made it!5 months ago

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

gopus HillaryF1 month 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 HillaryF4 months ago

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

EE3 HillaryF4 months ago

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

gopus1 month ago

is piezoelectric transducers and piezoceramic disc the same

debrom251 month ago

Where can I buy the discs?

ikr8 months ago

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

ASCAS (author)  ikr8 months ago

Thank you very much! :D

ikr ASCAS1 month 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 :(

LeoW21 month ago

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MeghaS11 month ago


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MeghaS12 months ago


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10000mAh (2).jpg

Thanks Bro!

davidbarcomb2 months ago

This is very useful and eco friendly. Great work!

iMazzter2 months ago

Hi ASCAS. Where did you buy the Piezoelectric Transducers? I also live here in the Philippines.

yhdesai2 months ago

made it many times but silver plate on piezo breaks everytime

Amir IzzatA2 months ago


how can i contact u?i have a few qn to ask or sumthg?

atljedi12 months ago

I am very confused about the bridge diode. am I supposed to glue the diodes to the pad or will the sodder stick it there for me. should I cut the metal on the diodes or just leave them how they are. I am so confused!

DangerousTim3 months ago

i've done a lot of research on piezoelectric energy harvesting, and from what I've learnt I can say (like many othera) that your idea is very impractical, and also the way you have executed the project is quite wrong. For example, you've directly connected the link poly battery to the piezos, which doesn't do anything much except probably damage your battery.

I don't no know how you won 3 projects, as well as the gsf price with this...

But you use this idea to make a pedometer, or maybe footstep activated LEDs and so much more...

litchex3 months ago

where can i buy piezotransducer ????

Which diodes are used??

i have made the shoe but its not charging my power bank or my phone
i live in india and here we have DC piezo electric discs and i am getting 17 volts from 4 piezos i followed your steps but i am not able to charge my phone or power bank
i would be glad if u help me! :D

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