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 Yes they do, you can actually find those piezo elements in your old/ outdated earphones from the 90's.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

Step 1: This Project Was/ Will Be Featured In

People told me to post a list of pages/ shows where the project was featured/ aired.

_________________________________________

National Television/ TV Shows/ News Channels:

- Jimmy Fallon Tonight Show (Pending)

- ABS-CBN Rated-K Show (June 15)

- GMA News & Unang Hirit

Daily Newspaper (National):

- Manila Bulletin Newpaper (June 18)

Newsletters And Blogs:

- I.F.L. Science Newsletter & FB

- TV5 Interaksyon Newsletter

- Philnews Newsletter

- GMA News Network

- Yahoo Homepage

- Yahoo News PH

- DamnGeeky

- TreeHugger

- GIZMODO

- Yugatech

- etc...

<p>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?<br><br>I certainly like the concept, piezos are definitely difficult to make work.</p>
<p>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. </p><p>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. </p>
<p>feels*</p>
<p>bro i have an fantastic idea pls send me ur no. at rajmotiyani2012@gmail.com</p>
<p>Congrats for your prize in GSF 2014. I am also thinking of a project associated with piezoelectricity. But I don't know which piezoelectric transducers to use. I found the one in the link on internet, is it good?</p><p>http://www.aliexpress.com/item/Free-Shipping-1pcs-diameter-50mm-40K-35W-ultrasonic-transducer-ceramic-chip-piezoelectric-ceramics/32228054695.html</p>
<p>Thank you for sharing, it is inspiring project</p>
<p>i seriosly want to try this but i need a little more informatio on how u have done it sir</p><p>can u please email me about how to make it in ; adityasaba5@gmail.com</p><p>please send it as soon as possible sir...i want it soon sir so please please send it sir</p><p>thnak u sir</p>
I did it
<p>hi! we also have the same concept with this one for our project... would you mind if we ask for your help? this is my email gcamiring@gmail.com and fb gretel camiring ty!!</p>
<p>hi! we also have the same concept with this one for our project... would you mind if we ask for your help? this is my email gcamiring@gmail.com and fb gretel camiring ty!!</p>
Sir can u send me some information and pics about how u did it.Please help me.Thank u<br>My email is <br>Sontnavarrajesh@ gmail.com
Your project is awesome.I need some help.A science fair is going to be held here in our country,Bangladesh.I've got the first prize in the science fair of 2014 and 2015.I want to show your project this year.I have a question,how do you make pizoelectric transducers or find one in an earphone?Can you please show me with pictures? Ive searched the internet a lot but unable to find my answer.Please reply quickly,the science fair will be held in 2nd February.Please.My Email:adilahnaf.1bd@gmail.com<br>
<p>This device was patented in 2005.</p><p>http://www.google.com/patents/US20060021261</p>
<p>hi!</p><p>may i please have a more detailed instruction of how to go about this project.</p><p>can you please send it to my email at anagharamesh02@gmail.com.</p><p>thank u</p>
<p>how to solder the insole generator to the power banks lithium battery?</p>
I want to make the same project hiw can i make it. Pls send me pdf file of this full project and circuit diagram how is it made <br><br><br>Pls send ot to meeeee on email id qwertyvasudeva@gmail.com
an easier way if people don't have access to piezo elements is to have a magnet oscillate freely when walking and you can have a coil around this magnet (probably around a tube) so as the person walks voltage is induced in the coil .... bingo
<p>If I were to add 6 more 20mm piezo plates to the circuit so that I can charge the 2200 mAh power bank more effeciantly, would I need to add 8 more rectifiers (because he used 4 for the original 3) or can I just keep using 4? Or if if I need to do something different? Please help.</p>
<p>I think that someway that would work even better is to plug every piezo in parallel just like you did and then connect it to a 1000mF 50v capacitor then into a voltage regulator and then just add some more capacitors only to regulate the voltage, and i think that if you put a switch you may charge a cell phone directly from the circuit, because the voltage will be already regulated and control, or if you want to avoid to a fail in a circuit plug it into the powerbank</p>
Hey bro this is raj from India bro I am facing the same problem by adding a 5v regulator I am not able to get charge from my 100 nf capacitor so what u suggested. It really works can u talk to me pls as soon as possible
<p>Hi Angelo,</p><p>You mentioned that the project was a little unsafe as there was a 27 volt charge from the piezos and only a 5 volt capacity of the powerbank and you have made a better version without the powerbanks. Is the instructions on how to make version 2 available and if so, how do I acess it. Please Reply</p><p>Thanks</p>
<p>Hey, yes what about that voltage and other charging circuit You made? Could You show any hints?</p>
<p>Hi Angelo,</p><p>You mentioned that the project was a little unsafe as there was a 27 volt charge from the piezos and only a 5 volt capacity of the powerbank and you have made a better version without the powerbanks. Is the instructions on how to make version 2 available and if so, how do I acess it. Please Reply</p><p>Thanks</p>
<p>Hi Angelo,</p><p>You mentioned that the project was a little unsafe as there was a 27 volt charge from the piezos and only a 5 volt capacity of the powerbank and you have made a better version without the powerbanks. Is the instructions on how to make version 2 available and if so, how do I acess it. Please Reply</p><p>Thanks</p>
<p>i made it bro i have an fantastic idea pls mail me at rajmotiyani2012@gmail.com</p>
<p>Even one piezo generates a lot of voltage but the current is not enough</p>
<p>How much current did u generate, I generate like 30-50 volts while walking and up to 75 volts while running but the current is too less, I have used 2 piezos in a parallel circuit and each piezo has a separate bridge rectifier, I tried using a regulator but the current was too less, but it is sufiicient to light up a 12 LED strip brightly, how much current did u generate, how do I increase the amount of current??</p>
Hello..<br>Wat happen if u use 20 piezoelectric transducers<br>Can it make a big change
<p>I have been getting a lot of useful and informative material in your website.<br><a href="http://putlocker0.to" rel="nofollow">putlocker</a></p>
<p>HOW YOU GET TIME TO DO THIS THINGS ????????</p>
Is the circuit properly soldiered
Please tell me is my circuit properly soldiered
Hi!<br>I love this! one problem for me is that I don't walk! Any ideas of adapting this so that a wheelchair could generate power, or a system that charges a powerchair or electric scooter as it is used? It would be great if I could charge my phone from my wheelchair batteries too.<br>Thanks!
<p>Can you explain me how it can charge a powerbank after walking for 5-6 hours where it generates only 0.093 joule per steps while walking?</p><p>The powerbank you mentioned needs 7200 joule to charge fully</p>
You need to run for that! 80000 steps in 6 hours equals 3.7 steps per second. :)
<p>can we use anything else as a substitite for pvc</p>
<p>Hey i am just engaged in creating Electo-Magnetic shoes which will also generates electricity from shoes. <br>So kindly please send me the productivity, fixation and the maintenance cost of your shoes to ovvinn.com@gmail.com or vinayak3k@gmail.com.i will remain greatfull to you.</p><p>Thanking you,</p><p>- Your follower</p>
yahh I made it!!
yahh I made it!!
<p>WILL IT WORK WITH 4 PIEZO DISKS???</p>
<p>Thanks Kuya Angelo now we can work in our investigatory project ..... ( Your older than me ) . Thanks !</p>
Genius!
<p>when we took one step,how many voltage does it charge?</p>
is this really work or not??? please tell friends!!!!!
<p>Can you explain me how it can charge a powerbank after walking for 5-6 hours where it generates only 0.01 joule per steps while walking?</p><p>The powerbank you mentioned needs 7200 joule to charge fully</p>
From where can I get piezo discs and what is the diameter taken...? <br>I need it plzzz...!
<p>Hi, only one question: have you done a brevet?</p>
<p>I am trying to reproduce it using 12 transducers , but i am only generating 100 microA .</p><p>i soldered then in paralell </p>
<p>can you send the parrellel circuit on rajsingh7892@gmail.com plz </p>
<p>mine is not produsing 1v also ipeizo disks are cutting there current can you plz hip me plz </p>

About This Instructable

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Bio: Hi I'm Angelo! I am a 17 y/o Physics Major at the DLSU and I use my course as an inspiration for making ... More »
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