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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 Yes they do, you can actually find those piezo elements in your old/ outdated earphones from the 90's.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>
Hello , <br>ASCAS .. Can I have this shoes , I need to buy this shoe , from where?!<br><br>Ahmed
<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>
You are a genius dude!
<p>hi po! I'm from Philippines! Where can I buy piezo disk? thaanks! God Bless!</p>
<p>i know a place but its in Davao ?</p>
<p>Hey ASCAS, I'm from Philippines too and me and my group decided to make this Project as our S.I.P project, is there any other way to make the Powerbank part safe? And How? Please Help and Thank You in advance. ^.^</p>
ASCAS, couldn't you have where you press facing down?
As the high volt be harmful then how to make it safe?? Please please answer me someone
<p>This is not your original idea. Just saying</p>
<p>did it really charge the power bank's battery? i doubt it...I'm trying to do a similar project</p>
<p>What was the green wire that passed under the hole for?</p>
<p>Is this actually an effective way to generate electricity? I like the idea.</p>
<p>i am confused , how to connect diode bridge for each piezo material..?</p><p>anybody answer me fast..</p>
<p>you have to do it with your hands.(if u have any)</p>
<p>it should be connected in palrell</p>
<p>we made it</p>
<p>we made it</p>
<p>we made it</p>
<p>i made it but it does not work pls point out mistakes and give some tips.</p><p> perhaps a detailed video with steps will help</p>
I did it
Hello , <br>ASCAS .. Can I have this shoes , I need to buy this shoe , from where?!<br><br>Ahmed
<p>very dirty</p>
<p>very dirty</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>
<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
<p>did you connected 28 volts tothe powerbank??</p>
<p>Hey guys! I have one problem. I measured with one piezo max. 30 &micro;A but in the instruction are 2 mA given(pressing by hand, with 3 or 6 piezos?). So the current is too short. The voltage is okay. I gluing only the one piezo on the hole ( height of the plate: ca. 4mm) and test it with the digital multimeter. I guess my piezos and the piezos in the instruction are the same. </p><p> Do you know how can I solve it? </p><p>Thank you guys!</p>
<p>I am also facing the same problem you have. Have you find any solution for this? then please suggest me at surejarishi@gmail.com. I have connected more piezo in parallel but it won't give more current.</p><p>Thank you.</p>
Hello,<br>Unfortunately no.<br>Yesterday, I connected three piezos in parallel but the max. result was about 40-50 &micro;A. So the problem still exist. <br>I would say, if you or I find any solution for this, we will write us.<br><br>Thanks!
<p>ok sure.</p>
<p>Hello</p><p>I am also working on this same project. But I am unable to get the more current. Voltage is sufficient but because of lacking of current, I can't charge my battery faster. This is very big problem and I can't find the proper solution for this.If you have any solution then please suggest me at surejarishi@gmail.com.</p><p>Hoping for the best response.</p><p>Thank you.</p>
<p>HOW MUCH OF WEIGHT IT CAN BEAR??</p><p>WHAT IS CAPACITY IN POUNDS</p>
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!
What Is The Voltage Of The Battery? <br>I Can Help You With This Maybe.!
<p>Where did you get the insole generator?</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>
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>

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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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