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I go very often to cycle in the nature where is no electricity, and during a long bike tour my phone usually discharges. These smartphones have a large capacity but its consumption is big too. I made a few weeks ago another bike turbine for the Bicycle Contest, but I think I can make a better one. So created an all in one wind turbine power bank.

I like to combine cycling with electronics (these are my favorite hobbies) so that's why I create so much bike gadgets now for the Bike Contest.

This project requires basic soldering experience and some patience.

The price of a device like this is very high on the eBay, 112 bucks!!! Click here if you want to see. OK, my one can't light and isn't so smart but this price on the eBay is ultrahigh.



The gadget was made from scrap parts and from very cheap circuit parts. Now go gather materials!

Step 1: Gathering Tools and Materials

Tools
• Soldering Iron
• Glue Gun
• Wire Stripper and Cutter
• Electrical Tape


Materials
• an old CPU fan
• toroidal inductor
• 2N2222 or 2N3904 or BC547 transistor
• 5v step-up module, (boought on eBay)
• germanioum diodes (5 pieces)
• a small perfboard
• an old phone battery or a 18650 cell
• and a small switch
• bike support element


And that's all. The fan generates AC current that we'll convert to dc current to charge up the battery via a Joule Thief circuit.The Joule Thief gives enough voltage boost for the build in Lithium ion battery. I don't use a charger circuit, because this current isn't enough to damage the battery.

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kipkay though..
<p>This was published before Kipkay made his video. </p>
What about motorcycle ? Can we implement same idea on motorcycle
Heyyy we're planning to make this for our scientific investigative project, hmmm can i ask? What's the average speed you must go for it to power up?
If there is wind 10km/h is enough.
<p>lam looking for details about your products place leave a messages .When I post this , I am looking for more Information on this!</p>
Sorry, I hadn't so much free time these days.
<p>How many times do i see this in the newsletter again? I don't like the idea.</p>
Then do not click on it... ;) For me it isn't a ptoblem if is not liked by every single user.
<p>I like the idea, but I may be ending-up in the &quot;Engineer-Naysayers&quot; group.. Most fans like this do not generate AC or DC out when run like this.. they are usually wired as a DC to stepper motor style (the DC voltage is sent through a circuit that turns on one coil, then the next, shuts-off the previous coil, then turns it back on as it goes around, turns off the 2nd again, alternating the two.) The chip (in picture 3 of step 2, with 4-wires) is a combination driver &amp; Hall-Effect sensor. it doesn't generate any voltage.. The sensor is for making sure the impeller/magnet is spinning, and telling how fast it's going (tachometer). The coil &amp; board pack are not easy to remove (I've tried.. they epoxy the daylights out of these, and you either snap the support post, or end-up snapping the wires to the coils. (and they usually solder the pins to the coil down tight to the board.)) Also, on fans with a 3rd of 4th wire (one is the tachometer output, but that is usually a powered signal from the DC voltage, the other is a resistor/temperature output)</p><p>If you can manage to get the board &amp; coil off the frame without doing damage, You have a 3-wire, 2-coil (one common center) |^^|^^| , which you can wire to.. You can actually get the most voltage out of just one coil at a time, because of the magnet arrangement, One will be dropping as the other rises. (so wiring the two outside wires will give only half Maximum, and trying to wire the two outer ends will cause one to short (Collision style) the other as the voltages ride/fall.)</p><p>An AC fan (run by AC voltage, not DC) will not generate any, if VERY little.. the magnet is replaced by a stepped steel armature, and any magnetic field it has would be delegable.</p><p> I still like the idea! There's another plan here in the instructables, of a Quad-Copter made from E-Waste, But I wonder seriously, how they managed to modify the DC fans, to produce enough speed, for the same reason I mentioned about the epoxy holding things together.</p><p>Don't give up though! Note I said not easy.. I didn't say impossible!</p>
<p>I hear all the &quot;professionals&quot; in the comments who are going on about their engineering things and that's fine but dude for a 16 year old this is pretty cool..sounds like a fun project!</p>
To all the people telling this writer who took the time to put this together that the idea is inefficient and all that, if you see a problem come up with a solution. For this devices intended purpose it is everything it was asked to be and more. Honestly when people complain that's when you know your onto something. You think oil companies told tesla they thought his idea was efficient and nice? More power to you. Don't let negativity dissuade your creativity. I'm sure light overcomes dark, unless you'd all disagree saying that lights are actually black hole singularities sucking light back up and anti illuminating the world one head light at a time. This place is supposed to be a network of support.
<p>Try to be serious from time to time. I'm really sorry not being able to support such a project, but it cannot be supported as so many we see flourish these days. Recovering a few milliwatts by spending dozen of watts cannot be considered as efficient, no ?</p>
Rafununu, everyone deserves support. Look to each their own. If you don't like it that's okay we're not here to bother you. Your looking at the numbers and seeing loss, this is understandable. Remember though. As it was, the bike expended energy anyway and in turn only created motion, this invention, while slightly parasitic, turns the motion of the bike through air into enough direct electrical current to charge a battery and store the harvested juice for later. So as a whole, their is a very practical use for this device, remember practicality and efficiency are related but are not the same thing. Personally, and this is just my opinion that you don't have to agree with, I think that I'd be happy to add the extra resistance from the fan if it meant that each time I peddled my bike I could look back and think to myself &quot;finally I'm charging this device by my own raw work, and it is satisfying.&quot; <br><br>Imetomi, your very welcome, this place wouldn't be here without authors like you, I've completed many a project using information sourced from this place, so thank you for helping the cause and spreading your knowledge. If it works it's a success in my book. Id like to start sharing my ideas on here but first I must develop them more
<p>Thank you very much! This is an old and not my best project, but worked, and I knew that there will be a few haters (shouldn't be liked by everyone), that's all right, but not on this site... :) Thanks again. </p>
very well said. be nice people :-)
<p>But using it on a motorbike?</p>
<p>It will work a lot better .</p>
<p>I won't be making this. It is way beyond my skill set. Even reading the comments makes my head reel! But I so admire your ingenuity! What a wonderful problem solving project! </p>
<p>Hi, make it! It isn't so hard, you will learn a lot and it is cheap. :)</p>
<p>Can't never could do anything!!.. Don't be intimidated by this project!.. It is really quite simple.. This is how you learn.. By doing.. You will be able to do this with very little effort!...</p>
Yay +++ people
<p>I see the &quot;know it alls that do nothing's&quot; are out in force on this one. I have actually seen these work. Pretty cool and given enough time and wind they will charge a cell battery. Even though these days there are much better,more efficient, low cost ways to charge things this is still gold if you have access to old muffin fans along with other old computer guts and you are in a pinch....the more you know the better off you will be in any situation, GOOD STUFF!</p>
Charging lithiums over 4.2V will damage them.<br>This really oughta have a voltage limit.<br>Thats why there are many specific lithium charging ICs.
<p>He will not be able to destroy (or charge) any lithium battery with this reverse fan. You might get a certain open-circuit voltage out of a &quot;generator&quot; like this, but there is no way it will deliver any significant amount of power (current times voltage).<br><br>You have just to compare a high quality hub dynamo which delivers 2.4 W with this fan - you cannot turn a wheel attached to such a dynamo by just blowing, yet riding along you don't notice the extra resistance. What happens with the fan if you actually try to extract power is that it will simply not rotate anymore...</p>
<p>Yeah, hub gens are the way to go.<br>I use one, 3W shimano.<br>I barely notice the extra drag.<br>Hey, we re out for exercise any way.</p>
<p>if - only if! - this wind turbine would be anywhere close to producing 2-3 W of electric power (which could charge a smartphone in a mere 3 hours) it would produce at least a comparable drag on the bicycle. Just imagine it dangling on one side of the handle as in the photos ;)</p>
<p>True, very true.</p>
<p>It is 36 bucks on Ebay.</p>
<p>awesome, but isn't a reverse motor a generator?</p>
<p>You should put your generator in front of another fan and measure the time required for charging the battery. Is it 1 hour? 10? week? I'm curious! </p>
<p>or you can attach dynemo to tyres..it can be stable &amp; durable source of energy than this....</p>
<p>Most modern mtb's atb's and roadrace bikes dont have mounts for a dynamo. nor is there a good surface for the dynamo to run against..</p><p>tho i cant imagine this being verry usefull either. i'll stick to my batterypack.</p><p>Unless someone can prove me wrong by actually testing it =)</p>
<p>The alternate geneator has been done, an 'ible of its own . . . stepper motor with a larger diameter plastic wheel than the motor housing , attached to bike with a rigid metal strip to the thru bolt on rear wheel brake. The metal flex strip can also be clamped to rear seat stay , with plastic wheel centered over tread. The plastic wheel is centered on tire tread , unless tread is full knobby . . . and away you go. Definitely want to use regulator , these put out up to 30+ vdc , low amperage . . .</p><p>Bike Generator , Doug Costlow (not sure if the last name is a pun or not . . . )</p>
<p>Have to agree with Nihars2, this is inefficient, but if you're going to make something out of what you have, what are you going to do?. I've never seen a bike with a dynamo mount either, the dynamo usually comes with it's own bracket to mount on the frame so it can be positioned correctly to run against the sidewall of the tyre. That said, who wants to add to the work they do when they're cycling? I'm off to work on some sort of energy recovery system that kicks in when you freewheel. :)</p>
<p>Now the free wheeling idea sounds promising. The dynamo adds work to the rider, the single fan doesn't. Now if there were several fans married to each other, that would work as long as each is producing power independently and all are moving power to the storage battery. This would create a wind tunnel effect with each fan turning easier because the one in front is helping spin the next fan behind it. Just a thought. I'd like to see if that works building off the original INS here.</p>
<p>Just want to point out that anytime you generate electricity from a kinetic system you increase the work that you need to do. The question is: how much electrical power do you want/need and how much are you willing to increase the work that YOU add to the system?</p>
<p>wind resistance on a bicycle is huge lots of watts are needed to overcome it (if you have watched video clips of pro cyclists with power meters showing the difference when drafting) the wind resistance profile of a few fans harnessing some of that energy pales into insignificance</p>
<p>Actually, I think it might increase air resistance on the order of 2 or 3 percent, VERY roughly. An cyclist and his bike might have 5 square feet of frontal area, which of course is a very crude way of estimating air drag, but is probably not horribly far off for lousy shapes like people, wheels, and tubes. If the fan has a frontal area of 20 square inches, that's close to 3 percent. The actual situation is much more complicated, but this gives us an idea of the magnitude. Keep in mind that, at least at slow speeds, there are other significant sources of drag besides the air. </p>
Cool idea but can you make it work as a brake as I imagine many modern cars use or just hybrids.
<p>Actually you could use a dynamo, (hub or conv.), as a brake. You just shorten them outputs when you wanna brake. But the efficience would be as much as the power the dynamo could produce e.g. dynamo 6V 1Amp= 6W. Thats what the brake effect would be. The advantage with the use of microcontrolled charge from the hub dynamo is that it charges Ni-Mh battey whenewer needed, thus having fully charged battery, (depends how much you cyckle, of course). Having a conv. dynamo &quot;latched&quot; to &quot;ON&quot; position, it will have it's friction ON all the time, regardless of needeng charge or not.</p>
<p>Hi. The 'ible here above itself fullfills the criteria to be creative.. even not tested in &quot;laboratory&quot; inviorements :) To all of you &quot;bike-nut's&quot; go and check www.teksel.net There's about this using a &quot;hub&quot; dynamo = built in in the center of the wheel. Comparison with a traditional dynamo/hub-dynamo is tremendious. Traditional dynamo, (rolling against the tire), lose a LOT of effience to the friction only. Try to roll a hub-dynamo without a load... no friction at all, only when you load it.</p>
Sorry but that was a tough read. Just tell me, how does this compare to efficiency of a hub dynamo and is spending a a couple hundred on one still the best most efficient option.
<p>Step 1: Glue tiny rare earth magnets around rim with epoxy.<br>Step 2: Glue tiny coil to brake caliper. Run wires up the brake cable to handle-bar mounted charge controller.<br>Step 3: Profit.</p>
<p>Magnets on the rim will attract ferrous materials from the dirt and would soon be thick enough to rub against the coil. Unless you ride through clean pavements.</p><p>Comment on this Instructable:<br>What would happen if you installed more than one fan? I've never seen wind energy harnessing facilities with only one turbine.</p>
<p>Better inform every automotive engineer who has ever designed a reluctor for anti-lock braking systems... after 22 years of using this design, we're all going to be in deep stuff...</p>
I don't think magnets for bike speedometers are strong enough (like rare earth magnets) as they only need to have enough magnetic force to close a reed switch. So I think they are not really that comparable.<br><br>We better try our ideas and share with everyone whether they work or not.<br><br>For all I know, most of the suggestions and ideas here aren't subjected to trial to see their validity.
<p>If you move it a bit closer to the hub it might be ok. The magnets for bike speedometers don't seem to attract much dirt. Won't the magnets on the rim ruin braking performance? Or are you putting the magnets on the the surface that faces the hub? I've often thought of putting a disk of magnets on the spokes and using a coil or a few coils, but maybe that would be fiddly. I wonder if manufacturers put disk brake mounts on both sides of the hub? In that case, one of them would be a natural place to mount a disk with the magnets.</p><p>BTW, for a prototype, you might try mounting the magnets with 3M VHB tape. If you do really good surface prep and wait a warm day or two before using, my guess is that they'd hold pretty well, but you could still get them off. Getting the last of the adhesive off might be a bit tougher.</p>
Why don't you actually test it?

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Bio: Hi, I'm Tamás (Thomas), a 17 years old Hungarian guy. My hobby started more than 10 years ago. I learn electronics, physics, programming, IoT ... More »
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