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The intention of this project is to build a straight forward human powered generator from a used bicycle and to use it to power light bulbs, blenders, cell phones, laptops, and other small appliances. This project will help one develop engineering skills while learning about a clean way of generating electricity.

The project was created as part of Infrastructure Academy's environmental technology curriculum for high school students, so it is intended to be both achievable and affordable.

Before continuing with the actual bicycle generator, one should understand how it works, and the components that make it up. View the PowerPoint presentation before moving on to the next step.
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PartsTools

- 2" X 4" Wood
- Wrench
- V-belt
- Saw
- Diode
- Wood screws or nails
- Battery
- Hammer or Screwdriver
- Inverter
- Tape Measure
- Wire
- Screwdriver
- Motor (12-V or higher)
- Perforated plumbers steel
(if motor does not have mounting bracket)

Note: The bicycle generator could be accomplished by skipping steps 5, 6, 7, and 8, to save money, but connecting anything other than a halogen lamp directly to the motor is not recommended due to the varying voltages.

Step 1: PowerPoint Presentation

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<p>Please, before trying to build this, be sure your motor uses permanent magnets; otherwise it will not generate electricity.</p><p><br>Few motors, these days, use magnets. I'm very surprised no one talked about that.</p>
Can I use a stepper motor for this project? <br><br>THANK YOU
<p>Probably not, as a stepper motor has wierd wiring (not -ve and +ve)</p>
<p>How much would the materials cost? Thank You!</p>
<p>Hello</p><p>I have gotten all the parts ready to build this the only problem is that I cant get the motor to spin as the connection is too lose. How did you manage to get it to rotate like that? This is the v belt and motor I used. Many thanks.</p>
<p>I was actually hoping this would have been, or included instructions, on how to make the bike produce power while you're outside doing stuff, not just a stand still bike. I want to be mobile while I power a battery on the bike. My goal was to replace the back tire with a motored tire, and charge the battery that powers this motor while I ride, and turn the motor on when I need to go up a big hill or need a break in peddling for a bit.</p>
<p>https://www.alibaba.com/product-detail/MOTORLIFE-OEM-Electric-Bicycle-Kit-Regenerative_60303390476.html?spm=a2700.7724857.0.0.FK48xl&amp;s=p</p>
<p>What will the Independent, dependent and controlled/fixed variable be for this experiment?</p>
<p>i want to charge a 200amp Battery with 12 volt dc car alternator it gives 30 to 35 amp in normal speed , on extreme speed i think 45 amp? it is possible ? how many minutes required to charge a 200 amp battery?can i charge the Battery with cycle Generator and at the same time can i use the Battery power with an 1000 or 3000 watts inverter/ups </p>
<p>You mean your battery is 200Ah? That's 200 Amp Hour, which means it will supply you with a current of 200 amps for one hour or 1 amp for 200 hours. That's a big battery! It will take the same amount of time to recharge it as to use the power stored in it. So, if you are charging at 30 amps it will take (200 divided by 30) hours or 6 hours 40 minutes. You will probably need to achieve over 800 rpm at the alternator spindle to get 30 amps. Plus, unless you have a PMA [Permanent Magnet Alternator], you will need to energise the alternator's electromagnetic coil by connecting it to the battery too, otherwise there will be no electricity generated.</p><p>An inverter takes power from your battery and makes the voltage higher and makes it into AC [alternating current]. to get 1000 watts at, say, 250 volts requires 4 amps, so, theoretically your battery, when fully charged, would be able to supply that for 50 hours. Whether pedalling would harm the inverter is questionable, but why not buy some stuff and experiment.</p>
I could not find the right motor or generator to use .. Can someone plz attach me a pic of the right one ,,, and what kind of belt I should use <br>Thx
<p>Try a car alternator</p>
am doing on this project...<br>can i know ,how much distance to be kept between the cycle and dynamo in order to get max power? is this distance effect the power generation?<br>can we add any extra equipment ,in order to look project differ from simple
<p>I dont think distance actually matter but you can add a couple of gears in shaft which connects your dynamo with belt or add a shaft, use gear ratio gear 1 teeth/gear 2 teeth make sure first gear has more teeth than second one for more speed and effciency.</p>
<p>What is the point of the car battery? And What are those blue and red wires called?</p>
Can i use fan's motor to generate elcricity???/
<p>Granted, while there are other factors that play into it (such as how MUCH electricity you can generate), yes you should be able to.</p>
<p>So I came up with a way to guesstimate the v-belt length you'll need to order for this project. It's pretty simple and should work with any sized bike. A quick note. You may want a bit more room for your generator, but mine is small enough that it fits nicely at the outer edges of the rim (see pic)</p><p>Step 1: Measure the size of your bike's rear wheel. Mine (from rim to rim - not including the tire was 26&quot; tall, which means I have a radius of 13&quot;. The equation to get the circumference of the rim is 2 x pie x radius = 2 x 3.14 x 13 = 81.64&quot; around. </p><p>Step 2: Subtract 1/4 of the circumference: 81.64 * 75% = 61.23</p><p>Step 3: Add the diameter: 61.23 + 26 = 87.23&quot; Long</p><p>--------</p><p>Optional Step 4: You can add extra length to the v belt in case you don't want the generator sitting just below the rear wheel's exterior. For instance to place the generator 1 foot behind the rear wheel, you add 12&quot; for the extra distance behind the wheel, and then you use the <b>Pythagorean theorem</b> to get the additional v belt required to reach back to the tire: (12 x 12) + (13 x 13) ...then get the square root = 17.7&quot;. So to place the generator 1 ft behind the rear wheel of this bike, we add 29.7 inches to the 87.23&quot; we already had and get 116.93&quot;</p>
am doing on this project...<br>can i know ,how much distance to be kept between the cycle and dynamo in order to get max power? is this distance effect the power generation?<br>can we add any extra equipment ,in order to look project differ from simple
Hello<br> I'm working on A Bicycle Generator project . I need some help with the calculation like the equations for calculating Ratio and speed ,,,, plz if u can help me with the calculation here is my email.<br>Rushoud@gmail.com <br><br>Thanks
<p>If I use a 12 v motor, 24 v battery. Which inverter do I need, and which diode?</p><p>THANK YOU</p>
<p>can any one give synopsis onthis</p>
<p>what is the out put power of this setup ?</p>
<p>Power will be limited by your electrical generator, or your pedaling ability, whichever is smaller. Note, average long-time (e.g. an hour exercise) human pedaling ability is about 100-200W.</p>
<p>Exactly the same Question I also need to know ..... ??</p>
<p>it depends how much current and voltage u are able to draw from motor.</p>
<p>what about the diode, what kind of diode to use? any specific resistance or wattage?</p>
<p>u can use diode acc.to amp. producing. diode having least voltage drop . may be schottky diode</p>
<p>can i use washing machine motor (220v, 50Hz, 1 phase, 4 poles)</p>
Can you just use a altenator instead of a motor? Or are they the same thing... <br>
No they are not the same thing. An alternator is an AC generator which requires electricity to excite the rotors magnetic field (since there are no magnets in an alternator). When the voltage gets to about 12v+ it will disconnect the battery since it would have &quot;self excited&quot; the rotor by the electricity it is generating itself. The problem is, is that the alternator needs to be spinning at an a solute minimum of about 800RPM+ to start self exciting. You need to spin the rotor at about 1000-3000RPM depending on the alternators specifications in order to generate the amount of power its rated at / you want to generate.
<p>Does that mean a sufficient energy is still generated if the dc motor will be run up to 100 RPM? Thanks!</p>
<p>Is this battery rechargeable ? How does it work exactly ?</p>
What size diode do I need?<br>Greg.hoedt@gmail.com
<p>I made this for my middle school science project. I just twisted the diode around the wire from the motor and held it in place with the clamp of the inverter. Why was the live wire from the motor the black wire and not the red wire? The red wire did nothing, but when I connected the black wire, the motor turned (before I added the diode)</p>
<p>if i understood this right , you need both wires connected to complete a circuit, current flows from negative to positive and without the diode the battery will power the motor as it can leak backwards causing the motor to move in the opposite polarity to the direction you are driving it to create power. </p>
Hello i am doing this same project. Did you do a display board for it? If so can you take a pic of it and send it to my email. My email is javanmsterling@outlook.com.
<p>i want to charge a 12 v 200amp battery with this method it is possible ? and i want to charge it in short time 20 to 25 mints ??? please reply some one ....</p>
<p>what if i hook the motor straight up to the chain instead of using a v belt and back rim</p>
Well the ratio would differ that's for sure.
<p>Thats Awesome!</p><p>but why use a motor? mechanical power from the bike is converted into electrical power, not the other way around </p>
Because a DC motor can work as a generator as well as vice versa. At the end if the day, its just a rotating coil inside a magnetic field - which obviously generates an electrical current.
<p>admin where are you?</p>
<p>admin where are you?</p>
<p>will a DC 12V 50mA 5RPM 31Kg.cm High Torque DC Gear Motor work? It would be great to get specific details about the motor, diode, batery and inverter for those of us unskilled in the electronic arts.</p>
<p>I've been thinking of using a solar cell to charge my inverter <br>batteries, while I understand the use of the diode, the only problem I <br>have is how do you stop current being driven into the inverter circuit <br>by the motor/solar cell?</p>
<p>can i use a 12v 7 ampere battery </p>
<p>you should put this in the green design contest</p>
<p>i made it</p>

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