DIY - Check out our great range of DIY products at Wigley DIY!
DIY Bike Generator
17
http://www.instructables.com/id/DIY-Bike-Generator/ technology workshop living food play outside DIY Bike Generator by SKSW47 on May 9, 2014 Table of Contents DIY Bike Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Intro: DIY Bike Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Step 1: Assembling the Bike . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Step 2: Adding the Fan Belt to the Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Step 3: About the Fan Belt Choice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Step 4: Step 4: Motor to Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Step 5: Step 5: Charger to Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Step 6: Step 6: Battery to Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Step 7: Making the Bike User Friendly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Step 8: Hacking the Charge Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Step 9: Battery Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Step 10: Preserving the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Step 11: Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 File Downloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Step 12: Current Progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Step 13: Future Ideas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Related Instructables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Advertisements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
-
Upload
marius-danila -
Category
Documents
-
view
23 -
download
0
description
DIY Bike Generator
Transcript of DIY Bike Generator
-
http://www.instructables.com/id/DIY-Bike-Generator/
technology workshop living food play outside
DIY Bike Generatorby SKSW47 on May 9, 2014
Table of Contents
DIY Bike Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Intro: DIY Bike Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 1: Assembling the Bike . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 2: Adding the Fan Belt to the Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 3: About the Fan Belt Choice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Step 4: Step 4: Motor to Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 5: Step 5: Charger to Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 6: Step 6: Battery to Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 7: Making the Bike User Friendly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 8: Hacking the Charge Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step 9: Battery Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Step 10: Preserving the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 11: Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
File Downloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Step 12: Current Progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Step 13: Future Ideas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Related Instructables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Advertisements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
http://www.instructables.com/tag/type-id/category-technology/http://www.instructables.com/tag/type-id/category-workshop/http://www.instructables.com/tag/type-id/category-living/http://www.instructables.com/tag/type-id/category-food/http://www.instructables.com/tag/type-id/category-play/http://www.instructables.com/tag/type-id/category-outside/http://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=title
-
http://www.instructables.com/id/DIY-Bike-Generator/
Intro: DIY Bike GeneratorUsing easily accessible parts, it is possible to build your own bicycle generator that will charge your cell phone! This instructable is an extension of this instructable madeby our friends. Eventually, this bike will stand on its own in our student union, so our classmates can sustainably charge their phones off the grid!
The basic setup of the bike is as follows: the back wheel of the bike spins a DC motor via fan belt, the motor is connected to a charge controller, the charge controllercharges a lead-acid battery, and the battery is then connected to an inverter. You can then plug your phone into the outlets of the inverter!
Basic Materials needed:
Bicycle Stand
Bicycle Frame with Back Wheel
12V Lead Acid Battery
DC-AC Inverter
DC-DC Battery Charger
24V DC Scooter Motor
Fan Belt
Fan Belt Pulley
Wires, Screws, Wood, and a Metal Rod
NOTE: We added more to our bike to make it run better, but these are the bare minimum materials to get it up and running.
Step 1: Assembling the BikeWe attached our bike system to a 2' by 6' piece of plywood. We used a bike stand to suspend and stabilize the back wheel. You can bolt the back wheel stand to theboard, but we thought it was unnecessary since other portions of the bike were attached to the board. Our bike was donated with the front wheel off, so we built a frontwheel stand. Make sure you have enough room on the board to attach the motor behind the back wheel!
Building the front wheel stand: The forks had a 1 cm diameter hole, so we found a one inch dowel for it to rest on. In addition, we took a 1.5" x 3" wooden beam andcut it into two 9.5" and two 4.5" blocks. We drilled a 1cm hole 1/2" down from the top of each of the 9" blocks. We then put the metal rod through the blocks andassembled the stand (see photo above). We added some washers and nuts to make the connections more secure. The two 4.5" blocks should be cut to fit tightlybetween the 9" blocks, as shown above. After building the bike stand, the front wheel should sit snugly on the blocks. Next, we screwed the lower 4.5" block down to theplywood. Finally, we attached the upper 4.5" block for stability. Now the bike stand for the front wheel is complete and should sit snugly on the rod between the blocks.
http://www.instructables.com/id/How-to-Build-a-Bicycle-Generator-1/?ALLSTEPShttp://www.mcmaster.com/#large-cell-batteries/=rw4943http://www.mcmaster.com/#dc-inverters/=rw49enhttp://www.hobbypartz.com/75p-0620-charger.html?gclid=CMDXkuXS17YCFUeCQgodiWQAQghttp://www.monsterscooterparts.com/24v30mowisp.htmlhttp://www.amazon.com/Browning-Super-Gripbelt-Section-Length/dp/B003U1W6P8/ref=sr_1_11?s=industrial&ie=UTF8&qid=1397512047&sr=1-11&keywords=1%2F2+in+vbelt+96http://www.amazon.com/CHICAGO-CASTING-Diameter-V-Groove-Die/dp/B00004RAO8
-
http://www.instructables.com/id/DIY-Bike-Generator/
-
http://www.instructables.com/id/DIY-Bike-Generator/
Step 2: Adding the Fan Belt to the MotorWe removed the tire from the back wheel using this video (make sure all the air is out of your tire). Next, we attached the pulley to our motor by adding a collar to thepulley and making it D-shaped. The pin running out side of the motor is in a D-shape so this allows the pulley to fixate to the motor and rotate the internal portion of motorsmoothly. The screw holding it on is a left handed screw that goes on in the opposite direction of a normal screw allowing the motor to turn without having the screw comeout. We then attached the belt to the wheel and to the pulley. Make sure that the motor is directly aligned with the back wheel. We screwed down the motor to theplywood base by having one person hold the motor unit as far back as possible while the other screwed it down, this insured maximum tension in the fan belt. The moretension we can get on the belt, the better it will work.
Note: Be aware of the direction that your motor is spinning in order to a positive and not negative voltage output. If it's negative, just switch the leads at your chargecontroller.
https://www.youtube.com/watch?v=1zxHYJ0AtAo
-
http://www.instructables.com/id/DIY-Bike-Generator/
Step 3: About the Fan Belt ChoiceThe motor is rated at 2800 rpm, but riding at 20 mph is only 250 rpm at the back wheel. Thus, we chose a pulley with diameter about ten times smaller than the wheel, soriding leisurely could give us higher rpm (about 10x increase). For practicality purposes we chose the thickest belt that could fit in the rim of our wheel. Our belt was ratherlong because it needed to be able to fit around the entire wheel and still have extra length to attach the pulley at the motor. Depending on what belt you are using, themotor could be mounted at various distances from the back wheel.
Function of Motor: This component is what is converting the movement of your legs on the bike into a DC voltage.
-
http://www.instructables.com/id/DIY-Bike-Generator/
Step 4: Step 4: Motor to ChargerPurpose of Charger
The charge controller regulates the rate at which current travels into the battery. Ultimately, the charge controller prevents overcharging and draining of the battery, whichwill ruin the health of the battery. If the battery is overcharged then water electrolysis will occur, converting the water molecules into hydrogen and oxygen gas inside thebattery. This will increase the sulfuric acid concentration in the battery and expose the internal plates to oxygen, quickly degrading the internal materials. Draining thebattery will lead to sulfation, the crystallization of sulfur on the plates inside the battery. This will diminish the concentration of sulfuric acid in the battery and it will nolonger be able to charge to its original potential.
Charger Properties
This charger can regulate the amount of current going to the battery, read the voltage that you are producing when biking, and the total amount of energy you havegenerated in one bike session. It will not give you the percentage of the battery charged, therefore (this is in the additional section) we have required that the user ride onthe bike a set amount of time before the inverter will allow them to charge their device and that the user cannot charge the device if they are not biking.
The battery that we are using is a 12 V battery therefore the charge controller we chose can take us from 12V to 24V. The battery has a maximum charging current of 5.4A, therefore the charge controller should be put on a current output setting less than the max. Increasing the current that the charge controller is requiring will makepedaling harder. Thats a good reason why its good to keep the gear system on your bike, and not make it a one-speed!
Adding a Capacitor or Zener Diode
Also, it is important to not overcharge the power controller by biking over its limit of 24V. You can add a zener diode with a breakdown voltage of 24V, so that if voltage isabove 24V the zener diode will allow excess voltage to flow away from the charger.
In this setup we added a capacitor in parallel with the charge controller to assist in regulating the voltage generated by the motor. If we were to suddenly have LanceArmstrong hop on the bike and generate a voltage more than 24V temporarily, we can avoid a sudden overload to the charge controller by forcing a regular dischargefrom the capacitor.
-
http://www.instructables.com/id/DIY-Bike-Generator/
Step 5: Step 5: Charger to BatteryChoosing your Battery
As we said before, you want to make sure that your battery is being charged at an appropriate current and voltage, well within the limits listed on your battery. Be sure tofind a battery that your charge controller can charge or vice versa. The reason that you want to have a battery is so that you can store the energy that you are creatingsothat you dont have to bike constantly to charge your device and that you can bike without charging a device and store your energy for later.
Taking Care of your Battery
Make sure your battery is not moving when you are bikingsloshing around the liquids in the battery will add a kinetic energy variable into storage of your energy. Its nota good variable. Your battery will output different voltages at different levels of charge. The voltage across your battery will be different when it is charging, sitting, anddischarging; they will be about 14V, 12.5V, and 11 V respectively. Remember that these values will change over time (most likely decrease) as your battery ages and isbeing used. Degradation will occur. Be sure that if the output of the battery is 14V then you drain the battery so that it doesnt overcharge.
http://www.power-sonic.com/images/powersonic/sla_batteries/ps_psg_series/12volt/PS-12180_12_Sept_10.pdf
-
http://www.instructables.com/id/DIY-Bike-Generator/
Step 6: Step 6: Battery to InverterPurpose of AC Inverter
The current that comes out of your wall socket is alternating current (AC) rather than direct current (DC). The inverter converts the DC output of the batter to AC so thatyou can appropriately charge your devices. Also it provides the infrastructure to charge your devices, as in a plug and USB ports.
Choosing the Right Inverter
When choosing your inverter you want to be sure to make sure it give an output current and voltage similar to that of your typical wall socket, accepts a range of voltagessimilar to your battery, and the wattage that it can output.
Depending on the devices that you decide to charge (here we were interested in charging laptops, cell phones, and other small student devices) you need to make sureyour inverter can output the right amount of watts. As a reminder, watts are a measure of energy required over a unit of time, joules per second. Appliances typically listthe wattage that they require but to give you an idea a cell typically requires 5 watts and a laptop computer requires about 45-60 watts. The inverter featured in thisinstructable has a capacity of 400 watts.
Step 7: Making the Bike User FriendlyOur aim is to put this bike in our student union. Therefore we wanted to make this bike as user friendly as possible. A big obstacle we found was that the charge controllerrequired you to press a button for 3 seconds in order for it to start charging. Although this is relatively simple for us to do, we felt like other users might not read thedirections and think that they were charging even though they hadn't pressed start. The screen lights up which is misleading because it is technically "on", but is notcharging. Therefore, we hacked our charger and will control it with an arduino instead to make the energy generation process user-friendly.
Step 8: Hacking the Charge ControllerHacking the Charger: We took apart the charger by unscrewing the sides and popping off the top lid. We found that there was a ribbon wire connecting the 4 buttons tothe circuit board. There were 5 wires on the ribbon wire, thus we thought that there might be one "reference" wire and the other four wires went to the buttons. Connectingthe "reference" wire to any of the other four button wires was equivalent to pushing a button. We took a multimeter and tested our theory, and it was valid. To press abutton, we should connect one of the wires with the "reference" wire. Next, we added wires to each of the five terminals where the ribbon wire used to connect to. Thewires were led outside of the charge controller by drilling a hole through the side panel and pulling them through. These wires lead to our arduino shield, which will allowus to press the buttons and control the start button autonomously using a relay.
External Buttons: We used 4 buttons on our shield to recreate the buttons on the controller for testing purposes and in case we wanted to change settings on the chargecontroller.
Use of a Relay: We used a OMROM G5V-1 Relay to "press" the start button using our arduino. The image above shows how we connected each of the relay pins. Thedigital output pin from the arduino that is wired to the relay will signal the pressing of the button when it is set to HIGH. Two other pins on the relay connect to the startbutton wire and the "reference" wire, completing the connection. We had to connect one other relay pin to ground. For precaution, we put a diode across signal andground of our relay because we don't want current flowing into our arduino when the digital output pin is switched to LOW (start button is off) . Now the arduino has thecapability of pressing the start button autonomously.
Programming the Start: Although we know how to get the arduino to press start, we don't know when to tell it to do so yet. We would like it to press start for a fewseconds after the user has been pedaling for about 10 seconds. How will we know a user is pedaling? We would like our arduino to read the DC voltage of our motorwhich will be present when a person is biking. However, our voltage is more than 5V, so our arduino cannot read it directly as it has a limit of 5V. We used this article tocreate an appropriate voltage divider to have the arduino read motor voltage.
A simple sketch of this voltage divider is in the picture above. I will include all the arduino code in another step. We used a 3.9K and 1K resister to scale down the voltagegoing into the arduino by a factor of 5. We've yet to pedal hard enough to get the motor to go above 17V, so we should be safe. Usually, we are outputting less than 15Vfrom our motor. The voltage divider will go into an analog input in the arduino which will let the arduino calculate the motor voltage.
Psudo Code:
void loop(){while(!started){
startCharger();
}
void startCharger(){
http://www.omron.com/ecb/products/pdf/en-g5v_1.pdfhttps://www.inkling.com/read/arduino-cookbook-michael-margolis-2nd/chapter-5/recipe-5-11
-
http://www.instructables.com/id/DIY-Bike-Generator/
if (motorVoltage>12 && hasBeenOnForLong){
digitalWrite(relayOut, HIGH); //which really is equivalent to pressing Startstarted=true;
}
else if (motorVoltage>12){
//say it has been on for longer
}
else{
//reset hasBeenOnForLong to the beginning
}
}
-
http://www.instructables.com/id/DIY-Bike-Generator/
Step 9: Battery VoltageWe soldered an additional voltage divider to the shield in order to measure the voltage of our battery. We found that this was the best way to calculate how much ourbattery was actually charged. The output voltage of the battery is between 14-11V; decreasing as it becomes discharged. We found these tables which relate the outputvoltage of the battery to the battery state of charge in percent values for a 12V Lead Acid battery. We can make estimates from this graph, but we will further calibrate itlater. Eventually we could add an LCD screen to readout the percent battery charge on our arduino. This readout can be coded by a lot of "if" statements simplystructured as follows:
if(batteryVoltage
-
http://www.instructables.com/id/DIY-Bike-Generator/
Step 10: Preserving the BatteryLead Acid Batteries last a lot longer if they are not completely drained. Furthermore, we want to make sure users are generating electricity and not just charging devicesfrom the battery without pedaling. We decided that we wanted users to bike for at least 2 minutes continuously before they were allowed to charge their phone. This ideaturned out to be a little difficult, because we need something that can control a lot of current. We ended up employing a HUF7345 MOSFET, which we be between ourinverter and battery. When we signal the MOSFET with our digital output pin on the arduino, it will allow current to flow from the inverter to the negative terminal of thebattery, thus completing the inverter/battery portion of the circuit. When it is signaled on, the MOSFET will act as though it is not there at all and the cell phones cancharge normally. This is possible because the MOSFET we used allows a high current. However, we decided not to allow computer charging on our bike because thatwould draw more current than the MOSFET could handle. Furthermore, we were afraid the computer would deplete our battery. We are relying on some users biking justfor fun without charging.
We will keep track of time since the charger pressed start and once two minutes have elapsed, we turn the MOSFET "on" by setting the digital out to HIGH. Here is partof the code:
String allowBatteryAccess(){if(currentMillis-startMillis>(1000*120)){ //if 2 minutes of time has elapsed
digitalWrite(allowBattery, HIGH);
return "Your device has started to charge. Keep Peddling";
}
return " "
}
https://www.fairchildsemi.com/ds/HU/HUF75345P3.pdf
-
http://www.instructables.com/id/DIY-Bike-Generator/
Step 11: Board LayoutWe soldered all our components to a small board. Here is a color coded layout of how we attached everything. A lot of what we were attaching was to components off theboard, so the names of these components are written instead. Attached is the untested Arduino Code for our board.
File Downloads
Sasha_and_Sallie.ino (3 KB)[NOTE: When saving, if you see .tmp as the file ext, rename it to 'Sasha_and_Sallie.ino']
Step 12: Current ProgressOur board currently has the same functions as the charge controller before it was hacked with the arduino. We have the board wired up for the most part, but we need stillneed to attach a couple more components:
attach the battery and motor positive leads to the voltage dividerground the other end of the voltage dividerattach the inverter negative lead to the drain of the MOSFETattach the ground lead of the battery to the source of the MOSFETattach battery ground to the arduino groundground the relay
These connections may be more difficult to create because the wires on the external components of the mortor and charge controller are much larger than the wires onour arduino shield. Once we get everything added we can test our code. We may need to fiddle with the timing of the start button and how long we it will be "on". Thecharger performs battery checks when it turns on so we might need to hold it down for as many as 8 seconds. We will check this once we get our board finished.
Step 13: Future IdeasThough our system works, there is a lot more to be done with user interfacing before it can be introduced unsupervised in the student union. We definitely should encaseour electronics so that no one can touch them. We also would like to have a LCD display the can interact with the user showing how much they have charged the batteryand their real time motor output voltage. We already have a clear plexiglass stand where people can put their homework reading. We plan to have instructions pasted tothe back of this stand and mount the charge controller and arduino to the bottom of the stand.
http://www.instructables.com/files/orig/F58/FEBY/HUZKEH19/F58FEBYHUZKEH19.ino?utm_source=pdf&utm_campaign=fileshttp://www.instructables.com/files/orig/F58/FEBY/HUZKEH19/F58FEBYHUZKEH19.ino?utm_source=pdf&utm_campaign=fileshttp://www.instructables.com/files/orig/F58/FEBY/HUZKEH19/F58FEBYHUZKEH19.ino?utm_source=pdf&utm_campaign=fileshttp://www.instructables.com/files/orig/F58/FEBY/HUZKEH19/F58FEBYHUZKEH19.ino?utm_source=pdf&utm_campaign=files
-
http://www.instructables.com/id/DIY-Bike-Generator/
Related Instructables
How To Build ABicycleGenerator bysaullopez52
DIY BIKE HACKDC BIKEGENERATORLED LightsLight EmittingDiode (video) byGREENPOWERSCIENCE
Paper cuphydro electricgenerator byn1cod3mus
Cycle PhoneCharger by RajatCool
Mini EcologicGenerator(MEG) by Ger dela Mora
Bike Light 2011by hydronics
Advertisements
Comments
50 comments Add Comment view all 69 comments
Fission Chips says: Feb 13, 2015. 8:08 AM REPLYHey, nice job. But just a question - did you copy this from Chris Hackett's and Popular Science's book Big Book of Maker Skills? They seem pretty similar.
McgyverD says: Feb 10, 2015. 1:08 AM REPLYI built one out of a exercise bike and used a chain and a treadmill motor that is giving me 12 volts at 50amps, I'm able to charge the battery and watch tv atthe same time. And just going at the rate of 2 miles per hour riding it. I invented it my self the design.
SKSW47 says: Feb 10, 2015. 12:33 PM REPLYThats awesome!
http://www.instructables.com/id/How-To-Build-A-Bicycle-Generator/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/How-To-Build-A-Bicycle-Generator/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/How-To-Build-A-Bicycle-Generator/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/How-To-Build-A-Bicycle-Generator/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/saullopez52/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/DIY-BIKE-HACK-DC-BIKE-GENERATOR-LED-Lights-Light-E/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/DIY-BIKE-HACK-DC-BIKE-GENERATOR-LED-Lights-Light-E/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/DIY-BIKE-HACK-DC-BIKE-GENERATOR-LED-Lights-Light-E/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/DIY-BIKE-HACK-DC-BIKE-GENERATOR-LED-Lights-Light-E/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/DIY-BIKE-HACK-DC-BIKE-GENERATOR-LED-Lights-Light-E/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/DIY-BIKE-HACK-DC-BIKE-GENERATOR-LED-Lights-Light-E/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/DIY-BIKE-HACK-DC-BIKE-GENERATOR-LED-Lights-Light-E/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/DIY-BIKE-HACK-DC-BIKE-GENERATOR-LED-Lights-Light-E/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/GREENPOWERSCIENCE/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Paper-cup-hydro-electric-generator/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Paper-cup-hydro-electric-generator/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Paper-cup-hydro-electric-generator/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Paper-cup-hydro-electric-generator/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/n1cod3mus/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Cycle-Phone-Charger/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Cycle-Phone-Charger/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Cycle-Phone-Charger/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/Rajat Cool/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/Rajat Cool/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Mini-Ecologic-Generator-MEG/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Mini-Ecologic-Generator-MEG/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Mini-Ecologic-Generator-MEG/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Mini-Ecologic-Generator-MEG/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/Ger de la Mora/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/Ger de la Mora/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Bike-Light-2011/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/Bike-Light-2011/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/member/hydronics/?utm_source=pdf&utm_campaign=relatedhttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#commentshttp://www.instructables.com/id/DIY-Bike-Generator/http://www.instructables.com/id/DIY-Bike-Generator/http://www.instructables.com/id/DIY-Bike-Generator/http://www.instructables.com/member/Fission+Chips/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Fission+Chips/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/McgyverD/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/McgyverD/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSS
-
http://www.instructables.com/id/DIY-Bike-Generator/
Kressle says: May 14, 2014. 6:53 PM REPLYDon't know if anyone else has suggested this, but what about running neodymium magnets along the rim of the wheel and spinning those through a coil ofwire like a wind turbine? More expensive, but you may get more efficiency with a better design. Thoughts?
dratman says: Jul 28, 2014. 9:32 AM REPLYMagnets-on-bike-wheel would be great as an engineering exercise, but in this project, it is another kind of exercise that counts.
Billster36 says: Jun 16, 2014. 7:22 AM REPLYI don't get the need for the inverter. Why not just hook up a standard cigarette lighter type outlet to the battery and charge the cell phone with the same sortof plug you would use in the car?
arizzotti says: May 19, 2014. 2:08 PM REPLYYou can vote for this Bike Generator to win a Nest here: http://homeplanet.maker.good.is/projects/bikegenerator?position=0&sort=972
Bill WW says: May 19, 2014. 12:37 PM REPLYVery nice, love the way you link the material list to the actual suppliers.
I always thought it would be great to connect a bike generator such as yours to a TV (as the ONLY power source). You would have to work out if you wanted towatch.
300w = 0.4hp, about the max a human can sustain.
Computothought says: May 17, 2014. 4:30 PM REPLYNice.
fazlehaq says: May 16, 2014. 8:45 PM REPLYexactly how long it took to charge that battery completely ?
loachridge says: May 15, 2014. 10:57 AM REPLYOr maybe even make some refinements to the K-TOR to fit it into a bike frame.
loachridge says: May 15, 2014. 10:56 AM REPLYLook up "12 volt dc hand generator".This is essentially what was mounted to bikes I mentioned earlier.Can you make this work dual purpose?Put an LED in for lower consumption. Add a small Li battery for charge storage if your device isnt plugged in.
omikeo says: May 13, 2014. 8:48 PM REPLYcan you give us an indication of efficiency
like how long and fast one may have to pedal to make toast?
Squidyman says: May 14, 2014. 12:52 PM REPLYGiving an guesstimate, a toaster draws about 700 watts. You could probably create about 200-300 watts peddling pretty hard. It takes approximately 100watts to toast a piece of bread so it would take at least 30 minutes to be able to toast your bread. You would need a shower after all that peddling, so anyenergy you saved by peddling is lost to the water and heat bill XD
omikeo says: May 14, 2014. 8:05 PM REPLYYeah fig' it'd be a lot of work, I don't think people realize how much work would have to be done to create the energy they use. If they had tocontribute in this form of muscle power to electric, conservation, I suspect would be the norm.
Squidyman says: May 14, 2014. 12:56 PM REPLYminus my spelling errors! :P
NovaKnightZer0 says: May 14, 2014. 6:09 PM REPLYI think i might attempt this.
But im going to try and not take apart my bike and just make it so that i can just easily place my bike into the contraption pedal make electricity and when imneed to go somewhere just take my bike off and go.
http://www.instructables.com/member/Kressle/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Kressle/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/dratman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/dratman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Billster36/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Billster36/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/arizzotti/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/arizzotti/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Bill+WW/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Bill+WW/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Computothought/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Computothought/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/fazlehaq/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/fazlehaq/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/loachridge/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/loachridge/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/loachridge/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/loachridge/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/omikeo/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/omikeo/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/omikeo/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/omikeo/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/NovaKnightZer0/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/NovaKnightZer0/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSS
-
http://www.instructables.com/id/DIY-Bike-Generator/
Althenuker says: May 14, 2014. 6:47 PM REPLYYou don't need to take apart your ebike. After you place the rear axle on the trainer, just disconnect the power line that goes to the motor and hook it upto the 12 V battery. Mount a voltmeter on the handle bars and monitor the output voltage from the motor while cycling on the trainer. Just pedal hardenough to keep the charging voltage below about 14.5 V to prevent overcharging the battery. I think this is the maximum charging voltage for caralternators. At this charging voltage, my output was about 60 W.
Althenuker says: May 14, 2014. 5:32 PM REPLYIt's great to see projects like this in support of bike generators. Well done! However, you really need to look closely at your project from the energyproduction and consumption standpoint. I built a bike generator using a 350 W BIONX motor from my electric assist bike last Dec during an 8 day ice stormpower outage. The best I could do was to generator 60 W for about 10 minutes before I was whipped. I'm sure you younger fellas could do better than me. Iused it to charge my 12 V deep cycle battery, charge my cell phone from a USB port connected to a standard 12 V cigarette charger and run my 12 Vinternet satellite modem. After a couple of days, I was really beat and my 12 V battery was depleted. I reluctantly had to give it up and charge my batteryusing my truck while driving to the grocery store. Nevertheless, it was an interesting project and actually kept me warm during the frigid weather. Good luckwith your project, but to get increased power you need several cyclists pedaling while hooked up to the same generator.
xarlock667 says: May 14, 2014. 1:05 PM REPLYI'm going to be a bit rude, so I apologize in advance: But WHY would you go to so much trouble to charge a cell phone? You have almost 200 worrth ofequipment there that you could have put to MUCH better use. It is not an entirely worthless concept, but make it a LOT more useful by using a rectifier andmaking it put out 120v AC. That way you can charge several phones at once, perhaps a laptop or run a TV, etc... Good try.
SKSW47 says: May 14, 2014. 4:13 PM REPLYThe inverter has a standard plug for it as well. You could technically charge a laptop with the basic set up, but we are planning on putting it in our studentunion and figured people would mostly like to charge cell phones. Thus, we only used a MOSFET rated for lower current because that is what we hadlying around. If you omitted Arduino part of the bike, you can charge many other things as well.
Squidyman says: May 14, 2014. 1:08 PM REPLYBecause you can XD
xarlock667 says: May 14, 2014. 2:09 PM REPLYIn all fairness, "Because you can" is the best reason to do ANYTHING. Therefore, you win.
loachridge says: May 13, 2014. 8:07 PM REPLYWhen I was younger; dont go to far into that; I remember bike head lights being run from a generator attached to the bike.
A simple lever would lower the pulley side down onto the tire. That would generate enough to power a pretty good head light. Or is it headlight?
You could use the same principle here. Put another wheel, or something round rubber, on the generator. And work the mounts to take any bike. That wayyou can actually ride your bike. Or just like the old ones, mount the generator to the frame.
Squidyman says: May 14, 2014. 12:55 PM REPLYThere is a lot of efficiency lost by relying on the tire to turn a small motor mounted to your bike. It would work, but it would take a long time.
loachridge says: May 14, 2014. 1:46 PM REPLYI will disagree with you for now. I like to be "proven" wrong. ;-)You have the materials all right there.Why not give it a shot. It worked well in the '80s.And those things weren't made for efficiency.Consider it a challenge for you.
Squidyman says: May 14, 2014. 3:10 PM REPLYI may take you up on that challenge. I do have all the parts required.... But the 300 watt motor I have is quite heavy so the bike might have toremain stationary until I find a smaller one......
Now to get my parents to let me take apart that old electric bike XD
Random thought..... It would be awesome to be able to run a Raspberry Pi and a small screen off of the bike. If you stop pedaling, your computerturns off!
Squidyman says: May 14, 2014. 3:11 PM REPLYAnd consider that the motors on those bikes were probably 5 watts or less.
http://www.instructables.com/member/Althenuker/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Althenuker/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Althenuker/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Althenuker/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/xarlock667/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/xarlock667/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/xarlock667/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/xarlock667/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/loachridge/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/loachridge/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/loachridge/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/loachridge/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSS
-
http://www.instructables.com/id/DIY-Bike-Generator/
dark-shot666 says: May 14, 2014. 2:52 PM REPLYThat looks like someone would have to put a fair bit of effort to keep the wheel spinning.
Have you considered adding on a freewheel to the rear wheel? Add on another 10-20 pounds so that when you take a break from pedaling, the wheel won'tlose nearly as much rotational speed from the momentum stored in the freewheel. Just an idea.
Solid project otherwise! Great work.
beewrangler says: May 14, 2014. 2:46 PM REPLYThis is a great idea, but if you are only using it to charge USB devices why would you use an AC inverter? The USB standard is 5Vdc. You are loosing aconsiderable amount of energy in the conversion from 12Vdc to 115Vac and then back to 5Vdc. Why not start with a 6V battery and use a zener diode todrop down to and maintain a constant 5Vdc output to a standard USB outlet?
Squidyman says: May 14, 2014. 1:10 PM REPLYA bit of advice....
Make an easier to understand chart on how everything connects with one another.
Nice project!
TorBoy9 says: May 14, 2014. 10:11 AM REPLYVery interesting build, and you've done a lot of work.
You might consider adding a fender to the rear wheel so that scarves and other loose clothing will not get caught in between the belt and the rim. The rearstand will need to be permanently screwed down to the base, otherwise with natural cycling movement there will be a loosening of the belt, resulting in lessefficiency.
A front handlebar bag that has a metal frame could be changed to support a flat surface, which will allow the use of a tablet or smartphone while riding.
Overall a very interesting build.
bugsy_malone 666 says: May 14, 2014. 12:23 AM REPLYI think this is a good way of testing a concept as a bike generator has some potential as an overall power source for small devices. As mentioned it would begood to be able to ride the bike as a bike though as well(maybe build one for yourself), so the next stage would maybe to fit everything you have there actuallyto the bike, then you could go out for a cycle and come back with a charged up battery that you could then plug in a car type mobile phone charger to. Bit of anextreme measure to charge a phone but you get the idea :) or keeping you design as it is, try different motors/generators in place of your scooter one, forinstance a car alternator needs to only spin at about 1000rpm to cut in, and they put out a fair wack of power when connected to a battery, then you couldconnect a mains invertor and run a laptop or something without barely touching the battery, although I dont know how much strain an alternator might put on therider! I have thought about building a similar to test the car alternator theory! The advantage with the alternator is you dont need all the various chargecontrollers, you just have a light which goes out when your up to speed (which can be replaced with an LED/resistors) making it slightly more simple.
xtracycletony says: May 13, 2014. 12:12 PM REPLYCouldn't you have replaced the rear cassette with another smaller pulley and reduce the overall size of the belt? The wheel technically wouldn't be needed,just the hub.
Great project over all though. Nice work.
SKSW47 says: May 13, 2014. 7:15 PM REPLYThe large diameter of the back wheel provides the 2800 RPM that the motor is rated at. It is the big to small ratio that lets us spin the motor fast enoughto create a large voltage.
Mesa_Arch_Man says: May 13, 2014. 4:13 PM REPLYSpelling error throughout article, nice job though.
Peddling is for drugs, pedaling is for bikes!
Maybe get the Arduino to display stats to the rider like estimated calories burned and a high score for the best (fittest) charger!
SKSW47 says: May 13, 2014. 7:13 PM REPLYThanks! We'll fix that. Good Idea for the Arduino.
manuka says: May 13, 2014. 4:33 PM REPLYGood idea, but capable of producing ~50-100 Watts (which is far more than a modern cell phone requires). If you just want to charge a phone then a simpler& cheaper solar charger (running into a simple storage battery of course) will usually do OK. An A4 sized 5Watt PV typically produces ~10-20 Watt.hours perday in even average lighting, which is good enough for daily charging of 2 smart phones. There are now numerous such PV designs around ofcourse,although many "Altoid Tin" versions are too puny unless in bright sun.
Us humans are capable creatures & our legs & hands are better suited to more crafty purposes when needing exercise- gardening, child minding, dog
http://www.instructables.com/member/dark-shot666/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/dark-shot666/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/beewrangler/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/beewrangler/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Squidyman/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/TorBoy9/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/TorBoy9/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/bugsy_malone+666/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/bugsy_malone+666/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/xtracycletony/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/xtracycletony/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Mesa_Arch_Man/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Mesa_Arch_Man/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/manuka/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/manuka/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSS
-
http://www.instructables.com/id/DIY-Bike-Generator/
walking, wood chopping etc !
Fyodor says: May 13, 2014. 12:51 PM REPLYdc to ac to dc,..that should burn off some extra calories. This is a great project for a high school,..but the first time someone gets a finger stuck in the spokesthe Nanny State will shut it down,..if you're in California or New York, that is.
grrr21 says: May 13, 2014. 12:40 PM REPLYvery cool, well written, I need to do this
JanVissinga says: May 13, 2014. 12:10 PM REPLYinstead of a plexiglass stand I recommend using a music stand for the same purpose; easily repositioned and also allowing you to lay down on the steeringwheel. Even a tablet and book at the same time can in that case be used.
This winter, using a music stand, I made my km's training for the spring rides, watching television and more.
kzaccone says: May 13, 2014. 10:11 AM REPLYIs there any way to make this produce more elctricity, maybe with a larger motor, so it could power something like a t.v.?
SKSW47 says: May 13, 2014. 11:31 AM REPLYYou could use a larger motor and a larger battery, but you'd have to be pretty strong to be able to power a TV. If you saved up the energy (ie biked for 4hours, but only watched for 20 min), that might work better.
Stan1y says: May 10, 2014. 1:11 AM REPLYis the inverter phase really needed? All you are doing is converting 12v dc to ac mains )110-240v ac depending pn your country) just so you can connect atransformer and rectifier to knock it back down to 5v dc. would it not be easier just to use car chargers and reduce it directly from 12v dc to 5v dc. or even tapyour battery to get two 6v dc supplies which can then be reduced to 5v with less loss
SKSW47 says: May 13, 2014. 11:25 AM REPLYWe thought using the inverter was safer while we were working on the project (and a cell phone costs more than and inverter). But, it would beinteresting and very do-able to remove the inverter.
chifin says: May 10, 2014. 5:35 AM REPLYWow!! Awesome... Perhaps get some app developers to make a smart-phone / tablet app to wifi (bt) control the Arduino functions... The device could bepositioned at the handle-bars. The app could record the individual users cycle time, charge amount, output amounts. Just going crazy here with enthusiasmfor your project. :-)
SKSW47 says: May 13, 2014. 11:22 AM REPLYWe plan to put the device on a panel on the front, and have a ledge to put homework. There is a lot more to be done in terms of user experience.
RandyPerson says: May 10, 2014. 8:35 AM REPLYYour V-belt is making a pretty tight turn around the small pulley, likely using up energy while not making great contact. Many clothes dryers have a directdrive where a very small pulley drives the large dryer drum slowly, using a quite flat, very flexible and strong belt. Reverse that setup and you'll have themotor zipping along with great efficiency. Best part is, dead dryers are everywhere, so parts should be easy to come by. You might even find a spring-loadedtensioner device, making location of the motor less critical, and maximizing wrap on the small pulley.
SKSW47 says: May 13, 2014. 11:18 AM REPLYThanks for the suggestion! We'll look into it. We can always improve efficiency, but the V-belt seems to be doing a pretty good job for now.
scifiguy451 says: May 11, 2014. 6:06 PM REPLYNice project. I like the fact that it is there for common use.
Do you even need the inverter? The things you are charging are going to be DC. So you are going from DC to AC (inverter) then from AC to DC (devicecharger) and losing a little power both times. Most small electronics use a USB plug to charge, so you could almost get away with having only 5 VDC USBports coming off your battery.
Even laptops' power supply outputs are in the 9-16 VDC range, but the problem there is they don't have a universal plug in. (And some, like DELL, look tosee if the power supply is made by them.) So if you could come up with a laptop plug adapter, you could do away with the inverter.
view all 61 comments
http://www.instructables.com/member/Fyodor/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Fyodor/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/grrr21/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/grrr21/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/JanVissinga/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/JanVissinga/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/kzaccone/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/kzaccone/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/Stan1y/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/Stan1y/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/chifin/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/chifin/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/RandyPerson/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/RandyPerson/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/SKSW47/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSShttp://www.instructables.com/member/scifiguy451/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/member/scifiguy451/?utm_source=pdf&utm_campaign=commentshttp://www.instructables.com/id/DIY-Bike-Generator/?utm_source=pdf&utm_campaign=comments#DISCUSSfile:/id/DIY-Bike-Generator/?comments=all&sort=OLDEST#commentsfile:/id/DIY-Bike-Generator/?comments=all&sort=OLDEST#commentsfile:/id/DIY-Bike-Generator/?comments=all&sort=OLDEST#comments
