Project of science I
Asked by logesh mlasj 4 years ago | last reply 4 years ago
Project of science I
Asked by logesh mlasj 4 years ago | last reply 4 years ago
Asked by chitbaks1 9 years ago | last reply 9 years ago
Asked by ThejasV 3 years ago | last reply 3 years ago
I live on top of a tall hill were the wind is always blowing at a constant 10 mph, and my electric bill keeps going up and up. So, the idea I have was to make a windmill that is powerful enough to generate between 8000 watts to 12000 watts. I want the design to be efficient, but at the same time not an eye sore. I figured that that just one windmill would need a 20ft propeller so I am leaning more to a series of windmills. I need some more information on the cost, and the design aspects of one or more windmills. If anyone has experience on this subject I would appreciate any information.
Posted by Sedgewick17 10 years ago | last reply 10 years ago
Pls help for circuit
Asked by shivi_dubey02 9 years ago | last reply 9 years ago
I know the electricity from the windmill gets converted to 120V AC but doesn't there need to be some sort of phase matching with the home AC? The home is still hooked up to the utility grid and the windmill is just meant to offset what is taken from the grid.
Asked by alchemistdagger 9 years ago | last reply 9 years ago
I need to lift water from the higher tank to the lower tank ( against gravity)...i difference between tank a and tank b is 20 cm only
Asked by lulu114 6 years ago | last reply 6 years ago
1. The system will be tested for 6 minutes in door using one fan that generates “wind” at three different speeds (Time starts when the fan is turned ON giving 2 minutes for each speed starting with the lowest speed). The fan is provivded 2. The setting of the filled lower tank and upper empty tank is provided by the organizer. The details of the setting 3. The minimum distance between any part of the system and the fan should be at least 190 cm. 4. All material used in the systems must be safe, harmless and accessible to everyone in normal market. Systems should need no safety protection and no grid electricity 5. Electric or electronic components are not permissible. 6. The cost details of the system components should be prepared and presented by each team. 7. Each team will be given 5 minutes to demonstrate all aspects of their system. 8. Each system dimensions are limited to 100 cm width, 100 cm length, and 180 cm height.
Asked by lulu114 6 years ago | last reply 6 years ago
The windmill on the car doesnt work as your adding more force in the opposite direction to the work done by the engine. What about using the frictional energy on the face of bigger vehicles like trucks and buses that exist already to run a small windmill. Probably charge a battery or use it effectively in some other way. I cannot see a direct negative to this except finding the way i can place a turbine without increasing the opposing force and using as much of the existing one
Asked by ShankarRam 9 years ago | last reply 8 years ago
I bought a small brush-less motor that was designed as a motor for a small RC plane. I tested it by spinning it with a drill. I was surprised to find that the motor did not generate much in the way of voltage. Why not? It's too bad - many small brush-less motors are so nice. No brushes, ball bearings, and low cost. I would have thought that forcing a brush-less motor to spin would have generated power. Thanks for any insight.
Asked by jimk3038 8 years ago | last reply 5 days ago
Just wondering, can putting a small windmill on top of the car to produce some electricity and charge a battery pack, and the battery pack can be brought everywhere so whenever we need to charge our cell/iPod, we can just hook it up?? Will it be efficient??
Asked by huang.wencong 9 years ago | last reply 4 years ago
Hey everyone a while ago I was cleaning out my closet and found a little micano car, it had a motor on it I was wondering is it possible to use that to generate a little bit of wind energy, if so can someone who knows alot in this field explain how to I intend to have it as a show thing and is it possible to have different colored LED's and if it is windy it will light the all 3 and if its not it will light like 1 or 2 sort of like a wind gage. Anyway thanks for reading sorry if this is a stupid idea.
Posted by trucker1278. 3 years ago | last reply 3 years ago
Asked by Ifthikar Ahamed 9 years ago | last reply 9 years ago
Great project Steve! my dad lives offgrid in the high desert of oregon: state thus far he uses several dc mills and solar panels.i greatly look forward to building this project with him in the future.also i wanted to compliment you on your willingness to explain and re-explain already stated facts......i first read and looked at your steps then took the time to read all the "Q&A" (yeah all 562 of them).after having done so i have no questions other than how large is your bank and what type of batteries did you go with?(we started with a bank of 32 12v ,but are now replacing them with long life deep cycle 6v cells)<large investment cost has us gathering them a few at a time.its great to see so many people gaining interest in going green.This project is without a doubt the best mill ive seen and your patience/willingness to let others pic your brain and promptly kick back thorough and accurate answers is commendable..most prodigous!looking forward to checking out all the links you provided. best personal regards, Luke A.R.S KV7M
Asked by Coolhand Luke 9 years ago | last reply 9 years ago
I have a old direct drive turntable. This is not like a Technics deck where the magnet is connected to the platter. The platter of the turntable just sits on the pin while the motor and magnet is all self contained inside a casing under the platter. Is it possible to make a generator from a motor set up like these ?
Asked by aaronanalog 9 years ago | last reply 9 years ago
Hi there, I'm rescuing an '72 all-wooden yacht (18ft) named Knights of Ni; the woodwork and painting are mostly done and I'm now busy with the electrics. It has a 12V system running of a car battery which is powered by a small solar cell and if necessary I can charge it on land. I was wondering though, whether it is possible to mount a small windmill on top of the mast using for instance the van of a vacuum cleaner and a bike dynamo (or anything else not too big and heavy), and then running a wire through the mast to the battery. I would be very grateful for your advice. If you want/need to see more pictures of the boat please give me a shout. Greetings from Holland, Barbarossa
Posted by Barbarossa 7 years ago | last reply 7 years ago
A 5 blade rotor. making our own replacement blades a fair bit o' resestance to rotation from the generator, therefore, balancing it on the generator shaft is probably a no=go. the owner, for whom i'm doing the work suggests balancing 2 blades against one another. But there are 5! not 2 or 4. maybe we make it a 4 blade... maybe we make sure each blade is excactly the same weight AND with CG at the same distance from center (sounds cumbersoe to get both mass And cg identical. suggestions?
Posted by Toga_Dan 4 years ago | last reply 4 years ago
I'm building a small windmill, I need it to be as efficient as possible. What is the best desgin for a blade that is about 25 cm long (diameter)? And what kind of material should i use to build it. I'm hoping to not use wood, because its kind of hard to cut it into good blades.
Asked by georgexu316 9 years ago | last reply 8 years ago
Of the various renewable energy sources out there, solar and wind are among the most popular. Already windmills are springing up in various parts of the country. This got me thinking, what if you used some of that space on the windmill to harvest some energy. For example, what if you attached solar cells to the windmill rotors of tower to harvest extra power. What do you guys think?
Posted by purduecer 9 years ago | last reply 9 years ago
About two years ago, a number of groups at Burningman had LED displays on the blades, powered by the same Windmill. The displays on each of the the blades could be programmed with different sequences of tri-colors to form art or pictures. I am looking for someone to instruct me (an electronics idiot) or preferably build the parts necessary to put a similar unit up in the rural area I live in. The locals would be amazed (virtually no intelligence regarding technology!).
Asked by Kole951 8 years ago | last reply 8 years ago
I found some good designs on here that I can use, but I need some various blade designs so I can switch out the blades and do my experiment. Trying to help daughter with science project.
Asked by laz1 9 years ago | last reply 9 years ago
I'm looking at adding a not too obtrusive wind generator to a house I just bought. One of the best I have come across is the honeywell BTPS (Blade Tip Power System) - it isn't as sleek looking as a lot of the turbines I am looking at, but it seems like a good concept to me. http://www.earthtronics.com/honeywell.aspxI can't believe that this company is the first to come up with the concept; has anyone here seen any other similar systems, designed to run in the lower speeds/altitudes common in a smaller residential setup, but generating decent power?
Posted by karossii 9 years ago | last reply 8 years ago
Can an auto generator be used for a windmill? They spin at high and low rpms and are plentiful. They generate 12 or more volts here in the U.S. I am new to this and just trying to cheap out I guess. Thanks!
Asked by Belmont1 9 years ago | last reply 9 years ago
The windmill is very small - probably about five feet tall, judging by my own height. It is very simply four posts holding up a rotatable windmill / fan with a tail. Both the fan (the blades) of the windmill and the entire top piece (the fan and the tail) rotate. It is a little rusted, but still works perfectly - as evidenced by the creaking and squeaking we heard on a windy day! It can work up quite a bit of speed. Unfortunately, due to the wind, we also get a lot of power outages. I don't expect that such a small windmill could power an entire house, but if it could power a computer or a freezer/fridge we'd save a LOT of money -- every time the power goes out my mother's computer fries and all the food we just bought goes bad. Is it possible to turn this into any sort of generator? (The windmill is outside and while we DO have windows leading in I don't want to encourage any critters. HOWEVER the windmill IS near a door from our garage that no longer opens, but does have an old, unused dog-door.)
Asked by Inept-Parrot 9 years ago | last reply 8 years ago
Feel Good Inc. Music Videowindmiil windmill for the landturn forever hand in hand take it all in on all your stride it is breaking falling downlove forever love is free now turn forever you and mewindmill windmill for the landis everybody inFeel Good Inc.Gorrilas
Posted by dammoonnm 12 years ago | last reply 12 years ago
Asked by trentyuhas 9 years ago | last reply 10 months ago
LED blades windmill - design and/or build the components ? About two years ago, a number of groups at Burningman had LED displays on the blades, powered by the same Windmill. The displays on each of the the blades could be programmed with different sequences of tri-colors to form art or pictures as the blades rotated. I am looking for someone to instruct me (an electronics idiot) or preferably build the parts necessary to put a similar unit up in the rural area I live in. The locals would be amazed (virtually no intelligence regarding technology!). Top of Form 2
Posted by Kole951 8 years ago | last reply 8 years ago
I wouldlike to up the wattage coming in from my windmill to my batteries.
Asked by swat420 9 years ago | last reply 9 years ago
I want to build a tiny bike mounted wind turbine to power a white super LED light. What type of electric motor-generator would you recommend and what kind of LED? Would it require any other things like a heat sink? Off topic extra info: I'm thinking of running it directly off the windmill or maybe sending the output of the windmill to a rechargeable battery and running it off that. I only understand basic electronics, so please dumb down the responses :P Thanks in advance.
Posted by horsebones 7 years ago | last reply 7 years ago
I would like to use bike gears to switch gears eighter clockwise, or counterclockwise on a vertical axis windmill for pumping water. The purpose is to slow down the speed of the spinging rotor or switch it intoa idler gear, to allow the rotor to keep spinging, and to disconnect the water pump, so it wont' be damaged in high winds; Also not to slam the rotor to a sudden stop, by ingageing a brake. I am building this not only for myself, but also my church for them to give away free to needly people around the world. Thank you for any and all help in this matter.
Asked by robertbarfield 9 years ago | last reply 9 years ago
I once heard that you can take nearly anything in electronics and use it in reverse, headphones to a microphone, a radio to an fm transmitter... well i have 2 small motors, one from a cd reader (the part that spins the cd) and one from a pencil sharpener. They are pretty straight forward... connect a battery to them and they will spin, but if find some way to have them spin, will it give me electricity back? i want to make a mini windmill... is it possible is there any other additional wiring I'll need to do? thanks...
Asked by davej6694 8 years ago | last reply 11 months ago
This is not a scan of the original book, but the original book converted to text with OCR, and strictly proof read with QC controls. Thus the charts, formulas can be copied and pasted into something else. www.gutenberg.org/etext/27257 ELECTRICITY FOR THE FARM LIGHT, HEAT AND POWER BY INEXPENSIVE METHODS FROM THE WATER WHEEL OR FARM ENGINE BY FREDERICK IRVING ANDERSON AUTHOR OF "THE FARMER OF TO-MORROW," ETC., ETC. New York THE MACMILLAN COMPANY 1915 PREFACE This book is designed primarily to give the farmer a practical working knowledge of electricity for use a slight, heat, and power on the farm. The electric generator, the dynamo, is explained in detail; and there are chapters on electric transmission and house-wiring, by which the farm mechanic is enabled to install his own plant without the aid and expense of an expert. With modern appliances, within the means of the average farmer, the generation of electricity, with its unique conveniences, becomes automatic, provided some dependable source of power is to be had—such as a water wheel, gasoline (or other form of internal combustion) engine, or the ordinary windmill. The water wheel is the ideal prime mover for the dynamo in isolated plants. Since water-power is running to waste on tens of thousands of our farms throughout the country, several chapters are devoted to this phase of the subject: these include descriptions and working diagrams of weirs and other simple devices for measuring the flow of streams; there are tables and formulas by which any one, with a knowledge of simple arithmetic, may determine the power to be had from falling water under given conditions; and in addition, there are diagrams showing in general the method of construction of dams, bulkheads, races, flumes, etc., from materials usually to be found on a farm. The tiny unconsidered brook that waters the farm pasture frequently possesses power enough to supply the farmstead with clean, cool, safe light in place of the dangerous, inconvenient oil lamp; a small stream capable of developing from twenty-five to fifty horsepower will supply a farmer (at practically no expense beyond the original cost of installation) not only with light, but with power for even the heavier farm operations, as threshing; and in addition will do the washing, ironing, and cooking, and at the same time keep the house warm in the coldest weather. Less than one horsepower of energy will light the farmstead; less than five horsepower of energy will provide light and small power, and take the drudgery out of the kitchen. For those not fortunate enough to possess water-power which can be developed, there are chapters on the use of the farm gasoline engine and windmill, in connection with the modern storage battery, as sources of electric current. www.gutenberg.org/etext/27257
Posted by Lateral Thinker 9 years ago
I was reading the comments in this Ible: https://www.instructables.com/id/Parasitic-Wind-Turbine/ and they said that having the turbine in the way of the airflow would create more of a load on the A/C thereby causing it to use more energy. I don't understand it in this case. I can see how putting it in line, mounted to the exhaust port, thereby blocking the exhaust would restrict the airflow. I don't see how using the already exhausted air would restrict the airflow. That, IMO, would be like saying that when you are stopped at a red light and another car is behind you, your engine is working harder because that car is behind your exhaust. Am I thinking right on this?
Asked by Zippomanonfire 9 years ago | last reply 9 years ago
Hi there, I figured Id post here because I have no one to ask and answers aren't obvious from googling. The connection is as follows: - (0 Volts to 40 Volts open voltage) Windmill to a 12 Volt Battery. - (0 Volts to 20 Volts open voltage) Solar Panel to a 12 Volt Battery. A solar panel has an open voltage @ 19.95 Vdc and delivering 0 amps. The panel is not connected. Then I connect the panel to the 12 Volt Battery. Now, the solar panel now shows a voltage of 14 V and delivering 2 amps into the battery. That makes sense to me. When connecting the solar panel to the battery, the system is now "on load", so the voltage drops. But because the voltage drops, the amperage is being sent into the battery. ---- Now, The windmill has an open voltage between 0 and 40 vdc. On average it shows 20 volts when spinning. 40 volts when its faster. Its known that it takes 14.1 volts to start charging a battery. So, now lets assume the windmill is spinning @ 40 volts open voltage. I connect the windmill to the battery. For under a second, I see amperage go from the windmill to the battery. The amperage amount is 3 amps for 1/4 a second, 0.6 2/4 of a second, then eventually 0. The voltage after connecting the windmill to the battery is the same as the battery voltage. In my eyes, its not charging the battery, because amperage dropped to 0. As a side note, as soon as I connect the windmill to the battery, the generator/turbine, also slows down in speed. I am also curious to know why it is slowing down as well. Anyone have any ideas? - U
Asked by useful1 4 years ago | last reply 4 years ago
How do you add the output from devices which are generating distinct voltage and currents? Two windmills for example or a windmill and a solar cell.
Asked by mkcimini 9 years ago | last reply 9 years ago
When the wind changes direction, doesn"t the wires eventually twist and bind? Do I need to prevent it from turning 360*
Asked by robertlelliston 9 years ago | last reply 8 years ago
I am looking for tips on creating a small windmill to charge a twelve volt battery. what is the best type of motor to use? Does anyone know how to make a charging circuit, so that even when the winds are low, it can charge the battery? What is the best type of battery? Are there any other questions i should be asking about wind power, and what are the answers to them?
Asked by cyc4015 9 years ago | last reply 8 years ago
OK, I have an idea that sounds kind cool but no working knowledge of electronics. How difficult would it be to make a bank of wind powered LEDS? A circut that progressively lights up more leds as the wind kicks up to a higher speed?
Posted by Eye Poker 11 years ago | last reply 11 years ago
Which is better for making a homemade generator powered by the wind? Tesla model suggests coil spins inside of magnetic field but most electronic sites suggest having the magnets spin inside the coil windings. Are more amps produced by having the magnets spin inside the coil windings instead. Couldn't you just use most any (machine pre-wound) coils from motors rated from 1 - 5 hp. and make your own rotor where the magnets spin INSIDE the existing windings from those motors? Helpful to me since they are already rated with rpm speed. Why would you make your own with so many used motors available?
Asked by SpeedRacerTerri 9 years ago | last reply 9 months ago
Asked by nandanshah 8 years ago | last reply 7 years ago
I'm starting a project. and wanted to know the best way to tackle it. The wheel is the size of a cd not including the tire. I wanted the four wheels to generate power to make the battery's last longer. Any ideas would be helpful.
Asked by SYMMETRY 9 years ago | last reply 9 years ago
Im currently building a windmill, and For the blade design I was thinking about going with something like this: https://www.instructables.com/id/Ted-Baer-s-Bicycle-Wheel-Windmill/ and I could use some help with figuring what the actual shape of the blades would have to be cut into, to fit onto the rim. thanks:D
Posted by jakem456 8 years ago | last reply 8 years ago
Hi All, I want to make mobile charger with wind power like when i am bike/car/public transport at 60km/hr, i should able to charge my mobile. power genrated should be 5 volt at 2 amp. Could you provide me idea to construct one?
Posted by vindude5 2 years ago | last reply 2 years ago