How do I build an electric water pump?
123725
Depends on your application.\n\nPump water from a shallow (less than 20ft)or deep (greater than 20ft) well?\nHow much volume(gpm) and pressure(psi) are you looking for?\nBased on standard house current at 110VAC or off of a car battery(12V) and how long do you plan to have this pump running (few minutes at a time or hr's or day's on end)?\n\nYour question can be simple or a major under taking. \n\nA simple pump, using an old washmachine pump and motor you can come up with a basic pump. This will work on a shallow application, meaning the pump can't draw water from a resavoir being very deep, maybe a few feet. \nA sump pump is also a very shallow well type, works from a jet principle, but can't deliver a lot of pressure 10-15psi for a short period of time.\n\nWater wells which are deep, > 30ft, usually have the pump submerged into the water which then pushes the water out vs drawing the water up.\nSome of the older pumps were of a piston design, inefficient compared todays jet pump standards.\n\nOtherwise an electric moter and a mechanical pump.
480327
You need a tank full of water to start.\n\nCoach
295691
You're going to need containers to move stuff around in which fit closely to the tubes, the tubes themselves, and then an air compressor or vacuum pump to blow them around.\n\nThe link below is for a company which will build it for you. I suspect that not many people build these themselves.\n\nGood luck!
4218
Well it is pretty easy to build a simple motor. There are instructions at this website.
294472
Electric Discharge Machine
42284
Call 1-800-HP invent for customer support.  They can probably guide you in the right direction.
79019
http://builder.com.com/5100-6373_14-5109284.html has a\nmini tutorial on it for you
381528
Try one of these --> http://images.google.com/images?svnum=10&hl=en&lr=&safe=off&q=electric+shocker&btnG=Search
339931
Did this way back in Boy Scouts....Relatively easy...just need to build 2 electromagnets and a series circuit..... I'll see if instructions are online.\nhttp://www.terrax.org/comm/morsecode/buzzer2.aspx\nhttp://chss3.montclair.edu/~pererat/perbuild.htm\nthe second one is similar to what I built
92714
First of all the correct name of that machine is "Van De Graaff" Generator; named after the person who invented it.\nSecond, congratulations on your choice. I won a science fair by making one. I can assure you that the home-made ones are safe; the voltage gets high but not the amperage. Actually I play with it, sparkling by my fingers (I do not suggest doing so for a long time). The problem might be that, it terribly ionizes the air; not so good to breathe.\nAnd finally I have build mine base upon the article I have mentioned here as source.
644690
yes its possible. yes a few people have already done it.\n\nit takes 24 volts DC (2 car batteries) passed across a pair of platinum electrodes within a vessel of deionized water. you must exclude all air from the vessel prior to starting the process. also there must be a divider within the vessel so that when the hydrogen and oxygen separate (one gas type bubbles up from each electrode)\n\nnow you can compress the hydrogen and use it as fuel. (it takes 5 psi to run in a standard carberated engine)\n\nOR\n\nyou can store hydrogen in beryllium as it absorbs H2 readily at high pressures and releases H2 at low pressures for use with a fuel cell and because it is trapped in a block of metal no O2 can get to it to cause it to burn in storage.\n\nnow here is the problem with using this as a wide spread fuel.\nit takes more energy to create it than it puts out. unless you want to build a big solar array to convert a little water, it just doesn't fly.\n\nnow some people are working with collecting H2 emissions from some varieties of algae. now that looks promising.
14604
The electrical relay is usually controlled by a very low voltage, usually that of a digital electronics circuit, with a range of 0 to 5 volts.  The relay itself, of course, is also rated to carry a particular maximum analog voltage being controlled by this 'switch'.\n\nTo get a computer to control this, it is probably best to use existing hardware designed to do it.  Back in the 80's (and they are apparently still around) I've used an Optomux board which had a serial interface to which I could connect a computer.  The Optomux serial 'protocol' seemed to work very well for this purpose.\n\nThe computer would send commands over the serial port to control the board to turn relays on and off for controlling pump motors.\n\nIf you want to do this raw, you will definitely need a UART for communication as well as the relays and any interim digital/analog conversion chips.
82223
Distill the water. The WATER comes out of the tubes, not the salt.\n    As for testing, just drink a little of it. Do you *LIKE* it?\nNo? Well you better make sure that you don't put it back in the same cup you used for collection.\nOK the water will still pass an electric current through it if it has any impurities. Completely pure water will not.\nUnless you use more than around one volt, in which case the bubbles you see escaping will be hydrogen and oxygen. That means you've gone too far with the testing part.
531350
you could do a project of 'rain harvesting'\nconstruct a house,surrounded by a small canal -shaped tank which can hold water when it rains use this water (after purification)for various odd uses.\nit works if you use small plastic tubes as canals\n    OR\n a sugarcane industry is a very good idea(i got a prize for this.)\nbut you need to make crusher,purifier,separator,and drier made of steel or iron.
370604
Attach a bare wire to each terminal and dip the ends of both in salty water. Bubbles will form near the wires as the electricity breaks the water and salt molecules into their constituent gaseous elements. \n\nBy the way, with salty water you will get hydrogen and chlorine, but not oxygen. The salt is needed to make the water conduct electricity, but it also prevents you from getting oxygen gas from the water. You can do this experiment without the salt, but you will need WAY more than 9 volts. In that case you would get oxygen.
361811
A bicycle seems like a good base. If you connect it to a automotive alternator and 12v battery you can produce and store power using cheap available items.\n\nIf you want 220 volts, you can buy inverters that produce it from a 12v battery, again using "off the shelf" equipment.\n\nHappy cycling cause I think you are going to find the human body quite limited at power production.\n\nps, To build something using the items I suggest would mean supporting the bicycle, hopefully you could use the wheel as a pulley without its tire and drive the alternator (having the gears of a standard bicycle being better than an exercise bike to try and match the ratio you need) Since we're not talking much power, the drive belt wouldn't need to be too technical but you may want to change the pulley on the alternator to something wider to match the wheel. If your bicycle support is bolted to a piece of plywood laying on the floor, you should be able to bracket the alternator to that plywood and keep the belt tight enough.\n\nThe electrical connection is fairly simple, connect the big lug on the alternator to the car battery +ive and the casing to the -ive. You will need to connect a small indication light between the small lug and the +ive as this is part of the charge circuit. I suggest a ammeter in the circuit to prove the doubting people on here they are wrong and that you can drive a charge current into the battery but don't buy one with too big of a range :-)\n\npps Try to select a low power alternator (off a small car). \n\nppps If you want to do this without incurring a large expense, you need to make best use of parts that are readily available and do the engineering to suit. If this is not your best subject, you may need to seriously consider whether you want to waste any time any money attempting it.
962
I could suggest several considerations.  First P=IE, that is Power equals the electrical current (I in Amperes) times the voltage (E in volts).  Current is like the flow of water in a pipe and voltage is like the pressure causing the water to flow.  If you use the water to drive a hydraulic piston (say to hoist an automobile for repair) you can use either a small piston and high pressure or a larger piston and lower pressure.  Which is more cost effective?\n\nIn the United States, electric power is delivered to neighborhoods using three wires (three phases) strung along telephone (power) poles.  Only two of the wires are led to a single residence but the neighborhood must use all three wires to balance load on the wires.  Within a house electricity passes from only one wire (phase) to ground or earth to light a lightbulb which uses 110 volts.  The clothes dryer that needs far more power is connected between two of the supply wires (two phase) and to ground to supply 220 volts.  A machine shop might connect a very large motor to all three supply wires to obtain even more power at 440 volts.\n\nSix volts or even 12 volts DC in an automobile circuit can be touched with little danger.  It is less dangerous to accidentally touch a 110 volt AC wire than a 220 volt source and 440 volts is most dangerous.\n\nTherefore, the selection of voltage depends in part on safety and then on the size of the job to be tackled and also economic factors.  The higher the required current, the larger the required wires using expensive copper.  Increasing the voltage reduces the needed current and reduces the needed copper to do a given job.  The higher the required voltage, the more expensive the required electrical insulation will be.  Engineers must determine the best trade off of many factors.