Engineering

An unusual explanation of How induction motor works I translate a paper i that was orginaly in hebrew I need also help in spelling and other sugestions see http://mourici.googlepages.com/howinductionmachineswork%28operate%29

Not sure where to ask this, but here goes... It's often said that nuclear power stations do not emit CO2 and so may be able to solve our energy problems with regard to global warming. However, considering that the radioactive stuff is dangerous for at least 100,000 years, and has to be 'dealt with' over this period of time, has anyone ever done the calculations to work out whether more energy is spend dealing with the 'mess' of nuclear power stations over 100,000 years than the ernergy they actually produce in their operational lifetime?

I have a bunch of old circuit boards I've collected over the years, and the sheer mass has grown to the point that I need to do something about them. I saved them either because I could use them elsewhere (e.g., power supplies) or because I wanted to reclaim some of the parts (connectors, gang resistors, etc.). Almost all of the parts in which I'm interested are heat-tolerant. Unfortunately, getting the little buggers loose is turning out to be more of a chore than I anticipated -- I think primarily because the pins are soldered through the boards and not just to the pads. I've had limited success in using a solder-sucker to clean it up. I used to have some …

OK I am here for ideas to elaborate a system to irragate 6 acres of ground using solar energy and a generator to jump start the system. Let me set up the idea here. 300 feet pumped uphill from a water well then 1000 feet to the edge of the property and downhill about 600 feet into pond, overflow going into a creek 300 feet is pumped straight without a break in the line at the turn going across the hill about every 100 feet I will have a drip system that is on/off so that I can water that section using gravity to drain the water back to the pond and/or creek Now to the area that I want to utilyze to produce some electric feedback to charge a bank of mar…

How do tazers work? If it was AC, then it would be easy as a step up transformer. It uses a 9V battery, however, so I have no idea. You can't have a transformer with DC, right?

Someone invent the carcycle. With the transportation capacity of a car, but you pedal it. Like an upgraded version of the Flintstones car. You can advertise it to the environmentalists so that they can reduce pollution. Then the athletes so that they can get a good workout. Also people who want to lose some weight will want to get the good workout. People who want to diminish car accidents will support this, too. It'll make millions. Billions.

There is much talk on the news with are energy problem and some talk about nuclear fusion or cold fusion is this where we use water not oil? So nuclear fusion or cold fusion use water or plasma not fossil fuel? And if nuclear fusion or cold fusion is a answer to are energy problem how long will it take to we have it 20 years or 30 years? And would there be H2O nuclear fusion cars in 20 years? This most be cutting edge technology?

Hello, I remembering watching a video from SIGGRAPH 2006 of this Japaneses research firm using IR lasers to form "holograms" in the air by making small bubbles of plasma in the air which produce light visible to the human eye for a split second, acting much like a pixel. The plasma bubbles were produced by focusing the infrared light from the laser to a point at some distance in the air. I've asked someone who has also done this and they had stated that an energy density of 200mJ per 10ns can create this effect. I don't have the money for a Nd:YAG laser to try this myself, but I was wondering if other forms of electromagnetic radiation can create these plasma…

I tried to enter on this but don't see it, so I will speak without specific manufacturers' names. I got and love the construction of an electric garden cart, delivered for not quite $300, with two powered front wheels and a trailing third, well-castored with a greasefitting. This is a new class of tool(USA in this case) and it perfectly fills my need, carrying loads of firewood, and occassionally road rock mix for potholes. Two hundred pound load, and I don't have to support it. I was going to develop this for $500, and mentioned this a while back. I am 57 years old, live on bountiful land and enjoy chainsawing, but not wheelbarrowing, wood.

A terrific new interview with Artificial Intelligence guru Steve Grand can be found here.

What do you make of this? http://web.mit.edu/newsoffice/2007/crowdfarm-0725.html Apparently, a couple of grad students at MIT proposed a way to power things by the movement of people, in what is called a "Crowd Farm". This is supposed to harness the mechanical energy of the movement of people and convert it into electricity. The way its supposed to work is that you have some sort of mat that, when you step on it, it depresses slightly and this would generate power through the Dynamo Process. Ideas for use range from train stations to concert theaters.

I just watched a show today on the science channel which was about the new spacecraft that is being designed by NASA. The spacecraft, called Orion, is intended to replace the shuttle by the next decade. The show was called Starship Orion. What they talked about here was about the design phase of the spacecraft and how they are progressing so far. They focused a lot on the reentry vehicle as that will be crucial for returning to Earth. I found the show pretty interesting. They talked about data that was collected while testing it in the vacuum chamber, wind tunnel, and even subjecting the material it will be built from to temperatures comparable to that of the su…

can you answer the question mentioned above? thanks!

This might seem supid. How would I make a tracking system using Infa-red or laser and the brain would be a BASIC Stamp 2 that would control four servos retomely?

Hi all. What is the pressure the ice would exert to a rigid hermetic strong enough container if fully filled with water and exposed to freezing ? Miguel

I read an article by ScienceDaily which goes over the possibility of controlling robots and machines by thought alone. Of course, controlling computers via brain-computer interface is nothing new. But in this particular case, these people are exploring controlling a robot, whether it be an arm, or a humanoid one, UAV, etc. Also, invasive brain surgery would not be needed because an EGG would translate the brain signals into digital commands. This article deals mostly with control over a humanoid ones. Here are some of the details: "Objects available to be picked up are seen by the robot's camera and conveyed to the user's computer screen. Each object lights up ra…

Hey guys, As I promised, I have another question in the series of "Help me be a good equipment-mastah" topic I have a question that goes as follows: At work, we have about 20 chargers for magnetometers (we have more devices, but they're not all charged at once) and about 30 for motorola 2-way radios. Up until a few days ago, almost all of the chargers were connected to about 2 electricity sockets. I changed that for now to have about a limit of approximately 8 devices per socket (out of - for now - limitations of room, sockets and chargers). How do I figure out how many chargers can "sit" on the same socket without us waiting a few DAYS for the device to …

How do machines like robots and spaceships detect damage when it is done? Do they have some type of mechanical or robotic nerves that give it the ability to detect damage amongst itself?

Ever witnessed a flying saucer (sometimes called "UFO") which flies at extremely high speeds and pulls off right angles and maneuvers that would tear any other flying machine into a million pieces? Read on... Many people report that the UFOs they have witnessed glow bright colors, sometimes they even have high voltage lightning shooting off of these ships. Often the UFO (space ship) will glow purple, green, orange, or red. The key is that you realize electricity at high voltages can cause the air around an electrified device to glow different colors, all depending upon what sort of atmospheric gases are around the flying craft. (in much the same way your flourescen…

Hello, I am currently engaged in building a prototype. The main problem I am having is my battery running out of juice too quick. The main component is using a 5v brushless motor. I dont know much about batteries and I have been using a standard 9 volt in my rough prototypes. I need between 2 to 4 hours of run time to make it viable and so far I have been able to eek out 45 mins on a fully charged 9 volt. I have also been looking into rechargeable battery packs like the ones in cell phones and even the ones that are like 5 AA wrapped up and put out 6v. My question is what type of battery should I be using for battery life to get me as close as possible to my goal with out…

I`m sure most car owners have heard of these or have seen them in TV shows or in movies. often as a tank under the seat and switch on the dashboard that gives instant extra acceleration. now from what I understand the Nitrous Oxide simply provides extra Oxygen to the fuel mix. so why isn`t Oxygen itself used!? it would last loads longer as all you need to do is Up the 21% oxygen already in the air, so a slow input of pure O2 into the carb taking the percentage up a few points to say 25% should do the same thing surely?

I sense that few viewers or contributors look at and consider examples of either existing Engineering or proposed solutions as posing either poor results or needing improvement through further consideration. In less words, as an Engineer, I look for, and often find, examples of engineering results in products which are poor or improvable, and that troubles me. Would it not be valuable for both up-and-coming Engineers, as well as established ones, to discuss method and product improvement possibilities in this Board? imp

Hey guys The people in my workplace use a bunch of electrical utilities that is - currently - equated to a bunch of crap, due to mishandling and bad maintainance. Since I repaired a few malfunctions, my boss has decided to put me in charge on the equipment in general. The problem is that my knowledge is limited So. I must have some help, so expect a few questions from me in the next few weeks, months, years, however long it'll take to fix the pile of rotten metal to make it appear to be a functioning equipment set. First order of business - Batteries. We work with magnetometers and when I opened them I found most of them are using a pack of 7 recharg…

i've got an old x8 cockroft walton voltage multiplier in a parallel config, i'm looking to get it running again after it fried my oscillator on a number of occasions. what type of oscillator would i be able to run it off? considering it tends to drop it's guts through the oscillator lead as well as the output. it's limited to 100v due to the caps i used

A detonable material, such as ammonium nitrate for example, dissociates extremely rapidly into its basic constituents. This process is generally referred to in terms of "detonation velocity". Does anyone have some ready information regarding what means are used to determine detonation velocity? Is it actually measured? I cannot imagine laying out a mile-long length of detonating cord and measuring its "disappearing time". imp