Device Definition and 531 Threads

I wonder if it's possible to create the laser listening device as a project . i 've been fascinated by the idea ever since i saw it on SPIES It'd be a great help if anyone could could tell me how to get started first ,like how does the thing actually work n how to create a laser n stuff .

Please don't beat me up too badly. I ask this in all sincerity. A very small device adds energy to a system primarily via radiation. Temperature differential is high—at least 1,500°F. The system itself is rather massive—tons. Intermediate heat transfer is via forced convection of a...

How does sound travel from the musical device to the heaphones through the wire? I'm trying to understand the process the music/sound goes through along the wire to the headphones. Thanks!

hi all does anyone knows how a spring locking mechanism in a micrometer torque wrench works? thanks regards ss

What is the name of the device used to measure ohms? :confused:

I need to design and create some sort of device to measure an interval of time between 10 and 40 seconds. I can't use any electrical or mechanical things. I had ideas of puting water in a funnel and letting it fill up a cup in which I've measured how much water equals a second for example. I...

Hi. My PC says he couldn't found SATA device. But I don't know the importance of it. Can you give me some information about it? And I also wonder that, can it be a fatal error? Thanks..

http://www.indiadaily.com/editorial/12-04e-04.asp Anyone have more info about this and what's going on?

i was wondering if using the principle of lightning and how it works, could be harnessed to make a anti-gravitational device using strong electromagnets and a enormous amount of power. but in theory could it work?

Perhaps you’ve heard of Troy Hurtubise. He’s the guy who built all those bear proof suits a while back in the hopes that he could one day survive a grizzly bear attack. He was also featured on the Canadian Discovery Channel a couple of times since then for his invention of a cheap and effect...

Also known as the "Levitron" Have you seen this Amazing Anti-Gravity top with the catch phrase "A challenge to master, A miracle to behold" I would have written it "A miracle to master, a challenge to behold" According to the pictures on the box I was expecting this top to hover in mid air...

Hello. Take a look to this page: www.geocities.com/nayado/ You all know that in a normal induction process, a back-emf is generated that tends to oppose current flow. All our motors, generators and devices work like this: You introduce a flow or movement, and the device operation will...

Egg Drop Device! I have to create an Egg Dropping Device for my Physics class using these materials: 10 straws 8 x 8 cardboard piece cellotapes (to attach the joints and nothing else!) The egg must survive a fall of about... 10 ~ 15 feet I assume... Please feel free to post...

I've just got my final year project assigned. It has to do with a numerical simulation of a Ram Accelerator device. Well, apart of having doubts, which I will post just here proximately, I would want to know some website to learn more about that type of device. Apart of Google sites...

Well, it's more or less for robot constructon thing. Does anyone know if it's possible to construct a small EMP device that'll only have a couple meters worth of area effect? If there is, any hint on how to do it, or how much it would cost? Everything that I've found so far includes some type of...

I am doing a project called "gravitational waves in the rubber universe" and am looking for a little help. The idea is to make a cone shape from latex and roll a ball-bearing around it (a bit like those donation boxes where you put in a coin and it rolls around in circles until it falls in the...

In science we had to build a device which, when dropped 3 stories onto cement, should not allow an egg inside inside of it to crack. One of the follow up questions says : Why should your device accelerate slightly slower than the gravitational acceleration of 9.8 m/s/s " - I can't understand why...

http://www.alexchiu.com/affiliates/clickthru.cgi?id=mikolaj Did you see and what do you think about that ? Can it be true?

I'm interested in doing a science project involving pelter junctions, not involving circut board kinds of things. http://www.popsci.com/popsci/auto/article/0,12543,683524,00.html Something like that would be good, with variables

I make a perpetual motion device. It is a kind of overbalanced wheel. :wink: It is very simple mechanism. I am trying to make its prototype (or toy model). It is on paper now. :confused: I am trying this month only. After that I will cut my drawing in ten (10) parts.I ll release all drawings...

This thought was inspired by reading the other thread "perpetuum mobile" where ZapperZ posted an interesting (but of course flawed) perpetual motion device. It was fun to analyze and to figure out why it didn't work and I was wondering if anybody else had neat ideas that seem to very...

Found an interesting link about a supposed kind of mind control device called the LIDA machine, anybody know if this is for real or if there is anymore information about it. see: http://raven1.net/lida.htm EDIT: I seem to remember richard dawkins being subjected to some sort of (electric...

Hello, I am stumped on this question from my textbook: I tried by using this equation which I felt should work: But it doesn't seem to get me the correct answer (which is 22 ohms). Any ideas? Thanks!

I've heard about some small chip of some kind that has termendous cooling power when a current is run through it. Apparently it is a high efficiency alternative to a large refrigerator when it is kept in a small, enclosed area. It's equivalent to something like 10 bags of ice or something, I...

Hi all, I'm looking for general information on an inductor type device which transfers AC power to a seperate, unconnected (but nearby) inductor. If I were to try googling it, what should my searchword be?

Does anyone know how to build a device to detect subatomic particles (electrons, muons, neutrinos,, and the like...?) Please, if you do, send me some instructions. Thanks.

http://www.tdimension.com/news.html I believe TEN had mentioned that these things wouldn't work in a vacuum due to ionized air flow. Well here's a lab who did sucessful testing in a vacuum. I'm sure there's a reason this cannot be harnessed, but maybe someone would fill in the blanks for me...

first thing, do you think such a device can be technologically feasible? do you think we need it? i think if we can build such a device why not?! i think the advantages of it are more than the disadvantages.

Yeah I know thermodynamics says it's a scientific impossibility, but what is the closes inventors have come to a free energy device? Or what is the best energy producing system out there for its size[?]

A laser is a device that uses light flashes to excite the atoms so you get electrons with energy levels about 2 or 3 levels above the ground state. They emit photons, which vibrate at a particular frequency, they get reflected off the half silvered mirror, to excite electrons and make them emit...

My CD_RW drive died last week and I just bought a new one. I made it the master, and the CD rom the slave. Since doing this the drive names have changed letters. I assume that is a normal thing. But also now my computer no longer recognises any imaging devices connected to my USB ports...