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PhysicsForums Current Divider Rule  
07:13 29-Jul-07   [Replies: 4, Views: 207]    By: Unnamed
Hello everyone. im amit, newbie in this forums, hopefully im posting my question in the correct one. anyways, i was trying to solve this qustion from last semester considering the attached image as ...
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PhysicsForums induced charge in coil from other static coils?  
12:59 28-Jul-07   [Replies: 5, Views: 118]    By: Unnamed
Hello ALL, I have a question about magnetism and generating electricity in a coil from a group of another coils that are alternately switched on/off (cascade). Would a current be generated from ...
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PhysicsForums Connecting IPod to Amplifier.  
23:22 27-Jul-07   [Replies: 5, Views: 284]    By: Unnamed
I've got a sony home theater system and my dvd player has gone for repairs. I've got a party to throw by tomorrow and I need some help. I want to connect my IPod to the HT system. The only problem...
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PhysicsForums Bad Circuits -- Test Your Knowledge  
21:47 27-Jul-07   [Replies: 161, Views: 4461]    By: Unnamed
We were having a discussion in a different thread about the fun sections at the end of each chapter in "The Art of Electronics" by Horowitz and Hill, where they show simple schematics as exa...
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PhysicsForums correct series-or-parallel-or-off switch wiring?  
14:04 27-Jul-07   [Replies: 1, Views: 82]    By: Unnamed
Is this a correct way to wire a DPDT toggle switch so that you can run current through two identical resistance heaters either in parallel or in series (or not at all, so that you have off/half/full p...
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PhysicsForums Factors affecting signal strength.  
07:52 27-Jul-07   [Replies: 4, Views: 159]    By: Unnamed
I have investigation on measuring the factors the signal strength from the transmitting antenna. I have some idea about measuring the signal strength. Is it true to use field intensity meter to measu...
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PhysicsForums Affect of -40C temperatures on a LCD display  
00:36 27-Jul-07   [Replies: 12, Views: 198]    By: Unnamed
Hey. I have a carpc and I am looking to get a new LCD screen because my current one does not operate in -40C temperatures. I was hoping someone more technical than me might be able to answer some q...
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PhysicsForums Closed loop topology... preserving proper DC bias  
21:23 26-Jul-07   [Replies: 0, Views: 90]    By: Unnamed
Could some one clarify what is meant by the following statement? Unique models accurately measure open-loop design properties without breaking a closed-loop topology, thus preserving proper DC bias...
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PhysicsForums majority carriers and minority carriers coexist, how?  
19:54 26-Jul-07   [Replies: 0, Views: 79]    By: Unnamed
I actually forgot the concept how do both the majority carriers and minority carriers coexist in n-type material or p-type material, and doin't recombine with each other. I can slightly remember th...
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PhysicsForums Fourier transform of a modified impulse train  
15:57 26-Jul-07   [Replies: 2, Views: 117]    By: Unnamed
I need to find the Fourier Transform (FT) of: LaTeX Source CodeThe following code was used to generate this LaTeX image:[tex]x(t)=\\sum^{\\infty}_{n=-\\infty}((-1)^{n}\\delta(t-nT))[/tex]LaTeX code...
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PhysicsForums Ideas for an Independent Research Project in Signals  
13:29 26-Jul-07   [Replies: 6, Views: 169]    By: Unnamed
I'm looking ahead to winter quarter 2008 when I will be starting an independent research project. I wanted to get an early start in thinking about what I might be able to do. I am thinking that I wa...
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PhysicsForums microprocessor Subject  
10:19 26-Jul-07   [Replies: 0, Views: 77]    By: Unnamed
Hi guys, Im a student of electrical engineering. Current in my first year. I need help from my fellow engineering student to answer some of the question i posted below. The feedback from you would ...
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PhysicsForums I'm terrible with power issues  
21:17 25-Jul-07   [Replies: 2, Views: 108]    By: Unnamed
Sorry for wordiness, the power problem is probably simple... Im a CSE student working on a team trying to create an IBM 704 emulator. It's a big headache, but all that aside, one of our components...
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PhysicsForums Solenoid Electromagnet with strong core, low residual magnetism  
15:09 25-Jul-07   [Replies: 11, Views: 232]    By: Unnamed
Hello, this is my first post here. I'm building an electromagnet as part of a larger experiment in my lab. My magnet needs to move a magnetic thread made with a paramagnetic substance. This string ...
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PhysicsForums Mixer (Modulator, Frequency Multiplier...whatever)  
03:49 25-Jul-07   [Replies: 1, Views: 95]    By: Unnamed
Hi guys I am now building a simple synchronous detection circuit, I have now two signal generators, one generate a 20 MHz sinusoidal signal, and the other one gives a 19.99 MHz signal. If now I wan...
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PhysicsForums hobby uC's  
03:36 25-Jul-07   [Replies: 4, Views: 154]    By: Unnamed
so, I've been looking into some uC projects as an extra hobby. no specific ideas yet besides a generic lil autonomous robot. but i am having dificulty deciding on what type of uC to use, and thats why...
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PhysicsForums What exactly does an amp do?  
03:20 25-Jul-07   [Replies: 6, Views: 219]    By: Unnamed
I know that in car audio systems amps are used to increase power to the speakers especially the subwoofers but how exactly does it do that? If an amp is 1000 watts and watts is volts times amps than w...
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PhysicsForums stability criterions  
03:17 25-Jul-07   [Replies: 1, Views: 80]    By: Unnamed
hi, can anyone please help me with understanding the criteria for stability of a transfer function? especially with the bode plot, root locus, and nyquist. i've gone through a few search results...
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PhysicsForums tesla coil  
22:19 24-Jul-07   [Replies: 6, Views: 218]    By: Unnamed
any of you every attempt to design and build a tesla coil. I would love to build one . Can any of you share your experiences when you first begin to construct the Tesla coil and how long did the pro...
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PhysicsForums Ammeter  
21:35 24-Jul-07   [Replies: 5, Views: 137]    By: Unnamed
Hi i recently acquired an ammeter with a shunt can anyone explain how to wire this so i can measure amps in an electrolytic cell. Does the positive lead have to be wired across the shunt so that it do...
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PhysicsForums data sheet question  
14:40 24-Jul-07   [Replies: 4, Views: 82]    By: Unnamed
Take a look at this data sheet here [http://www.datasheetcatalog.com/datasheets_pdf/T/P/S/6/TPS61032.shtml]> and tell me this: There are multiple pins assigned for the same function. there are two pi...
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PhysicsForums connecting D/A converter  
06:58 24-Jul-07   [Replies: 15, Views: 296]    By: Unnamed
Hello, I want to connect a d/a converter [e.g, MAX515] to RS232. I need a 0-5v output. assuming that I know how to write a code to output binaric signal, how do I connect the converter? I d...
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PhysicsForums Highly Efficient Piezoelectric Ceramics  
20:49 22-Jul-07   [Replies: 3, Views: 79]    By: Unnamed
does anyone work with piezoelectric ceramics or polymers i need to know so real world numbers that i just cant seem to find i think this is due to the fact that i have no real clue as to what i a...
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PhysicsForums Fourier Transform of a Modified Impulse Train  
16:36 20-Jul-07   [Replies: 4, Views: 169]    By: Unnamed
I hope this is OK to post here. I thought it would be better here than in the math questions forum, since you are EEs, and probably have more experience dealing with things related to the delta funct...
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PhysicsForums A study for autocorrelation function  
15:55 20-Jul-07   [Replies: 0, Views: 55]    By: Unnamed
I would like to know how to find the autocorrelation function. If there are any links for free e-books that can I downloaded to study the autocorrelation function in details. Thanks!...
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