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PhysicsForums Power transformer with inferior core  
08:21 6-Aug-07   [Replies: 0, Views: 6]    By: Unnamed
A power transformer manufacturer which was located in economical boycotted country met some problems in material provision. The core material and some other things shall be supplied by a foreign comp...
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PhysicsForums Matlab digital low pass filter  
08:17 6-Aug-07   [Replies: 0, Views: 112]    By: Unnamed
Hi, I do not have the signal processing toolbox for matlab but I want to use a low pass filter on a set of data to remove noise. How do I do this? I've googled for hours but cannot find anything th...
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PhysicsForums Photelectric gel  
02:04 6-Aug-07   [Replies: 1, Views: 93]    By: Unnamed
I beliveve there could be a possiblity that on the south face of most buildings a bank of photoelectric gel could absorb, maintain, and store the required capacity to power most homes and busisness....
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PhysicsForums synchronous motor excitation  
11:44 5-Aug-07   [Replies: 2, Views: 100]    By: Unnamed
Im a electrical engineering student. I am now trying to understand the operation of synchronous motor. I need helps from electrical professionals out there about the excitation system of the mot...
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PhysicsForums Electrical energy transmission project in the year 2107  
10:23 5-Aug-07   [Replies: 1, Views: 32]    By: Unnamed
Let's imagine the year 2107.In that time electrical power will be generated in nuclear power plants and electrical energy will be produced in big nuclear reactors. Also the electrical energy will be t...
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PhysicsForums battery theory  
10:19 5-Aug-07   [Replies: 8, Views: 207]    By: Unnamed
In battery, after finishing of its construction and positive & negative electrode creation, why we will need an external electrical lead (for example copper wires) for transmission of energy betwe...
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PhysicsForums GPS timebase signal  
02:43 5-Aug-07   [Replies: 2, Views: 153]    By: Unnamed
GPS modules produce a very accurate 1 second timebase signal, rms differency of about 20nS. How do you suggest of using that to split it into a 1000 pieces = 1000Hz = 1000ms ? My idea is to make a ...
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PhysicsForums ULN2003A Driver  
02:43 5-Aug-07   [Replies: 2, Views: 114]    By: Unnamed
I recently purchased a few ULN2003A chips with the goal of eventually powering a stepper motor. So far I'm just testing out the chips, but I've run into a bit of a roadblock. I'm not quite sure how to...
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PhysicsForums Break Beam Sensor  
17:07 4-Aug-07   [Replies: 5, Views: 235]    By: Unnamed
hi yall! im doing a neuroscience research on the circadian behavior of different species of fishes, and i need a device to measure activity levels of fish under different light conditions. one of ...
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PhysicsForums Temperature effect on resistance of Electrical Connector Conductor  
04:39 4-Aug-07   [Replies: 10, Views: 432]    By: Unnamed
Hi I am currently working at a company for a work placement who make underwater mateable electrical connectors. The company recently have been asked to make a connector which can withstand high tem...
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PhysicsForums Powering 12v Air Pump with Audio?  
03:32 4-Aug-07   [Replies: 20, Views: 437]    By: Unnamed
Hi, I'm currently an art student at the University of Houston, and I've run into a bit of a roadblock. I'm working on an installation in which an audio signal from a headphone jack will be sent to ...
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PhysicsForums Phototransistor vs photodiode ?  
00:00 3-Aug-07   [Replies: 3, Views: 175]    By: Unnamed
HI all, i'm currently working with IR sensor diodes, and trying to find a proper device for my project, however i havent found a good unit which fills my needs. Now that i have extended my search ...
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PhysicsForums Wallace 8x8 Multiplier Need Help  
15:48 2-Aug-07   [Replies: 2, Views: 66]    By: Unnamed
I need to construct a schematic using and gates, full and half adders for the following : Multiply two 8-bit numbers using Wallace addition structure. Can anybody help me with it. I know that...
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PhysicsForums Another problem, voltage characteristic in a diode circuit  
09:39 2-Aug-07   [Replies: 3, Views: 94]    By: Unnamed
Good morning lovely people ! As I got some really helpful advice here yesterday i though i'd try it again, hopefully you haven't yet had too much from me (-: So my question is concerning the att...
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PhysicsForums understanding impedance  
09:15 2-Aug-07   [Replies: 9, Views: 177]    By: Unnamed
I know the formulas, to some extend what impedance is. But i guess i would like to know what it really means in real world and how to use it/match it or manipulate it. Please help correct my unders...
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PhysicsForums Multi-Symbol Differential Detection question  
05:40 2-Aug-07   [Replies: 0, Views: 69]    By: Unnamed
I'm learning MSDD. There is a statement that says differential encoding is required for MSDD to work. I can't wrap my head around this idea. Could anybody give me a hint? Thanks. To simplify things...
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PhysicsForums Soldering Wire??  
00:03 1-Aug-07   [Replies: 2, Views: 103]    By: Unnamed
What kind of material is used for making a soldering wire?? I mean, what should be the properties of the material?? Can anyone help me out for this??...
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PhysicsForums Real Power in AC circuit:cry:  
00:02 1-Aug-07   [Replies: 17, Views: 206]    By: Unnamed
hello all just studying to that crazy electrical engineering 2 exam coming up friday encountered something weird about power dissipation. Given is an AC circuit, source of 10V f=100Hz Z=20 Ohm M...
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PhysicsForums Design with D-Type Latch  
00:02 1-Aug-07   [Replies: 12, Views: 138]    By: Unnamed
How would I use an octal d-type transparent latch along with other logic to control 8 mics on a first-come-first-serve basis? There are 8 input mics and 1 output mic. Only 1 input mic can be used at...
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PhysicsForums electrical engineer, most introvert job?  
00:02 1-Aug-07   [Replies: 4, Views: 159]    By: Unnamed
Which job in electrical engineering would you guys think requires most time for yourself doing analyzes and calculations?(nerd work)...
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PhysicsForums Destructive Interference & Cellular Phones... Help!  
14:18 31-Jul-07   [Replies: 11, Views: 202]    By: Unnamed
Hi All, I have a question about the practicability of this theory; now I'm no physicist, so please bear with me. A company sells a chip which is said to "harmonize" the effects of the ...
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PhysicsForums Multiple Access interference  
13:09 31-Jul-07   [Replies: 5, Views: 90]    By: Unnamed
in order to evaluate the Multiple Access interfernce should I find the mean and variance for the transmitted Signal? Thanks alot!...
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PhysicsForums help  
09:04 31-Jul-07   [Replies: 3, Views: 113]    By: Unnamed
can anyone suggest a topic on semiconductor physics that is great for a thesis study? thanks...
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PhysicsForums EMI Shielding Gaskets  
07:58 31-Jul-07   [Replies: 6, Views: 158]    By: Unnamed
Hello everyone, Can anybody tell me that, actually what is the main function of EMI shielding gaskets?And i would also like to know the applications of EMI shielding gaskets. Best regards...
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PhysicsForums Synchronous Counters  
10:39 29-Jul-07   [Replies: 2, Views: 113]    By: Unnamed
Hi, First, I'll note that this is not a homework or project question - I'm studying for a test, and am trying to better understand the material. Note: I don't think that I'll need to know how to...
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