Recent content by eugenius

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    Engineering Need guidance on this circuit question using nodal analysis. Confused.

    Thanks, but I needed actual values for R L and C. Not an abstract expression. Anyway I will ask my professor tomorrow and post in my thread how to do it for other people having the same question.
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    Engineering Need guidance on this circuit question using nodal analysis. Confused.

    Hey, I used (v2-3)/2 because I chose current leaving the node is positive. So I move away from the node in the equation and don't need any minus signs at all. Just look at it. V2-3 you start at V2 (the node) and move towards 3 volts source. So you are kinda going in the direction of the...
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    Quick and easy transfer function question

    I have helped 3 people already, and yet nobody wants to help me. How nice. All I'm really asking is. How do I compare the 2 expressions below and solve for R L C. Don't even read the rest of my post if you don't want. Its a math question. http://img151.imageshack.us/img151/8585/jfdj.jpg
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    Converting numbers (binary and so on)

    Here is a website that does it for you. http://www.easysurf.cc/cnver17.htm#b10tob2 But only use that to check your answer. You need to do it yourself for credit probably anyway. Read here how to do it yourself. Its very easy...
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    Minimize the following functions using the K-map ?

    I think the little m stands for sum of products. Its usually written as \sum m (number, number, number) Product of sums would be written with a capital M. Do you know how to solve K maps like that? Its basically saying put a 1 in the squares that coorespond to the binary numbers 0,1,2,8,9...
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    Engineering Need guidance on this circuit question using nodal analysis. Confused.

    Okay I understand why you don't get it. I'm finishing up circuits 2 right now, and I had the same problems as you a year ago. But eventually I got it. It just takes practice. You don't need a 3rd equation! KCL simply says. The sum of all currents entering or leaving a node is zero. So if...
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    Engineering Need guidance on this circuit question using nodal analysis. Confused.

    Yep you got the superposition problem right. Voltage source causes 2 amps, but current source causes 1.5 amps in opposite direction. So current in 3 ohm resistor is 0.5 amps. Word of advice though. Don't use KVL for the voltage source. Its much easier to do this. When doing superposition the...
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    Quick and easy transfer function question

    That is the question. I wrote it up there. You have a circuit. Series combination of resistor, inductor, capacitor, and voltage source. All you know is that the output voltage is taken across the capacitor. You also know the transfer function of the circuit which I wrote up there...
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    Quick and easy transfer function question

    This question is more about math than anything, but it comes up in LRC frequency analysis so much that if anyone knows it, its you guys. I am trying to find the values of a resistor, capacitor and inductor. The only knowledge I have is that the three elements are connected in series and the...
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    Does MATLAB R2008a Include the Symbolic Math Toolbox for Circuit Analysis?

    Thank you, it seems my problem was that I have Windows 64 bit and symbolic toolbox doesn't work with 64 bit. I tried 32 bit and it works.
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    Does MATLAB R2008a Include the Symbolic Math Toolbox for Circuit Analysis?

    Hello, I have an assignment that requires the use of matlab. Basically I'm going to be solving circuits in the laplace domain. The professor wants us to learn MATLAB because apparently real engineers use it. I own MATLAB r2008a. I have no clue if it has the symbollic math toolbox or not, but...
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    How Do Capacitors Behave When Switched from Series to Parallel Configuration?

    Thank you, your explanations helped. I also found this. http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Capacitors/ParSeriesCap.html and this http://qbx6.ltu.edu/s_schneider/physlets/main/capacitor1.shtml
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    How Do Capacitors Behave When Switched from Series to Parallel Configuration?

    Thanks for the explanation. I guessed either what you said happens with equilibrium or what I said, but if what I said was true people would make use of it in a way similar to oscillator circuits, and since I never heard of such a thing it must be wrong. Now another question. Is it true that...
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    How Do Capacitors Behave When Switched from Series to Parallel Configuration?

    Ok so here is the situation. Let's say I have a circuit like this. http://img525.imageshack.us/img525/2883/excap1sp8.jpg The 10 microfarad cap is connected to the 3 volt battery in series. So its charged and has 3 volts. Then we flip the switch. The 10 microfarad is connected to the 20...
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    Transforming Trigonometric Functions using Laplace Transformations

    Hey Dick, I have the same question, laplace of cos(t). I did the integration by parts twice and got to the point where I need to take the limit. Now that's where I'm stuck. There is no limit of cosine and sine. They diverge to infinity. Rather they are bounded between 1 and -1. So what do I do...
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