Hello all,
This is my first post and this seems like an awesome community.
As my first post for the forums, I would like to know the following:
In my classes I learned the Laplace and Fourier...
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One electromotor serviceman who worked in a small workshop needed an ac power supply with 100HZ frequency.
He knew that in synchronous generator, if the magnetic flux of the field system is distribu...
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Hi, I'm designing an amplifier and need help with some basic ideas (Filtering is already taken care of). My main question is bolded.
The output is an audio signal, and it drives an 8 ohm speaker. ...
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In an extra high voltage substation, the output overhead lines protected by standard protection system.
That protection system contains high quality main and backup distance protection, sync/auto re...
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Hi there,
See attached for original circuit.
Basically I need to find thevenins equivalent of the network.
My attempt:-
To find the resistor equivalent
First of all I replaced all voltage sou...
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Please view the attached circuit. I will be appreciated for any suggested answer, thanks!
Q1) Calculate the dc input resistance of the transistor amplifier shown in figure 1 below if the current ga...
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Good day to all!
I just want to ask if someone here knows some data or measurement of speaker diaphragm movement(distance moved by the diaphragm relative to its resting position) of any speaker(any...
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Gents, Ladies,
I have a design where I have:
AC -> RCD -> UPS (dual conversion apparently) -> PowerStrip -> Equipment
If I induce an earth leakage fault downstream of the UPS (i.e...
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Hey,
I'm currently in an intro to EE course, and our textbook is horrendous (Hambley's Electrical Engineering Principles and Applications). Does anyone have a suggestion on a better alternative that...
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Hey guys
If the output of the function generator for a sinusoidal waveform is 6 voltage divisons peak to peak along the voltage axis- and the voltmeter reads 2.12v, find the volts/div scale that is...
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Will the impedance characteristics for a length of stranded conductor be really close to an equivalent length of single core conductor?
For example, can you expect the same impedance from a 20 ft. ...
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Hey,
Theres something I'm curious about. If you consider a voltage source connected to an RL load , in order to compensate for the lagging power factor produced by the inductor in the load all the ...
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Can anyone tell me what the following circuit connection means? It's the arrow going from VEE to the 50k resistor. Thanks.
http://img442.imageshack.us/img442/8861/picture1ry3.png [http://img442.im...
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Hi,
Does anyone knows how to derive the silicon capacitance at flat band condition
in terms of the Debye length?
Regards...
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I have built a number of Marx generators ranging for 30KV to 4MV I have achieved good rise time but I was wondering if anyone else here had experience with them and could help me with decreasing the d...
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Hi Everybody, i'm doing a small project for my studies, i'm developing the xPC Target toolbox of Matlab.
well the point is that i need to do a temperature control, i'm using a thermistor as temper...
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Hello Guys,
I really need some help with this one. I'm still working on the circuit design for this AD9959 programmable pulse generator and I found (from reading the datasheet) that the output from...
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In this picture, as well as countless others:
http://en.wikipedia.org/wiki/Image:N...8Active%29.svg [http://en.wikipedia.org/wiki/Image:NPN_BJT_Basic_Operation_%28Active%29.svg]>
we have electro...
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I have a 555 out put connected to a coil and i get the frequency i need.
But now i need the 555 to power more coils. How should i connect the coils to keep the same frequency. In parallel or Series?
...
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for example, converting from base 10 to 2, a systematic way is to divide the number by 2's successively and keep track of the remainder. the remainder coefficients represent the binary number. Now why...
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So, I find myself without the AC adapter for my laptop and I need power.
My adapter is rated 19.5v 4.7a.
I have an adapter from an older machine (same manufacturer), rated 19.5v 3a.
The phy...
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We have a periodic signal of period 10 ms and amplitude 2.The signal is a rectangular pulse from -5/2 to 5/2 and 0 from 5/2 to 19/2.This signals fundamental frequency(f0) is 100Hz.It is passed through...
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Are there any decent dip package mixer ic's? It's very difficult to find them. A simple mixer ic to mix 2 signals is all I need. I have seen 20 pin and 32+ pins. Anything out there that is simpler for...
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Is anyone know how to do this question
Using algebraic manipulation to find the minimum sum of products expression for the function
q.JPG [http://www.physicsforums.com/attachment.php?attachmen...
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Hello All,
I'm now looking for yet another component for my experiments. I was doing some research into DC boost converters to figure out how to build my own (they seem pretty simple to make). I wa...
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