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WolframAlpha guide on electrical engineering 
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#1
May2109, 03:45 PM

P: 1,636

Introduction:
WolframAlpha is a freely available computational engine that can supplement already existing software such as mathematica, maple, mathlab, or excel. The purpose of this miniguide is to go over some of its functionality with emphasis on electrical engineering. www.wolframalpha.com Dimensional analysis: WolframAlpha recognizes many common units. It will simplify dimensions and scale units. For example,
WolframAlpha also can tap its database to pull up a conversion formula from the context
or to find inductance to resonate with 10 nF capacitor at 100 Khz; just say that
Also if you haven't memorized resistor color bands already, you can still look them up
Complex numbers and phasors: Working in polar form is supported in WA. By typing an impedance in rectangular form
and likewise, we can indicate a phasor in polar form with an exponential e
we can also manipulate phasors algebraically
indicate degrees with “deg” otherwise WA will interpret it in radians. Solving equations: To solve [itex] x^2  2x + 1= 0[/itex], enter the equation as it is
and WA solves it. Don't even have to specify the variable to be solved. Solving systems of equations is just as easy, [tex] v_1 + v_2 + v_3 = 4 [/tex] [tex] v_1  v_2 = 10 [/tex] [tex] v_1  3v_2 + 5v_3 = 8 [/tex] simply type
just make sure that the equations are separated by a comma. Differential equations are supported as well. An nth number of apostrophes indicates an nth derivative, and proceed as before. For example to solve [tex] \frac{d^2y}{dx^2}  \frac{dy}{dx}  2y = 0 \indent y(0) = 1, y'(0) = 2 [/tex] enter the code as follows,
We can also maximize and minimize
Logic gates and boolean algebra: Converts number bases,
We can also work with boolean expression in WolramAlpha, for example
a schematic with logic gates, and even simplifies the expression to a minimal form Here is the supported syntax:
More on calculus: WA can perform basic calculus take derivatives: [tex] \frac{d}{dt} cos(t) [/tex]
[tex] \int \frac{1}{x+1} dx [/tex]
[tex] \mathcal{L}(x^2), \mathcal{F}(e^x) [/tex]
Plotting: If you want to graph a transfer function for instance, [tex] H(s) = \frac{s+10}{s^2 + 4s + 8} [/tex] enter:
Conclusion: WolframAlpha uniquely combines different tools into a one freely available package and that expands our tool box. This miniguide doesn't cover all of WA, it merely touches upon features that can be used in electrical engineering, for more information visit their examples page http://www28.wolframalpha.com/examples/ also, WA is said to expand in the future, enabling more functionality, and tools. 


#2
May2109, 03:57 PM

Mentor
P: 41,353

Thanks for putting that together, waht. I've stickied this thread to help us learn how to utilize WA.
Any further posts in this thread should be about tips on how to use WA and its features. Discussions about WA and its implications for eductaion, etc., belong in a different thread, like this one: http://www.physicsforums.com/showthread.php?t=307686 . 


#3
May2109, 08:46 PM

Mentor
P: 12,074

The inverse operation works also. Type this for input:
View the full WA output here: http://www5f.wolframalpha.com/input/...e&equal=Submit . . 


#4
Oct1409, 06:37 PM

Mentor
P: 12,074

WolframAlpha guide on electrical engineering
WolframAlpha calculates parallel resistor combinations:
http://www.wolframalpha.com/input/?i...0+%2B+1%2F4700 


#5
Apr410, 09:06 PM

P: 17

WHOA!
http://www.wolframalpha.com/input/?i=low+pass+filter designs filters for you http://www.wolframalpha.com/input/?i=op+amp also, a simpler calculator for the parallel resistances, http://www.wolframalpha.com/input/?i...lel.R2_20+ohms also, very nice inductance calculations for the RF geeks: http://www.wolframalpha.com/input/?i=inductance+of+coil 


#6
Apr1010, 07:02 PM

PF Gold
P: 1,684

Check out the WolframAlpha app for the iPhone and iPod Touch. Its pretty awesome!



#7
Jul1310, 10:39 PM

P: 17

Remember when the WA app cost $50? They thought because it's better than any scientific calculator could be, they could charge that much, but you know, no one would pay that much so they made it $2.



#8
Dec2010, 02:31 AM

P: 3

is there any advantage over the ipod app vs the standard web version?



#9
Jun1711, 02:48 PM

P: 4

Would you guys recommend wolfram alpha to a student who is interested in learning more about physics and modeling physics within computing systems? I have a small bit of experience with mathlab, and am hoping to be on the go as I do this (iPad, Android, etc.)



#10
Sep1411, 11:09 PM

P: 219

I have "Algeo.apk" in my galaxy tab, it is a wonderful application in small scale.



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