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Jan16-12 Greg Bernhardt
Hello, I haven't learned anything about micro controllers yet but I wanted to get a head start since I hear that...
Jul21-14 08:30 AM
Windadct
21 7,142
Even as a kid, I saw beauty in old devices. That made me want to understand how they worked. I had lots of old...
Jul21-14 12:14 AM
dlgoff
21 6,029
I've occasionally been asked by some of the students I've mentored or TA'd over the years, "What's in your toolbox? ...
Jul13-14 10:34 PM
NATURE.M
63 79,480
ansoft, maxwell Sticky Thread Pinned: Maxwell 3D (ANSOFT) ( 1 2 3 ... Last)
Dear all, I'm a new user and I like to exchange information about the use of this tool. From my point of view tool...
Jul5-14 05:32 AM
hussain_aamir
193 89,946
I came across another good search engine today looking for a datasheet, so I thought I'd try starting this thread for...
Dec3-13 12:53 AM
doubtbook
27 56,641
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Mar26-08 12:32 PM
berkeman
0 30,350
Hey guys I'm dissecting this pencil sharpener to see how it works. I understand every component except one. The...
Mar21-09 08:06 AM
Redbelly98
2 1,173
Hi Guys, I have the following circuit I want to analyze: http://i39.tinypic.com/29v0war.jpg I do not understand...
Mar20-09 10:08 PM
Bob S
5 1,922
Hello, I want to connect 2 current amplifiers the same time and I want to be able to switch between them. How...
Mar20-09 09:50 PM
Bob S
1 853
Hello, I'm working on a design idea and have run into a problem. Despite multiple google searches from different...
Mar20-09 03:59 PM
BrianConlee
10 1,794
Hi Can someone help me on how i can calculate the input common mode range for this pmos diff pair. I'd have an idea...
Mar20-09 12:00 PM
BillyBobjoe
3 4,876
I operate a CNC router table with a high speed spindle. I'm looking to upgrade to a new spindle but need to know if...
Mar19-09 05:32 PM
dlgoff
3 2,967
any of you every attempt to design and build a tesla coil. I would love to build one . Can any of you share your...
Mar19-09 05:23 PM
spaceball3000
8 6,279
how do i measure the current flow threw the neutral wire if phase R is open circuited? the impedance per load is 3+7j
Mar19-09 12:38 PM
Carl Pugh
1 1,120
Hello, I am in need of a schematic for a circuit that acts as a stopwatch which counts and displays seconds and...
Mar19-09 04:39 AM
MATLABdude
1 4,309
I want a matlab code to draw the root locus for a characteristic equation of a transfer function of unity feedback,...
Mar19-09 04:19 AM
MATLABdude
1 1,844
I thought it would be a good idea to write this down, all in one place, finally. Any errors, or impovements needed?...
Mar19-09 04:16 AM
Phrak
10 8,000
I am looking for a circuit that takes a voltage to preselect a power and than outputs that power through a variable...
Mar19-09 02:24 AM
0xDEADBEEF
3 1,281
Hi all, Here is a picture of two circuits. The one at the left is stimulated with a current source and the other...
Mar18-09 10:25 PM
Corneo
3 1,949
I want to know where can you find thermocouples in a store to buy or can you make them by using house hold items? The...
Mar18-09 06:21 PM
spaceball3000
7 2,895
Hello this is my first posting. I have a device that I acquired from my old high school. It is a demonstration unit of...
Mar17-09 09:15 PM
Bob S
3 5,100
I was just curious what would happen if a device working at for example, 5 V DC voltage, is given 10 V peak to peak AC...
Mar17-09 09:03 AM
raithrovers1
3 949
In a 480v Three Phase Induction Motor.....what kind of educated guess or assumption can be made as a cause, when two...
Mar16-09 10:33 PM
Averagesupernova
1 5,929
Can anyone point me to a long range distance sensor. I'm not sure what types they have out there other then...
Mar16-09 07:07 PM
mgb_phys
4 5,741
I'm considering using this power supply: http://salestores.com/pr30trouposu2.html now.. if i wanted to get a...
Mar16-09 11:53 AM
MATLABdude
9 2,404
I'm currently making a coil assembly for a customer. The coil has the following specs: 120 VAC application 1,600...
Mar16-09 11:01 AM
bmwdavid
7 1,065
Can anyone think of any type of failure mode in an electronic component that could account for the following weird...
Mar16-09 10:46 AM
uart
6 1,781
Hello, I tried to build inverter circuit by using following link. http://www.geocities.com/...
Mar16-09 10:31 AM
dht115
2 12,911
hi, I,ve recently wrote a m-file in matlab which generates a kind of long bitstream,sience it is a long stream i...
Mar16-09 08:24 AM
Predictor
2 831
This is a question about brushless DC motors. (I should have put that in the title) How do you compare the two for...
Mar16-09 02:30 AM
b.shahvir
3 1,312
okay for some strange reason i'm very very scared of bjts .. i dont know maybe i just dont get em at alll... is there...
Mar16-09 02:21 AM
frixis
8 1,259
Good day everybody:smile: I'm new participant here and i would like to know your ideas and opinions about the issue...
Mar15-09 11:13 PM
pantaz
7 1,449
Hello all. I am trying to build a very simple circuit and need some help. I want to have an LED connected to a...
Mar15-09 07:15 PM
Inspiron1
1 1,061
Best software for low voltage single line diagram design and calculation what is the best software out there for...
Mar15-09 04:23 PM
berkeman
2 5,582
Hi Guys, :smile: I have heard of many energy saving devices available commercially, which when connected in...
Mar15-09 01:32 PM
b.shahvir
23 3,372
I have to connect very thin wires d<40\mathrm{\mu m} of different metals multiple times to make a thermopile. Due to...
Mar15-09 07:10 AM
0xDEADBEEF
8 1,446
I just got a new home theater tuner with outputs that say 6Ω, but the speakers I have are 4Ω. Can these speakers be...
Mar14-09 05:49 PM
dyaballikl
4 2,151
Has anybody heard of this concept? http://www.sciencedaily.com/releases/2009/03/090311162807.htm Somebody seems...
Mar14-09 05:11 PM
Phrak
2 2,815
Hi I was using a 50 amp hour battery and running something which is using 2 Amps all the time.. How would I...
Mar14-09 04:51 PM
raithrovers1
2 2,555
1.What happen when we connect 3~ phase star connection 415volts pump to single phase 250 volts power supply?,it gets...
Mar14-09 04:39 PM
Bob S
2 973
Just want to confirm i have this correctly.. in the following image: ...
Mar14-09 12:11 PM
uart
1 10,578
i have a burning question which i need to be answered by any one competent here.... i want to know that.... why...
Mar13-09 12:16 PM
b.shahvir
5 1,316
I have designed a magnetic pulser using a camera flash and a copper wire air core inductor wired in series with the...
Mar13-09 11:45 AM
Bob S
1 974
So if you have something like this: http://www.amazon.com/Electro-Harmonix-US9DC-100-9V-Power-Supply/dp/B0002H07CW ...
Mar13-09 10:43 AM
Bob S
2 4,133
Hey everyone, Im currently reading Horowitz & Hill and am a little confused on the topic of the intrinsic emitter...
Mar13-09 10:19 AM
Bob S
5 10,239
Hi Guys, :smile: My query is a bit abstract in nature! But i will be very grateful if someone can provide me with...
Mar13-09 02:08 AM
b.shahvir
5 2,851

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