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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
21 5,710
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
21 4,503
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
63 75,576
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
193 83,973
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
27 54,780
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Mar26-08 12:32 PM
0 29,514
I am trying to understand when exactly the voltage is reflected from secondary back to the primary. 1. The...
Sep17-11 05:57 AM
3 3,642
1. When the CCFL tube lights up does it become a short circuit? 2. Are all CCFL inverters short circuit current...
Sep16-11 10:20 PM
6 2,345
I modified an astable multivibrator to send an alternating current across a load (square wave centered at 0V), given a...
Sep16-11 09:07 PM
3 2,052
which one is preferred 3-phase or single phase? in scott connection we convert 3 phase to phase is it possible to...
Sep16-11 08:57 PM
12 2,250
Hello. First off, I am not an electrical engineer, have no college education, just an inventive mind, and smart enough...
Sep16-11 05:25 PM
0 755
If a circuit is oscillated at one frequency what basic components (resistors, capacitors, inductors) or configurations...
Sep16-11 04:44 PM
4 802
Hi, if i add to different voltage source in parallel what will happen. I know that KVL forbid that and in pspice it...
Sep16-11 01:35 PM
Karim Shahbaz
9 12,614
Hello, I have a waveform that have noise when my pump stroke hit some mechanical part. i have converted...
Sep16-11 01:57 AM
0 607
I am trying to use a 0-5000 lb load cell with an Arduino. My issue is the 10 bit input on the Arduino. The load cell...
Sep15-11 02:08 PM
10 2,790
Hi! I would like to have a suggestion from this community about books that i could buy to design a battery managment...
Sep15-11 05:14 AM
0 1,344
I have been out for 6 years, I am looking for op-amp manufacturers. In my days, we had Analog Devices, Maxim, Linear...
Sep14-11 11:58 PM
0 1,587
Introduction: WolframAlpha is a freely available computational engine that can supplement already existing software...
Sep14-11 11:09 PM
9 39,445
I have been trying to learn electronics (I am familiar with the principles, just have no experience designing complex...
Sep14-11 07:11 PM
5 4,858
Okay, so before when I asked a question about voltage multiplication, I was recommended a charge pump. But now I...
Sep14-11 07:05 PM
7 1,274
Heya Everyone Ok so my question may seem a little silly but nevertheless I will ask. I need to know what you...
Sep14-11 05:00 PM
9 2,893
Hello everyone. I have a electrostatic question....
Sep14-11 11:13 AM
0 683
Hi Gents, new guy here. I'm an ME by degree ( 25 years ago.) but it's been a while since I've done any real number...
Sep14-11 10:27 AM
jim hardy
11 4,185
I don't understand why always we use open loop transfer function G(s)H(s) to draw the root locus. can somebody please...
Sep14-11 09:12 AM
1 2,125
When an inductor is oscillated at it's resonant frequency it becomes a parallel LC circuit (Tank circuit). At this...
Sep14-11 06:58 AM
3 1,138
Hi, I understand what phase and time-delay are, but can they be converted from one to the other? For example is...
Sep14-11 04:45 AM
3 3,331
Can we calculate the daily energy generation of 20KW power pack if have the following information: ...
Sep14-11 03:44 AM
6 3,101
Anyone can suggest me on how to choose driver/ micro controller for DC Motor? I need to have 4 axis motor controller...
Sep14-11 03:42 AM
0 728
I have an inquiry: I work with quite a few physicists, some with Bachelors, some with Masters, and numerous with...
Sep14-11 01:10 AM
17 4,857
I know that the time constant for RL ckt is L/R and RC is R*C. But I'm a curious as to what the time constant for a...
Sep13-11 10:46 PM
0 6,932
Hello, I'm trying to design a capacitor charging circuit using a Cockroft-walton voltage doubler circuit. My mains...
Sep13-11 10:43 PM
0 869
for one section of my project, i need to know the phase difference between two signal. they are both 40MHz, but out...
Sep13-11 09:17 PM
0 3,002
Hello, I am trying to get my head around biasing. I do understand the principles. In the attached circuit the...
Sep13-11 08:59 PM
1 849
Hi, Was wondering how dual input power strips work. Ive seen them in data center racks, they have 2 mains power...
Sep13-11 08:39 PM
1 1,318
Hello geeks of PF! Wooooo! I am in need of some help that will allow me to build a device. Roughly this is how I...
Sep13-11 08:36 PM
6 1,870
Hello to all I am an electrical engineer and in an interview I was asked to tell the MVA rating of a transformer...
Sep13-11 06:09 PM
11 3,106
With a CV curve of a heterojunction, say from -3V to 3V, is it possible to extract the valence/conduction band offset...
Sep13-11 01:30 PM
0 869
Hi Everyone, Okay so I am doing Computer Sciences and Engineering , and I have to take an Electronics class, where...
Sep13-11 08:58 AM
1 1,708
Hello. I use an OpAmp LM324 as follower behind a voltage divider connected to a high voltage in the 8 kV. That works,...
Sep13-11 01:42 AM
8 1,687
All the books I have read say that when a proportional derivative controller is used the natural frequency remains the...
Sep12-11 07:08 PM
jim hardy
1 2,069
Hello, I want to use a DC permanent motor as a generator in order to use it to charge a battery. This generator will...
Sep12-11 07:05 PM
1 2,788
Hi guys I want to create a pillow shaped device which would be able to read the punching impact of a bare hand fist...
Sep12-11 04:30 PM
1 608
Hi, I just took up a course on biomedical engineering. And i have no background knowledge on engineering, having...
Sep12-11 02:57 PM
3 2,329
I was carrying out a insulation resistance test on a ring main circuit at the dist board in an industrial workshop....
Sep12-11 02:28 PM
jim hardy
1 936
If I have a transfer function, and I need the frequency response of it, how do I go about doing it? Is there a...
Sep12-11 12:42 PM
9 15,709
i am confused about the railguns electro-magnetic action please somebody explain if possible.
Sep12-11 11:24 AM
1 715

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