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Jan16-12 Greg Bernhardt
Even as a kid, I saw beauty in old devices. That made me want to understand how they worked. I had lots of old...
Y 12:14 AM
dlgoff
21 3,916
Hello, I haven't learned anything about micro controllers yet but I wanted to get a head start since I hear that...
Y 08:30 AM
Windadct
21 5,121
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Mar26-08 12:32 PM
berkeman
0 29,178
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 81,748
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 54,113
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 73,887
The formulas in question are: Beta = Ic/Ib Ie = Ib ( 1 + beta ) Ie = Ib + Ic
Jul15-12 03:22 AM
Femme_physics
5 3,236
Does quickly shorting out an inductor in series with a capcitor create a small emp?
Sep15-05 03:47 PM
berkeman
7 2,063
I had 2 people telling me 2 different things...so I don't know the real answer. Does resistance go up or down with an...
Feb11-11 12:32 PM
Femme_physics
6 5,852
If I hava non periodic waveform and I divide it into 3 cycles is taking the RMS of each cycle and averaging the same...
Oct27-11 09:08 PM
yungman
3 952
Does it, or is that current? (sorta yes or no answer I guess)
Apr26-11 08:03 PM
KingNothing
5 7,835
Synchronous generator synchronous reactance Xs is composed of Xs = Xa + Xl where Xl is the armature leakage ractance...
Jan18-12 06:20 PM
jim hardy
5 2,096
The other day, I was sitting down watching TV, then I turned the TV off, and the DTV, and I noticed a sort of ringing...
Aug29-09 12:50 PM
famousken
11 1,955
I'm learning AC and theory says that the polarity of AC inverses.. even the name says 'alternating current'.. now what...
May18-14 11:33 AM
MrSparkle
8 332
Hi, What if the inductor coil is wound one way rather than the other. Then the circular flow of current will be...
Jul31-11 11:30 AM
Bassalisk
1 2,739
In this schematic there is two potential transformers on the left and two current transformers on the right. The...
Jan21-10 10:28 AM
dlgoff
1 1,337
Greetings engineers, The question is mentioned in the title. I actually thought of making it as my final year...
Aug10-11 04:16 AM
ali.cmi
8 3,384
Hello I want to a device to change 50Hz to 60Hz, and found the inverter can do it. but the output wave is not sine...
May14-12 05:57 PM
sophiecentaur
9 985
While reading Laplace transform in my book, I came across a problem. where it evaluates the laplace transform of ...
Mar26-13 12:33 PM
rudra
5 806
If you want to soldier something, then, how can you check to be that whatever you are soldering has no lead present?
Nov22-09 04:15 AM
Born2bwire
6 3,826
I found most literatures on Electrical or Magnetic fluxes maddeningly unclear about the MATERIAL in which the...
Jun6-14 06:19 PM
ugenetic
4 226
Im trying to build an IR receiver circuit that will perform a simple on-off operation when I push a button on an IR...
Dec18-08 11:47 AM
berkeman
1 1,430
Hello: I need help determining if I and V assignments follow the passive sign convention. Here is the image of the...
Sep12-07 08:27 PM
hadia
13 6,036
More than likely somebody has already done this, however I do not know what to search for or where to start. Hopefully...
Jun19-08 09:06 AM
IHateMayonnaise
10 1,754
I found an image on google that I recognised to be an almost functioning NOT gate: ...
Feb6-13 11:27 AM
DrZoidberg
11 993
I ran across this link on how to revive NiCad batteries. Before I try this, I want to run this by you guys. ...
Jan21-11 06:53 PM
vk6kro
1 761
I've found this starter kit on Amazon...
May20-14 11:46 PM
MrSparkle
6 326
Hi, I have seen a couple of videos on youtube where people simply hook a homemade simple coil of copper wire ...
Aug13-12 11:41 AM
jim hardy
30 2,407
I was wondering if you were to use the em field caused by electricity flowing through a wire or coil to push a...
Dec3-13 05:22 PM
sophiecentaur
5 612
In a recent discussion the output of a single-phase permanent magnet alternator was the topic. The alternator has a...
May29-11 02:52 PM
DragonPetter
16 2,782
Hi guys (and gals) Say, i have a solar panel rated at 100w 12v with the following specs: Short circult...
Aug15-12 03:37 AM
NascentOxygen
1 518
I've been hearing that our very brains have more computing power than the highest of computers. IS this true. I mean...
Feb1-09 11:33 AM
XPTPCREWX
44 5,350
Hi guys: I've read on a few websites that zero padding does not alter the frequency resoltion? But the frequcny...
Jan5-07 09:15 AM
LM741
0 3,615
if not, what resistance is the closest to 175kohm? tqvm.
Mar6-06 09:37 AM
berkeman
3 1,123
Hello. First time poster, many-a-year browser. I will describe my current project in the fullest detail I can and...
Oct2-11 07:44 PM
OmCheeto
21 3,251
I have bought just four mains voltage LED lamps, in my life. Three of them have failed. One has failed after only a...
Nov27-12 03:46 PM
sophiecentaur
21 1,636
I keep looking at adverts for LEDs in the home. None of the LED lamps I have seen in the shops look 'right'. They look...
Jan13-10 06:17 AM
Snoogans
1 807
I was told that a shaver socket has an inbuilt isolating transformer to prevent electric shock. But surely if someone...
Apr16-08 09:45 PM
stewartcs
5 3,616
So I'm a physics major who is doing a summer research internship that is mostly electrical engineering. My research...
Jun30-08 04:22 PM
chroot
4 1,183
Are the electrons in the donor and recipient energy bands in doped material involved in conduction of electricity, and...
Dec28-11 11:56 AM
es1
6 1,382
I think this belongs here because its about magnets, except for the adhesive part which may be materials. Im...
Oct14-10 10:50 AM
MagnetDave
1 1,199
Are there any other atomic elements that are capable for doping apart from the trivalent and pentavalent atoms? If any...
Dec31-11 05:12 AM
Kholdstare
6 1,519
Hello, I have a doubt regarding dot convention in magnetically coupled circuits. In book A, the following is...
Jul9-10 04:52 PM
degs2k4
6 9,962
hi really it is apleasure to participate in acommunity like that i have aquestion ... wat is aring modulator and...
Oct21-09 06:50 PM
berkeman
1 739
Yo yo yo. What up homies? I am once again humbled to be in need of your gracious assistance. I did all the work this...
Apr14-10 12:43 PM
íMR.AWESOME!
8 2,699
Hello. I have to replace a component at the input of an old oscilloscope. The reference is unfoundable ( 41R105 ??? )...
Dec4-12 11:33 PM
Ravaner
5 779

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