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Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Mar26-08 12:32 PM
berkeman
0 25,959
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 47,047
I've occasionally been asked by some of the students I've mentored or TA'd over the years, "What's in your toolbox? ...
Feb4-14 04:57 PM
davenn
62 59,406
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...
Apr10-14 04:04 AM
mwvivi
189 60,726
go to http://www.meridianelectronics.ca/circ/batmon12.htm. the 10k resistor is connected to the 56k resistor and...
Jan19-04 05:24 AM
wimms
1 1,482
I just finished a Physics course in Electricity and Magnetism and never worked so hard for a 'B' in a class. I'd...
Jan19-04 12:34 PM
psengupta
3 2,248
I have this box and I need to cut a rectangular opening to expose my led display. My question is there a tool to make...
Jan20-04 06:03 AM
Integral
1 1,326
If you have a radio and it is tuned to a specific freq, is it possible to find out what that freq is without touching...
Jan20-04 11:12 AM
russ_watters
1 1,102
Hi. I am building a power suply for a GM-tube tha needs a suply voltage of 550V. I am using a Cockroft-Walton voltage...
Jan20-04 10:32 PM
Buran
1 1,462
Ok I have this question that Im finding hard to answer. I understand that you guys won't answer homework questions but...
Jan22-04 12:41 PM
mmwave
1 983
what is a good technique for printing the words like "meter" on to a project box?
Jan23-04 11:37 PM
Integral
1 1,414
Do anyone know why the group velocity of microwaves inside a rectangular waveguide goes up when frequency goes up? ...
Jan24-04 11:18 PM
jdoane
2 2,510
what do I need to make a volume control using a momentary switch? I'd to to mount this switch near the steering wheel...
Jan27-04 02:19 PM
david90
0 3,491
Hello. Please, take a read to www.geocities.com/k_pullo/PM3.htm It's an study based on the Butch Lafonte's...
Jan28-04 04:20 PM
pallidin
71 18,619
If anyone is an expert on Velocity Modulation of Electrons within Electric Field, please try to help me. The...
Jan28-04 04:37 PM
pallidin
3 4,463
go to http://www.impconcepts.com/airfuelmeterforsale.htm and scroll down to the printed circuit board picture. How...
Jan28-04 05:20 PM
dlgoff
18 2,162
http://news.bbc.co.uk/2/hi/science/nature/3441643.stm what do you all think about the potential for a useful...
Jan29-04 02:17 PM
mark1
0 1,680
I'm really interested in electrical engineering. Mainly understanding of circuitry and building my own devices. ...
Jan29-04 03:35 PM
russ_watters
1 1,590
Is it possible to make very small, low power, but high frequency electromagnets and stack them up or inside each other...
Jan29-04 05:15 PM
Ivan Seeking
1 2,886
Hi, im building a Rail Gun for a science fair, i am having trouble though. i do not know what kind of resistors i...
Jan30-04 12:09 PM
david90
29 12,620
I was wondering if there was any way to predict the maximum distance an arc can form by its voltage (assuming standard...
Feb1-04 08:32 PM
binaryblade
0 3,522
i'm having trouble with a circuit i got for class and was looking for some help... hopefully this is the right place....
Feb1-04 11:04 PM
IKu
2 1,144
I designed an optical A/D (on paper only) several years ago. I have no means to make one since small scale...
Feb5-04 02:30 PM
dlgoff
37 3,319
how do you cascade MUX's??
Feb9-04 02:27 AM
Guybrush Threepwood
3 4,407
Been stuck on a problem for a while...any help would be much appreciated. A 100V dc motor is supplied from a...
Feb9-04 07:41 PM
louie
0 4,326
This has been racking my brain for the last week.. its about current..i keep trying to think of a circuit as a water...
Feb10-04 03:16 AM
Jimmy
5 2,313
I need help find a good page which talks about the physics of a tranformer. I know all about the b fields and the flux...
Feb13-04 08:25 PM
mmwave
1 1,233
I know that an electro magnet can have a higher tesla rating when you increase the current or the times revolved...
Feb15-04 04:02 AM
wimms
1 7,202
If I have a 0-1 volt voltmeter (10 led bargraph display) and I want to measure a 12 volt bat, would it be safe to...
Feb15-04 09:00 AM
Mr. Robin Parsons
7 1,353
Hey there I've been wondering just how efficient radiosignals are... If I were to place a transmitter broadcasting...
Feb17-04 06:18 AM
Nice coder
7 1,779
I have looking for something relating Hookes law to Fm=NI. The only thing I can come up with is N is the same as K and...
Feb17-04 07:24 AM
Smcgrath
0 2,220
I have read that that 'spot size' for reading a track on a CD is twice the wavelength, e.g. on a CD the track...
Feb17-04 11:19 AM
Loren Booda
3 10,485
Is there a systematic ways of expressing a boolean equation such as "ab+a'c" using multiplexer? Eyeballing and trial...
Feb17-04 04:19 PM
Hurkyl
3 10,011
awesome.....
Feb19-04 02:35 PM
Danae Legrow
0 962
hey guys im stumped on this project: make a 2 floor elevator. i am going to use an H-bridge to control which way the...
Feb20-04 01:48 PM
Cliff_J
3 2,906
Are there any materials that contract when a small electrical current is applied to it? What would be the necessary...
Feb21-04 09:57 AM
dlgoff
9 6,844
Hello. Here is a circuit layout based on the ideas of Edwin Gray and Stefan Hartmann. We all know that when a...
Feb21-04 12:02 PM
wimms
24 4,403
Over the years I have run across a few surprising facts about electrical components. I thought to pass on a couple of...
Feb22-04 08:21 PM
Ivan Seeking
4 3,500
My car has a knob on the radio to control the volume. How would I make another volume control sp that I could put by...
Feb22-04 11:29 PM
Cliff_J
13 1,706
i hate science fair projects.... i need information. i am doing a project on Complete circuits and it is a cheap...
Feb23-04 07:09 PM
Danae Legrow
10 5,519
Say I have 3 modules and I want them to connect them together (make them work together. Ie, output of one module would...
Feb25-04 01:48 AM
Guybrush Threepwood
9 4,804
I was wondering if anyone could help me with the simulation of the startup sequence of an induction motor, using DQ...
Feb28-04 05:54 PM
louie
0 5,882
Hi there... I'm interested in the application of EM fields to alter properties of fluids. Has anyone got any...
Mar1-04 01:21 AM
NateTG
2 1,160
http://science.howstuffworks.com/camera-flash2.htm check out the schematics for a basic flash of a disposable...
Mar1-04 09:50 AM
Cliff_J
2 5,042

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