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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Mar26-08 12:32 PM
berkeman
0 31,153
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...
Aug25-14 03:20 PM
Fuxue Jin
196 94,716
I came across another good search engine today looking for a datasheet, so I thought I'd try starting this thread for...
Aug22-14 02:05 PM
Jamesangelo
28 58,406
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 82,735
im looking for a circuit with this ability. so you have a signal input going into this circuit. and this circuit...
Jul26-13 03:31 AM
Baluncore
13 789
Have an APC Back-UPS XS 1500, Model BX1500LCD (same as BR1500LCD), computer battery backup unit. It came equipped with...
Jul28-13 10:13 AM
jim hardy
16 17,688
As a hobbyist, I was playing around with an MP3 player that uses a single alkaline AAA battery. I wanted to see if the...
Aug1-13 08:40 PM
steve stillman
5 3,603
greetings, Can anyone tell me when we should use Laplace transform and Fourier transform? It seems both of them...
Jul26-13 11:58 PM
Baluncore
3 596
I am posting this here with hopes that those of you will give me some industry experience! :) When it comes to...
Jul26-13 03:08 PM
Naty1
3 678
Dear Experts If I have 50 farads at 12 v, does this mean this power bank can discharge 600amps in 1 second based on...
Jul23-13 10:00 AM
ramonegumpert
2 633
Can I get that kw used for that hour from reading the meter in one hour? Thanks
Jul24-13 10:14 AM
Averagesupernova
13 917
I've seen this simple circuit design many times when the text is illustrating different points. Sometimes, again for...
Jul23-13 09:28 PM
jim hardy
7 629
Hi everybody, i was working on a layout of a boost converter control i finished it but now i am trying to...
Jul27-13 02:13 AM
Baluncore
1 661
Hi all! I am running an experiment in which I have rigged up a circuit to anodise aluminium foil. Running it with a...
Jul25-13 12:39 AM
NascentOxygen
3 718
If we assume we are using an H-Bridge to control the average voltage across a PMDC motor, is it still necessary that...
Jul27-13 01:29 AM
Baluncore
1 607
With large wind turbines which have AC generators why do they convert from AC to DC and then back to AC before...
Jul24-13 06:37 PM
jim hardy
2 541
I've several power adapters of cellphones/routers/modems etc lying around at home. I want to find out if they're any...
Jul25-13 12:07 AM
NascentOxygen
6 501
I have an obsolete, proprietary crystal oscillator. It is a 200MHz, 10 pin, SMT component. The number on the unit is...
Aug1-13 08:51 AM
NascentOxygen
13 1,141
I'm looking to replace a Dallas Memory Module in a CPU circuit with a parallel EEPROM 28C16 IC. I pulled up several...
Jul24-13 10:05 PM
andrew.grimm3
4 522
I'm just starting to read up on RF circuits, and I'm a little confused about what the characteristic impedance of a...
Jul26-13 05:57 PM
Baluncore
9 907
Can I use the same bridge rectifier for AC as well for DC voltages? My AC mains is regular 265Vac and DC is 40Vdc. ...
Jul25-13 06:22 PM
davenn
3 616
Hello all, I'm a new Mechanical engineering graduate student who needs help using a photodiode. I'd like to rig up...
Jul25-13 04:51 PM
skeptic2
4 888
What is expected in stall torque from a regular car/small tractor starter motor? I measured 7-9 Nm on a starter...
Jul25-13 06:31 PM
MechatronO
2 605
dear experts i connected several capacitors in series . their initial voltages are different. some were at 2.5v...
Jul28-13 12:13 AM
ramonegumpert
2 609
Hello all, I am new here. So you see where my lack of understanding comes from; my background is as a Mechanical...
Jul31-13 01:27 PM
sophiecentaur
10 1,042
What are the conditions that must be satisfied for an object to be picked up by radar? For example, what size must...
Jul31-13 09:49 AM
sophiecentaur
4 788
Hi, According to what I understood, when a terminal is connected to a line, it causes electrons to flow in one...
Aug1-13 05:51 AM
sophiecentaur
4 957
what is the work done by electric forces in moving a charge Q=1 nC from the origin to the point (1m, 1m, 1m) in the...
Jul27-13 02:34 PM
tiny-tim
5 1,087
So I've been working with variable frequency drives recently and am curious about what they're actually controlling:...
Jul26-13 05:56 PM
Mordred
3 506
I was reading some spec sheets for some leds, and it says that, for example, at 1.4V the light is at 650nm and that at...
Aug2-13 01:53 AM
NascentOxygen
8 940
I was thinking lately of taking a few battery-operated devices and converting them such that they could run off other...
Jul29-13 07:48 AM
Runei
1 681
Hello, I want to know what factors determine that a signal (radio wave, microwave, infra red) cannot be use for...
Jul27-13 11:58 PM
davenn
1 394
Hello there everyone. I was wondering about low rpm power generation. Is it better to get an alternator or a...
Jul29-13 06:12 PM
Evo
2 688
Hello everyone, I'm trying to teach myself basic circuit design from an EE textbook, but I'm starting to think...
Jul31-13 09:32 AM
sophiecentaur
4 662
I have a very small project which requires a typical 9v battery for mobile use. But to keep from having to replace the...
Jul29-13 04:01 PM
Tesladude
4 613
Hi all, Havent turned to this forum in quite some time but hoping you might be able to explain to me my y-axis in...
Jul31-13 08:09 AM
lennybogzy
0 378
Ok this may be a stupid question but what the heck. If I have a power supply giving max of 4amps with 35v and what...
Jul31-13 08:55 AM
Tesladude
5 508
Hi Guys, Struggling to find any information on the changes to a cable at altitude compared to at sea level. The...
Jul30-13 08:18 PM
AlephZero
9 867
I stumbled across this ckt - http://husstechlabs.com/support/tutorials/bi-directional-level-shifter/ It says it's a...
Jul30-13 02:10 PM
Jony130
5 571
I read that bridge mode in amplifiers will, for example, take a 100 watt amplifier at 8ohms and turn it to a 200 watt...
Jul31-13 09:20 AM
sophiecentaur
4 803
Each VSC station has the same configuration, and its vectorbased equivalent circuit in the synchronous dq reference...
Jul31-13 12:44 PM
sophiecentaur
3 493
I found 2 equation for calculating the peak to peak ripple voltage, this one is the common one i see, Vripple...
Aug1-13 02:03 AM
256bits
5 3,830
Dumb question - if the phases are tied together in a three phase delta transformer why don't the phases short out...
Aug2-13 09:00 AM
Windadct
2 579
I'm trying to use single ac frequency analysis to measure voltage, current, impedance and phases stuff... But the ...
Aug2-13 09:00 AM
null void
1 1,044

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