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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 5,771
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 4,572
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 75,752
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 84,192
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 54,860
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Mar26-08 12:32 PM
berkeman
0 29,553
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
2 565
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
3 577
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
4 820
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
3 690
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
6 477
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
4 483
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
2 518
Can I get that kw used for that hour from reading the meter in one hour? Thanks
Jul24-13 10:14 AM
Averagesupernova
13 859
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
7 615
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
2 587
So I have been using some small audio amplifier ics in the tda series because they are good and easy to use but I have...
Jul23-13 03:04 AM
Baluncore
17 1,198
Can anyone help me by discussing the charging and discharging methods of ordinary acid batteries which are used in...
Jul22-13 11:31 PM
Chemicist
2 438
This is sort of an engineering question and sort of not but it involves me possible replacing the lithium-ion battery...
Jul22-13 08:18 PM
rboggs10
9 726
So far i have learn Vrms, Vdc and Vac, and this is what i understand Vrms is the power of the voltage, Vdc is the...
Jul22-13 11:52 AM
Windadct
1 1,006
Hello, I am working on a system where a laser does something and then there is a lot of wasted laser radiation. I want...
Jul22-13 11:02 AM
Ezekial
15 686
is there a instrument used to detect under ground water using capacitance principle
Jul22-13 04:55 AM
sophiecentaur
2 420
please elaborate their difference in your own word.. thanks! (SURVEY)
Jul22-13 04:06 AM
sophiecentaur
2 1,036
Is there any video tutorial of PLECS standalone simulation software available on the internet? The website of the...
Jul22-13 01:26 AM
fozia.jehan
0 654
Just have a question: how can I make a steady temperature to heat water or liquid where I have 5 volts with 2 or 3...
Jul21-13 08:58 PM
jim hardy
15 856
I am using a transister model BC107bp in multisim, and i found that its min Hfe is 40 and max Hfe is 450. If I want...
Jul21-13 07:05 AM
Jony130
2 702
Hi, I am using a Human body model which I built for some simulation studies. I was trying to pass DC current...
Jul20-13 10:11 PM
Janakinadh
0 1,044
Hi, I'm building a make shift spectrophotometer. It's only concerned with a narrow bandwidth of visible light. I'm...
Jul20-13 10:14 AM
Baluncore
5 578
In an automatic school bell circuit, The outputs from 3 to 11 are connected to the base of an NPN (BC547) transistor...
Jul20-13 02:44 AM
Baluncore
1 432
Hi everyone, I am an italian student (last year of high school) who would like to study engineering at university. I...
Jul20-13 02:38 AM
Baluncore
2 795
I've had my phone messed up before by metal and I wondered what the metal did to my phone, I'm guessing it maybe...
Jul19-13 05:12 PM
Averagesupernova
4 1,695
Hello, I am trying to find the effective resistance of the NLR in the attachment (to the first order). It is given...
Jul19-13 09:01 AM
NascentOxygen
1 410
Hey guys, Does anyone know about how much transmission power is outputted from a cell phone call? I have read it's...
Jul19-13 08:56 AM
Baluncore
3 489
http://www.slideshare.net/viv3ksharma/automatic-school-bell In this circuit I Think the emitter and collector...
Jul19-13 07:47 AM
NascentOxygen
1 451
I just managed solving this question, so thread might as well be closed.
Jul19-13 07:45 AM
peripatein
1 529
Hi friends, I have a system (with unknown properties) which takes an input vector of length 10 and...
Jul18-13 11:36 PM
dexterdev
2 624
Could you kindly show me as to how to meggar a transformer step by step with relevant pictures ...?? Very...
Jul18-13 10:12 PM
Baluncore
10 848
I was reading through an article on, "Shunt Reactors for Voltage Control" and I am slightly confused. (See link below...
Jul18-13 09:27 PM
Baluncore
1 407
I would like to build a small solar powered phone charger for when I go up to camp soon, I was planning on using a...
Jul18-13 11:37 AM
amanno
1 431
Hi, I have a question concerning convolution. I don't quite understand the boundaries of the integration in the...
Jul18-13 11:33 AM
peripatein
22 625
Hey everyone, I'm a bit confused about how exactly the transformer works. What I have gathered from wikipedia is...
Jul18-13 10:48 AM
Averagesupernova
4 785
I'v been doing audio for a while but have never used standby/mute, can someone explain it simply as to what they are,...
Jul18-13 08:14 AM
Tesladude
0 413
Hi all, ME major here that's very confused about the integrating op-amp. It's pretty simple what I am confused...
Jul18-13 03:50 AM
cmmcnamara
2 377
Hi, y(t) is the response of LTI system A to x(t). How could I have figured out that y(t) = x(t) - x(t-2a) (please see...
Jul17-13 03:44 PM
peripatein
2 386
Hi, Would someone care to please explain why no current passes through R1 (see attachment) in case Vs is replaced...
Jul17-13 01:14 PM
Windadct
20 655
Please Read! I know that cars need batteries to generate electricity to the dynamo to make the dynamo produce...
Jul17-13 05:48 AM
russ_watters
4 483

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