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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 6,814
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 5,679
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 78,527
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 88,532
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 56,199
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Mar26-08 12:32 PM
berkeman
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I want to know if I am figuring correctly. I am putting together a 12 volt 3 amp DC power supply. The formula in the...
Aug25-09 11:33 PM
Carl Pugh
3 2,443
Hi all, At work we were working on a bus-hold issue that we fixed with a bit of an unconventional method. We had a...
Aug25-09 06:26 PM
ConeOfIce
7 1,462
Hello All: A project of mine requires a bi-directional inverter that will take a 12VDC (most likely) battery to...
Aug25-09 03:56 PM
alsotari
2 4,778
We have a synchronous, brushless (not permenant magnet) generator with the following ratings: 3 phase brushless...
Aug25-09 09:27 AM
Bob S
4 1,399
Given the current state of the jobs market, would the current Electrical Engineers still encourage new Engineering...
Aug25-09 01:12 AM
b.shahvir
7 2,670
Help! I need to build an in-phase sine wave generator with quadrature output and its frequencies are between 1KHz-12...
Aug24-09 11:39 PM
Mike_In_Plano
7 6,419
I am using a digital genset controller that to run and protect a generator. This controller has, in addition to other...
Aug24-09 10:11 PM
negitron
8 7,747
hi there I'm up to design a device which switches on when human body touches it. I have a rough idea to use IR,...
Aug24-09 02:56 PM
0xDEADBEEF
5 3,490
I am looking into purchasing the APC H15 power conditioner. I've tried to read on websites to get an answer to my...
Aug24-09 02:25 PM
Mike_In_Plano
2 902
I'm working on a design for an electric bike. I need a free sim I can download to develop it: test it, see it work...
Aug24-09 02:14 PM
happy_hipster
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I have an opportunity to purchase a surplus but new 3 ton central AC (heat pump) system for my home at an attractive...
Aug24-09 01:50 PM
stewartcs
13 52,512
Can anyone tell me what triax cable is good for. As far as I understand it, it is unbalanced so you cannot use it for...
Aug24-09 10:39 AM
0xDEADBEEF
6 1,985
I see some devices have voltage and amperage ratings on them. Are these just the recommended operating conditions? Or...
Aug24-09 06:49 AM
Jim Sanderson
2 1,510
Can someone explain to me what are filters (DSP) in plain english? Fir filter, IIR filter,... Chebyshev,...
Aug24-09 01:10 AM
chroot
5 1,070
Dear friends, I am writing to ask for your advice. I have an undergraduate and master's degree in economics, and a...
Aug23-09 11:16 PM
changeseeker
9 1,312
So, let's say you have a signal, bandpass filtered between 10Hz and 1000Hz. The signal is then sampled at 2000Hz. A...
Aug23-09 06:24 PM
chroot
13 6,200
Hi everyone, I been trying to modify a headphone amplifier that I have to make it better for my specific headphone...
Aug23-09 12:30 PM
renegg
3 899
Hello, I have a 240v water heater with a machincal timer which went bye-bye after I installed it over 15 years...
Aug23-09 12:47 AM
Danger
30 5,789
Hey Guys I have been experimenting with electrical engineering for the past few months and I now am interested in...
Aug21-09 08:11 PM
vk6kro
19 4,035
If I have an op-amp with say, a hypothetical bandwidth of 1 MHz, and I use it in a configuration where I have a gain...
Aug21-09 10:37 AM
uart
1 2,840
Hi guys, I'm looking to find out if there is a ratio between short term and continuous current for power cables. I...
Aug21-09 04:28 AM
Darryl
14 2,287
Hi, I'm new here so I apologize if my question isn't composed appropriately. Iím currently designing water...
Aug21-09 02:51 AM
Darryl
12 1,090
The equation widely used to calculate the force on a projectile in an electromagnetic launcher, more specifically a...
Aug21-09 01:26 AM
axi0m
5 3,651
I've got quite an unusual hobby project and so far, after couple of nights googling, I haven't found software that...
Aug20-09 05:59 PM
TRan
6 1,635
Hi, Here's stupid question.... Been trying to think about what happens to the current and the voltage when you add...
Aug20-09 02:21 PM
Bob S
9 5,176
Will a bridge rectifier circuit without a filter or load resistor connected across its output deliver a pulsating...
Aug20-09 12:31 AM
Phrak
13 7,343
Hello, new kid on the block here. I have read the rules and hereby present my question. My aim is to calculate the...
Aug19-09 02:07 PM
Bob S
10 1,650
Hello I am a student working on at home project and I need help on choosing a compressible, soft material that works...
Aug19-09 01:23 AM
Danger
3 1,745
I understand three-phase motors and how the phase offset could produce a rotating magnetic field and a torque. But...
Aug18-09 02:13 PM
likephysics
13 1,561
Hello I want to ask that in all customers or house electrical lines AC voltage are forming sinusoidal waveform. ...
Aug18-09 10:07 AM
m.s.j
4 2,103
hello i work on electronic devices , i have a multilayers metalisation- semiconductor ie...
Aug18-09 06:05 AM
sarah1
0 1,235
I need a way to limit the maximum voltage that goes to mic input, for e.g. if the amplitude of the signal is 100mV...
Aug18-09 04:37 AM
likephysics
8 1,177
Hi, I am planning to use SPI mode to interface a eZ430-RF2500 with a Sandisk Secure Digital Card. The eZ430-RF2500...
Aug18-09 03:57 AM
likephysics
1 4,655
My specific question is "How is electrical energy made available to devices?" Everyone knows that "devices transfer...
Aug18-09 02:19 AM
cak942
4 1,038
Hi all, I am trying to use an optocoupler to isolate two circuits. Right now, I am trying to get a simple...
Aug17-09 02:21 PM
williamshipman
22 2,490
I plan to use a automatic genset controller to protect/run a synchronous generator. This controller determines when to...
Aug17-09 07:38 AM
Mike_In_Plano
4 7,716
Hello All, I'm working on a project that requires an isolated switching supply that will output 15V from a 9-18V...
Aug16-09 12:44 PM
Jdo300
4 28,269
Hello, for technical reasons I'm looking for a schematic of an Op Amp built with discret components and having GBP...
Aug16-09 05:14 AM
fleem
4 874
Hi I'm interested to know what Electrical/Electronic Engineers spend their day doing and the projects they work on....
Aug15-09 01:39 PM
negitron
1 1,544
We are testing an Air Handling Unit, we need to raise the internal temperature by 30 degrees to pass the test, but...
Aug15-09 12:48 PM
JaredJames
3 1,100

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