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Jan16-12 Greg Bernhardt
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 95,221
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
28 58,578
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
63 83,064
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Mar26-08 12:32 PM
0 31,247
I have built a LC parallel tank circuit, and I am having a problem with it. I have a ground that is placed between two...
Apr25-09 09:01 PM
8 922
How come these two functions are used interchangebly? A sampling function is supposed to be a square wave with a very...
Apr25-09 04:06 PM
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Hey, I was looking at a car and the dealer told me the battery is at the back in the trunk. When he opened the hood he...
Apr25-09 01:20 PM
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I am looking to build or Gerry-rig up a system to transmit a composite video feed from a car over a distance of 1 mile...
Apr25-09 12:34 PM
1 3,795
I have this equation and the following values for a transformer Bmax= (V1)/(4N1fA) V1=10v, i.e. 20v peak-to-peak...
Apr24-09 05:22 PM
Bob S
1 803
In my lab we're doing some stuff with logic chips and d-flip-flops and in our kit of circuit components are a couple...
Apr24-09 01:44 PM
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What is electricity? Let me use the example of turning on a light in a room. I have been told that when I flip the...
Apr24-09 01:06 PM
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Hi, I am reviewing a ground grid study of a substation for a wind farm that is being built. The ground grid will...
Apr24-09 08:51 AM
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I am trying to build a vampire proof laptop charger. Vampire proof meaning that the charger will not consume power...
Apr23-09 11:58 PM
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I'm working on a circuit for a hobby project (not homework). In this circuit is an IC that carries out the functions...
Apr23-09 10:25 PM
3 2,485
Hello. I am currently trying to evaluate just how much power the external RC circuitry of a 555 timer uses over 1...
Apr23-09 12:51 PM
Bob S
5 3,226
Hi, I found this question from a textbook: Suppose there are two black boxes, Box A has a 1V voltage source and...
Apr23-09 11:14 AM
2 6,160
If a current enters the negative terminal of a polarized capacitors, does the negative plate have to be fully charged...
Apr23-09 03:03 AM
6 3,935
Hi, i am building an inverter 12VDC- 120VAC, 50 Hz with square wave as gate signal for MOSFET. Looks like my...
Apr22-09 09:58 PM
Bob S
7 1,905
Hello all I would like to create a toroid with 3 phase windings connected to a three phase switch connected to 220V...
Apr22-09 08:20 PM
8 1,340
Hey guys, As a hobby I've decided to pick up EE and I've been reading quite a bit and I'm interested in building...
Apr22-09 06:37 PM
13 3,602
Like the title says, I am wondering if it is possible to rectify an AC signal and run it through an AC transformer. ...
Apr21-09 11:54 PM
9 1,770
Is the x-axis of a Bode plot supposed to be angular frequency omega or just the frequency f? The y-axis is in dB. ...
Apr21-09 10:18 PM
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RC Circuit -------------------------------------------------------------------------------- Hi guys, im trying to...
Apr21-09 09:05 PM
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I have a lot of general questions on the design of RF antennas. Where do the geometries come from? I've been...
Apr21-09 07:46 PM
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I had a small, about 1 foot secondary tall tesla coil with about 3 inch leaders coming off the toroid, and when i...
Apr21-09 07:15 PM
1 826
I have a device that generate a pulsating current(2s 2A,2s 0A), and i would like to convert it to a continuous dc...
Apr21-09 12:17 PM
4 715
the source is 120V DC with an internal resistance of 40 Ohms. the battery's emf is 10V with an internal resistance of...
Apr20-09 02:38 AM
3 1,109
Hi. I use an LM317 in constant current mode to vary the current from ~20ma to ~400ma, the voltage use is about 3 to 5....
Apr20-09 01:44 AM
3 4,386
so, i'm pretty bored and decided that i want to make a speaker. i've bought some thick copper wire, and twisted it in...
Apr19-09 10:25 PM
Proton Soup
9 1,043
Hi, I am using a Wheatstone bridge to measure very low resistances (around 0,2ohms) and my measurements are changing...
Apr19-09 09:26 PM
6 1,717
I am using a softmark 3 motor USB stepper controller and I need to control it to make the 2 steppers that I am using...
Apr19-09 10:01 AM
0 1,528
Hi all! I've got a question about the quantity referred to as 'self-capacitance'. From what I can gather,...
Apr19-09 09:43 AM
6 3,746
I suspect this is a very stupid question but: Why is voltage across a component (say, an LED) important? Isn't...
Apr18-09 10:51 AM
4 1,984
hi, I've got simple circuit with noninverting op amp. There are two resistors by which gain is set. And as far as I...
Apr18-09 01:42 AM
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I'm posting this in a forum because i'm not really sure what to search for online. I need a circuit that transmits a...
Apr17-09 09:45 PM
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Hi guys, i been recently implementing TCS230 for my final year project, so i have did few experimental stuff on TCS230...
Apr17-09 05:41 PM
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hi I have a guitar hero world tour drum and it is only powered by 2 AAA batteries. Basically, I want to connect it...
Apr17-09 12:16 PM
8 3,611
Hi all, If a CV curve obtained for an n-type substrate thin film is approximately flat, i.e the capacitance value...
Apr17-09 12:40 AM
0 908
We have a four wire PT100 signal conditioning circuit, which transpires resistance to voltage. 7mV constitutes one...
Apr16-09 11:34 PM
7 2,637
Hi guys, I have a very simple question but which is messing with my mind. I'm trying to figure out the voltage...
Apr16-09 11:25 PM
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Hi! I need some help to solve a problem I canít get my head around. I would be very grateful If someone could help...
Apr16-09 05:38 PM
Or Entity?
9 1,008
I need to produce at 0-5AAC in the millivolt range to test a current to current transducer. The ac amp source to the...
Apr15-09 05:26 PM
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Hi, If i have a capacitor rated x micro-Farads. And i know that it is charged to a certain voltage. And it's being...
Apr15-09 04:43 PM
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How do LEDs behave in presence of magnetic field?? Any good books or papers dealing extensively with this?? thanking...
Apr14-09 06:49 PM
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