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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 31,235
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 95,169
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 58,555
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 83,017
Hallow!! For real it's not clear to me on how the thermal voltage in a semi-conductor is established... Can any one...
Aug8-14 12:06 PM
tasnim rahman
8 12,879
I am studying thyrisors right now. I am really struck at trigger circuit . The book shows gate source voltage and gate...
Aug10-14 11:04 PM
NascentOxygen
6 349
i have a doubt regarding the starting of a tubelight that whenever we switch on the light then we require a very high...
Jun22-13 02:21 AM
Faraz Murtaza
8 1,341
I have a N-ch Mosfet load switch that connects to a WiFi module on a circuit board. When the switch is turned OFF, I...
Jun20-13 02:09 PM
likephysics
7 1,021
What impact will a extremely high frequency of ultrasound have on a electromagnet? Will the magnetic field also...
Jun21-13 01:27 AM
davenn
4 718
The figure shows a transistor with a bias circuit. If Ic=50IB and if VBE=0.7V, find VCE....
Jun22-13 03:39 AM
user5
5 1,031
A friend of mine lost his battery charger for his airsoft gun and he naturally comes to me for electrical help....
Jun22-13 08:13 PM
Simon Bridge
10 806
I have a room where no outlets work. The fuse looks ok. What are some things I can test for or look for before I...
Jun26-13 01:16 PM
Integral
24 1,868
Hi. I am mechanical engineer , and I have presentation somewhere next week about sensor of my choosing. The thing...
Jun23-13 01:11 PM
jim hardy
7 1,040
Why vacuum tubes can not be made small sized ? I'm talking about millimeter to micrometer or maybe even nanometer size...
Jun20-13 10:12 AM
Averagesupernova
5 640
I'm going into my second year of a 2 year electrical technology diploma (technologists are like middle men between...
Jun21-13 11:02 PM
jim hardy
3 641
Hello, I am wanting to build an uninterrupted power supply for a certain device that has multiple electronic...
Jun24-13 12:52 PM
berkeman
13 1,001
Is it possible to measure the direction of a current at current magnitudes this small? Or only its magnitude?
Jun21-13 08:44 AM
jim hardy
3 488
Hey everyone, I have built a circuit which includes a PIC. The logic is that if a specific pin gets a logic 1, the...
Jun22-13 03:23 PM
Zalajbeg
2 502
Hello everyone. Is there a place online where there are electric drawings and schematics with descriptions of...
Jun22-13 03:43 PM
Hrvoje
0 610
Hi, I need help with my electro magnet pulse with modulation PWM. I have a Velleman® IR Light Barrier Kit from Radio...
Jun26-13 06:10 PM
EagleOnePro
4 1,976
Hi. I have a question about the way MSG and MAG values are given by some microwave transistor manufacturers. For...
Jun23-13 07:30 AM
Bromio
0 423
Hello guys, I made an amplifier using the STK4191 II about 3 years ago. And it worked fine. But I haven't been using...
Jun23-13 12:17 AM
MIURU
0 427
SO I ordered the axe026 serial preograming cord to use with my picaxe 08m2. To plug it into the usb I am useing a...
Jun25-13 05:51 PM
davenn
6 675
Can anyone recommend me a good book or online resource for embedded system's software design? Preferably a book that...
Jun23-13 08:34 PM
Jyan
0 436
Hey everyone!! I've gotten some really good help over in the math section of physicsforums, and I was hoping to get...
Jun24-13 12:50 PM
coljnr9
4 496
Hi Folks, I have designed a rectifier and a regulator as independent entities. Both of these blocks are working...
Jun24-13 08:36 AM
Windadct
1 391
Hello. I was curious on how the content of an UV-eraseable EPROM chip degrade when it's being erased. So, i put a...
Jun25-13 06:14 PM
Averagesupernova
6 1,007
Greetings everyone. Does anyone know of any flat pressure switches? I am trying to build a keyboard sewn into a shirt...
Jun24-13 01:06 PM
kb_designer
0 999
I'm working on a project which deals with temperature control of a room. the idea is to control temperature within a...
Jun24-13 03:58 PM
Floid
3 480
Hey guys, I am new to the forum and came to here to ask for help on a project that I am trying to construct. I have...
Jun26-13 02:10 PM
Windadct
3 662
Hello, I attached a picture below but I am confused as to how the voltage comparator is comparing the two inputs (I...
Jun26-13 12:09 PM
tachyon_man
2 469
This looks like it's mainstream work being done at the Naval Research Lab -- interesting stuff: U.S. Navy's new...
Aug12-14 04:41 PM
BigWill
35 2,187
Hi, Please watch the following video: http://www.youtube.com/watch?v=9ckpQW9sdUg If the capacitor did...
Aug8-14 01:15 PM
berkeman
15 438
I have studied that "zero signal collector current should be atleast equal to the maximum collector current..." but...
Aug12-14 05:31 AM
sophiecentaur
11 449
I am looking for a way to make my own "force sensor" similar to this Vernier dual-range force sensor for high school...
Aug10-14 05:19 PM
jim hardy
12 461
I was working on trying to find the short circuit current rating of a 120 volt panel fed from a 7.5KVA transformer. ...
Aug11-14 10:14 AM
psparky
10 349
Hello everybody, I am trying to figure out how to build an electro magnetic generator in order to stimulate my home...
Aug8-14 10:30 AM
Drakkith
1 232
Hello all. I have been looking into RF amps. I have come across the following cascode amp (from ARRL handbook 2014, p...
Aug12-14 12:49 PM
perplexabot
9 287
Hi, I am designing a channel switching all tube guitar amp that I have two channels and be able to switch between the...
Aug10-14 11:54 AM
jim hardy
20 456
I noticed that common technology such as brushless DC motors use AC to drive them. What exactly makes DC brushless...
Aug11-14 01:41 PM
sophiecentaur
2 253
Hello everybody, I am trying to figure out how to build an electro magnetic generator. I was wondering if an audio...
Aug11-14 11:05 AM
berkeman
9 349
This is last nights chart (from about 10PM to sunrise) into about a 3K load from about 500W total of panels. The hump...
Aug12-14 01:45 PM
nsaspook
16 436
I don't understant how the positive electrode can attract both electrons and the positive Li ions as they both flow to...
Aug13-14 02:55 AM
steviereal
8 283
Hi guys I'm new here and need map some help. I have built a simple circuit with a cd4017 IC. The circuit works...
Aug11-14 09:14 PM
Okefenokee
2 170

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