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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 6,943
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 5,800
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 78,902
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 89,072
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 56,353
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Mar26-08 12:32 PM
berkeman
0 30,240
I am building a pulse oximeter, and there is a photo diode that is reversed biased by 4.5 volts. When there is a...
Apr23-11 05:52 AM
larny
26 5,090
I am in need of creating a 4 layer PCB stackup, but I need to have one of the PCB different width and length to create...
Apr22-11 08:21 PM
Proton Soup
2 4,659
Hi friends, I have a samsung mobile charger with specifications as Input: 150-300V AC and 0.15A Output: 4.75V DC and...
Apr22-11 08:09 PM
vidhyarthi
6 1,149
So I've been trying to work on this project that requires me to take a 12V AC to DC adapter (says 300mA on it) and...
Apr22-11 07:49 PM
fulmenatrum
8 4,858
Cheers
Apr22-11 07:33 PM
vk6kro
3 1,601
Hello, I want to come clean with rectifiers. Mainly half wave rectifiers with filter. ...
Apr22-11 04:38 PM
skeptic2
6 6,023
I am less than a novice regarding electronic issues and understanding circuits , and need help in terms of seeking a...
Apr22-11 01:20 PM
berkeman
1 628
I want to make a Van de graaff generator loosely based on this design, but I want to make it a bit bigger and more...
Apr22-11 12:08 PM
Evil Bunny
0 547
Hi I just have a quick question for a feedback potentiometer circuit what is the purpose of the resistor R25??? Please...
Apr22-11 08:06 AM
omnikey
10 4,005
For years I have mastered the art of simulation and testing, but I almost never seem to be able to find SPICE models...
Apr22-11 12:56 AM
berkeman
2 1,409
This is the way I understand Mosfets (NMOS) The source is grounded, drain is at some positive voltage V, gate is...
Apr21-11 11:54 PM
MATLABdude
1 1,213
So, my goal is to be able to take two walkie talkies and put one of them on a near space balloon and have a...
Apr21-11 11:20 PM
Xarren
5 2,008
I want to doing a project for wireless transfer of data biomedical for example data of ECG or EEG ...with zigbee. ...
Apr21-11 02:57 PM
schip666!
2 895
Hi everyone, :smile: I was wondering why they only use 5th and 3rd groups elements to create n-type and p-type...
Apr21-11 03:56 AM
MATLABdude
2 1,048
Hey everyone, I just went to Radio Shack and picked up a few parts to begin a book on Electrical...
Apr21-11 01:12 AM
PwNakahn
2 895
In high speed digital designs, there is a series terminating resistor to match the output impedance of the driver IC...
Apr20-11 04:28 PM
Bob S
7 2,382
Dear all I am slightly confused over the equations for skin depth. My university notes give me the equations: ...
Apr20-11 04:23 PM
Bob S
1 3,148
I am working on a space balloon project and I wanted to send video, or pictures, back to earth via walki talki. I...
Apr20-11 01:32 PM
Studiot
18 2,458
Hi, The following circuit is the the very basic form of an Hbridge inverter driving a parallel LC tank at its...
Apr20-11 05:14 AM
sina_stuck
2 974
Using a neon 15kv transformer rectified (NTE5342@ 40 amps) to dc at the transformer input, I don't want to rectify the...
Apr19-11 11:42 PM
Jiggy-Ninja
2 1,231
hello i am new, i thinking to make a fm radio receiver but i don't know what i need (capacitor, oscillator etc) can...
Apr19-11 07:53 PM
vk6kro
9 1,997
Hey everybody, I've been trying a bit of an experiment involving cascading an inverting logarithmic amp with an...
Apr19-11 07:08 PM
Bob S
7 2,731
There are lots of for metal cutting measurement. However, thermocouple is not in the list of metal cutting...
Apr19-11 05:52 PM
0xDEADBEEF
1 962
Dear all, I measured some very nice data, but it's difficult to analyze, but I try to get out of it what I can. I...
Apr19-11 05:26 PM
0xDEADBEEF
1 1,360
I was studying First and Fourth quadrant choppers and that got me thinking. Can the chopper run in the first and...
Apr19-11 12:30 PM
Xarren
3 909
Hello Everyone, I am working on a system for an undergraduate project that uses pulse width modulation to power two...
Apr18-11 05:03 PM
Xarren
16 3,786
What is the meaning of full load and no load, in the context of motor? Does the load here mean mechanical load?
Apr18-11 02:44 PM
dummie
5 3,155
Hello Guys, I am planning to design electrical grid connected with solar distribution generation system using...
Apr18-11 01:27 PM
tangu_14987
0 1,546
I need to find out how a certain pulse width modulation duty cycle is used in SMPS power supplies (specifically a...
Apr18-11 12:53 PM
berkeman
1 2,249
I work in a laser lab and I'm constantly hearing about electronic components that I don't understand (my background is...
Apr18-11 09:33 AM
sophiecentaur
2 2,454
Hi, I've understood the basics of an RLC circuit but it seems that when actually putting them into practice I'm...
Apr18-11 08:19 AM
Nemode
3 3,762
i want use plc program to I want Basthaddam 2 TON timers seemed to run the bulb of 6 seconds and not run them at...
Apr18-11 07:18 AM
legendhollow
1 697
hi every body i want to know what is meant by semi blind detection and data equalization. also do i know the...
Apr18-11 04:25 AM
oufa
0 648
I realize this probably fits better in Academic Guidance but I figure I'll get better results here. I'm trying to...
Apr18-11 04:25 AM
Maru
21 4,752
Hello good people. I need to run a brushless motor on an esc but the equivalent speed controller is three times the...
Apr17-11 10:09 PM
vk6kro
2 1,437
I am being confused at a basic grounding question. I think the only reason, why you get a shock if you touch a live...
Apr17-11 08:20 PM
russ_watters
26 764
i have an assignment on PF vs frequency in 3phase diode rectifier the DR want me to draw a graph and stuff but im not...
Apr17-11 04:01 PM
jad.mak
8 2,107
nvm answered my own question, someone delete this please.
Apr17-11 01:51 PM
OopsIDied
0 474
Dear! Can anybody please explain this pulse induction metal detector.plz Please let me know what does these op-amp...
Apr17-11 04:46 AM
zahidkjatoi
0 988
hey,dude,i m confusing about the precision rectifier...why the Vout =E,my question is why the Vout=E - V(diode) ?why...
Apr17-11 01:28 AM
xw0927
2 1,458

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