Electronic Definition and 422 Threads

Hi I do not have much knowledge on engineering but please would someone help me look for a device like an electrical nose and tell me how I could acquire one. Let me be more descriptive: Say, this device might have a comopund attached to it that is made up of all kinds of odor...

What is this(copper-coil one)?

What is this ( silver colour one )

What is this ( the yellow colour one ) ?

What is this ( the black colour one )?

2A302J is what electronic component ?

Hey guys, I'm going to university next year to complete a degree in electronics engineering and I'm hoping to get a head start. Ok I've attempted to read several online materials to try and create a mental model of what occurs in an electronic circuit. Let's assume its a basic circuit with a...

I have been asking many questions trying to really get a feel for what someone in the field of Electrical Engineering really does, but now I realize I have been asking the wrong question. What I really want to know is: What kind of cool stuff can an Electrical Engineer build in his garage for...

I love them both. Which one do you think is more useful? Which one has more general application in everyday life?

Hi, I'm a freshman studying electronic engineering (A 3 year program in my university). Lately I've been going through a lot of the posts here on this forum and I couldn't help myself from wondering where I could find myself in 3 years time or maybe more if I decide to go for a masters...

Hi, I'm a freshman in an electronic engineering program in university. Throughout the course we're supposed to learn how to program using C. I was wondering if it would be a good idea to learn C++ on my own instead. From what I gather, C++ is a superset of C however I've also been told that...

I'm trying to get some sort of value for the electronic contribution to the thermal conductivity of copper. Most sources seem to give the total thermal conductivity K=400 \mathrm{W/(m\cdot K)} at room temperature. The electronic contribution should be given by the Wiedemann–Franz law...

This is my first post and I am really excited to find a forum that is full of people who know WAY more than I do about electricity! I am wiring up a lighting rig that will mount on my fire helmet. I am part of a great fire department and we are unhappy with what is available to provide us...

Ok guys, a buddy of mine gave me a broken flatscreen computer monitor. I've had a lot of exposure to capacitors and recognizing when they are bad and need fixed. I pulled the monitor apart and sure enough the caps were bulging. I replaced the two that were bulging and plugged in the power...

im currently doing my first year in computer eng.,the thing is I am not sure if it suits me because i don't have any computer background plus comp.eng seems to be unrecognized in most instances (that is here in south africa).i did electrical technology in my high school years and it seems like I...

The other day, I was sitting down watching TV, then I turned the TV off, and the DTV, and I noticed a sort of ringing high frequency humming in my brain. But the strange part was that when I turned my head 90 degrees, it stopped or got really quiet. Turned my had back to normal position sound...

Will they replace the traditional cigarettes, like DVD players have replaced VCRs? And are they really a safer alternative or is that just marketing? I'm not a smoker, by the way.

Homework Statement Describe a possible set of quantum numbers for the 44th electron in mercury. The Attempt at a Solution I can't help but feel a bit embarrassed by some of the questions I ask on this forum. Nevertheless, I am having problems with figuring out what the magnetic...

Tell me what makes electron have a charge , what is that property of electron due to which there is attraction /repulsion between two electrons ?

I’m hoping someone will help me fill in some holes in my understanding of the electronic wavefunction. I understand the electronic wavefunction to be a *complex valued* function of the positions of all electrons in the system. But, most descriptions of atomic orbitals refer to the various...

Excuse me. I am an accountant. No physics at all. But, is it possible to do outdoor soundproofing? I envisioned a setup of portable poles that could in effect soundproof an area with electonic or magnetic frequencies by blocking or effecting the sound waves coming from that area. Kind of like a...

Homework Statement A long, straight horizontal wire carries a current of 2.50 A directed toward the right. An electron is traveling in the vicinity of this wire. A)At the instant the electron is 4.50 cm above the wire and moving with a speed of 6.00×10^4 m/s directly toward it. What is...

Show how the band model can explain the relationship between the optical and electronic properties of solids? any ideas one were to start looking? lost with this question

I had a small, about 1 foot secondary tall tesla coil with about 3 inch leaders coming off the toroid, and when i turned it on, I had an LED bike blinker light that would turn on when I would turn on the tesla coil. The blinker was about a foot away from the coil. I was wondering if anyone...

Dear friends, Plz. tell me about 'Electronic quenching' in Geiger Muller tubes.Thanks.

Hi everyone, I am new to the forum and i am looking at a software that will help me simulate circuits. i have been using Pspice but I am not really happy with all its features. can someone please suggest something better for me? Eagerly awaiting a reply. thanks lakshmi

Sept 2008: $550 Billion Disappeared in 1-2 hrs in an "Electronic Run on the Banks" Well, that's what Paulson and Bernake told Rep. Kanjorski (D-PA) anyway For those who don't know, the Great Depression's economic damage was mainly caused by bank runs(en masse customer withdrawal of deposits).

Homework Statement The problem is: find all possible quantum numbers for each electronic configure of carbon. 2. The attempt at a solution I don't quite understand what the question is asking. Does it ask first write down the electronic configuration and write down all quantum number...

Hello all, In my research, I use DFT from time to time using SIESTA or VASP. I have spent much time reading up on the various aspects of DFT and think I have a pretty good handle on it. In order to prove this to myself, I would like to start to write my own code. I am however finding that...

Find the electronic & molecular geometry and polarity of the molecule XeO3F2 For both electronic and molecular geometry I found to be trigonal bipyramid. The polarity of this molecule is Polar. Is this correct?

Draw the lewis dot, identify the electronic and molecular geometry and determine the polarity of a) NO2Cl and b) SOCl2 a) N has 6 valence electrons O has 6(2) = 12 valence electrons Cl has 7 valence electrons Total : 25 For the Lewis Structure: (* is for space) O-N-O **| **Cl I...

Allow me to be so bold as to ask,how do you build an Electronic Inclinometer to measure a boat tilting until it reaches a 5 degree angle. When the boat tilts to a 5 degree angle, the inclinometer has to be able to read the 5 degree. The Inclinometer has to be waterproof because it will be...

hi guys tell me something i have seen electronic ballasts for florecent tubes, they come in different wattages as well as the florecent tubes, what i need to know is the following... 1. if i get an electronic ballast that states 15watts and buy a florecent tube that is 20watts would...

Hi all ! I am a high school graduate and am hoping to pursue a degree in electronic engineering. But, I am not sure if electronic engineering matches my interests. My interests are in computer, communication systems, digital devices, and also programming the devices, etc. Is electronic...

Hi there I really need help am terribly confused and i need to decide on a career .. uff .. so here it is, i have two options is either aeronautics or electronic, i love both i really do and I know i can do well on both however my window of getting one is closing, so on one hand i have...

Why there are much more metallic elements in the world than the non-metalllic one? We can see on the periodic table most of the elements are metallic but why? is there any relevance to the electronic configuration? I can't find any helpful web-site to solve this problem.Please give me some...

I was wondering if anyone can solve this odd problem. Chromium is known to vary in the number of valence electrons and in this case, I would hope it has 6. Lead has 4 and oxygen 6. If you were to draw its Lewis dot structure with Chromium in the middle you would leave out Pb without any filled...

I am researching on futuristic devices and technology innovations in consumer electronic devices. I think the next wave of innovation is coming from areas like the following: Home automation, home security/ biometric solutions, extension of Bluetooth beyond cell phones and laptops to...

This is definition of resistor from Wikipedia. 1. " A resistor is a two-terminal electronic component that opposes an electric current by producing a voltage drop between its terminals in proportion to the current" And this is another mention about Ohm's Law from a diagram of Wikipedia...

One of the best sources to learn about a particular subject area in a field of study is to read someone's thesis. In this thesis, in one shot, the author has covered rather well the technique of angle-resolved photoemission spectroscopy (ARPES), many-body physics, BCS superconductivity, Fermi...

i need to learn basic stuff about parts of an analog trainer, oscilloscopes, resistors, potentiometers,diodes, transistors... i mean all about electrical engineering experiments and devices... - this book shall orient me how to use these stuffs - this book must guide me on what parts to buy in a...

Hi all. Recently I have started to make electronic music, mainly using Reason. Just wondering does anyone else have any recommendations on software I should check out. Thanks.

Okay. I'm no electrician, but that's why I'm posting. I've been working on modding an electronic keyboard for some friends. Its a really simple little thing, basically a stylophone in a keyboard case, runs off of 4x AA batteries. Like a child's toy keyboard, really. Ive cracked it open for...

Hello guys :smile: I got a small question with voltage and charge. If voltage provides potential energy for charges why doesn't the voltage decrease all the time when the charges are moving. I mean I only see voltage change when their are resistors and stuff but my question is shouldn't the...

Can anyone tell me which sort of energy or frequency is able to create a change in electronic appliances… such as thermostats and TV’s etc?

hi all. I am from Russia. I want to ask a question as called my specialty. I am going to work in Canada. My speciality in Russia called designer radio electronic equipment. Now my responsibilities at work are: the choice of future device design, spatial layout comprising elements modeling hull...

Hi The company I work for has a Dyno room for tuning its engines before sale. Can someone advise me on an electronic noise retardant please? The room where the Dyno is situated is quite small and doesn't really have the ability to be lined with a material unless it were less that 25mm thick. Penn

Dear all, Is it possible to supply 5V from a single 7805, to multiple number of ICs, some of which are safety critical? I have one PCB having ICs meant for the safety critical applications. And also have another PCB for the Human interface. Can I directly get the 5V from the first PCB...

Why do people want all these mainly electronic gizmos, okay the Internet is the best thing since sliced bread , but beyond that, having everything at the touch of a button is surly counter to being human.

queston Determine electronic configuration of Fe and the ground state using hunds rule Equations Hunds rule my attempt got the configuration easy enough 1s2 2s2 2p6 3s2 3p6 3d6 4s2 problem I have is with huunds rule can't get started I am sure one example and il be ok with it.