Electronics Definition and 631 Threads

Could someone please explain the basics of quantum electronics, as well as it's applications and involvement with semiconductor lasers?

I know this is probably in the wrong board, but. I'v just been looking into some Boolean algebra to convert truth tables into a set of logic gates representing a circuit. If i were attempting to represent a certain truth table, but i was limited to ONLY using NAND gates. (their the only...

I was originally going to take some electrical engineering courses along with my aerospace but have decided to just pursue it as a self study instead. I really just want to be able to do things at the hobby level. Could you recommend a good book or several books that would help get me started...

What is considered the best electronics books for physics undergrads who want to learn the basics of electronics? I would go and buy the art of electronics but many say that is more of a reference book than a textbook.

I have heard that a significant coronal mass ejection or solar storm can knock out the power grid. Can such an event damage all types of electronics making anything with a circuit board useless? Would motorcycles with magnetos still run? (I might ask this question in an electrical engineer...

The voltage regulator have 3 legs, 2 for input and one for output to make a constant voltage. I was wondering if this is possible? 2 x input of 12v and can the output be 24v or only under 12v? thanks

Solve this Electronics Mystery! Hey guys - I really need some help from you experts. My elderly mother and father-in-law have two electrical devices that are, for unexplained reasons, totally incompatible with each other. I need some ideas to identify solutions for this bizarre problem...

Hi guys, I need to find some textbooks which describe basic electronics. More precisely, I would like to learn 1) the components of a circuit (e.g. capacitor, diode, transistor) 2) how do these components work 3) The uses of these components 4) The standard appratus in a laboratory...

Hey! I am in the last year of my 5 year dual degree (which is B.E(Hons.)Electronics and Instrumentation with MSc(Hons)Physics ) from a highly reputed institute. I am currently doing intern at HP Global centre here in India , and I am yet to give GRE but I will be giving it in a two months...

Hey. As an upper level "lab" kindof class I am asked tot take either optics or electronics. To be honest, I wasn't a sucker for circuits in my other physics classes so instead I chose optics because I liked that part of my physics classes. However, would not choosing electronics put me behind...

Hello. I'm looking for electronics diagrams & schematics of very fist TOF mass spectrometers like the one of W.E.Stephens or Cameron's Ion Velocitron. These electronics equipements used vacuum tubes and present very interesting characteristics. If someone knows where I can find such schematics...

To star this post off, I would like to say that I am in not an expert in any field of physics but I do have an interest. So, my question is... Can the human body produce an EM field that is strong enough to affect electronic devices? Examples. computers- I'm pretty competent with them...

Homework Statement I'm unsure where to even start with this question so any help would be appreciated, thanks.

Hey, i am using one of these ICs to provide a 3.3V power supply from a li-ion battery. it works well but has an undervoltage lockout of 1.8v, much too low for a lithium ion battery. here is the datasheet: http://focus.ti.com/lit/ds/symlink/tps63000.pdf now it says on the pin descriptions...

Plz answer these questions. Need them urgently 1. How does Metro Rail work? The Electrical Description about how the Potential Difference is created? 2. What is the significance of direction of current? How is it found for AC Current? 3. How can you identify – live (or phase), Earth and...

When you drop an iphone or some similar electronic device into water, why does it stop working since it operates only at 5V? Water is not a good enough conductor to short out circuit that operates at 5V so how could it damage the device? Does the iphone LCD uses an inverter?

If you were in my place: 1. You want to pursue an undergraduate in electronics engineering degree (or a dual in mechanical and electrical?) 2. You were immature in high school, so now you need to get a high GPA in a community college in hopes to transfer to a university. (Social influences...

Hello, I am interested in tinkering with electronics and learning how to design / execute projects, and I thought I'd start out with a kit. I was wondering what kits, if any are recommended / of good use, and if you don't use them, where you recommend I find spare electronics parts for my...

Hi, I am doing EEE at Adelaide University in Australia. I want to major in Micro-electronics. But all of my friends say it is better to major in Power Electronics as the mining industry is booming all over the world. Apparently it looks easier to get a job in mining. But i want to major in...

i have been looking for an electronics textbook for a while.i am an undergraduate student. already tried the popular millman & halkias.it stinks.can anyone mention the names of some "readable" textbooks?my syllabus covers topics like FET,multistage amplifier,oscillators, OPAMP,combinational &...

hi, I did my B.E. in electronics and communication. I am now working in a Software company for 2 years. I am interested in learning physics. How can i move about changing to physics field from electronics background. I am now refreshing my electronics and communication subjects. I would be...

Homework Statement I have made a picture af a circuit that you can see in the attachment. My teacher told me that at the points (A,C) and (B,D) the voltage (potential) is equal. Because of that there won't be a current between A and C and B and D (Ohm's formule) However, he has made an...

Homework Statement You have an op-amp circuit, a very simple one... All it is is a signal produced (triangle wave) from a generator that is sent into both the inverting and non inverting inputs. what does the output wave look like?? The Attempt at a Solution Im pretty sure this...

I've just read an article about IT with light instead of electrons: http://focus.aps.org/story/v22/st15 I wonder, is there any indication that light processing will be faster than conventional electronics? Information transport is faster, but what about logic operations? What would be...

hey my name is luna i need a help i have got work to do is how to design a common emitter amplifier with emitter resister and emitter bypass capacitor for the following: voltage gain= 70 lower cut off frequency = 135 Hz Take RL as 10k AND quiescent operating points , Vce = 6V and Ic = 2 mA...

Homework Statement If you were to generate a square wave with zero offset voltage using a function generater. What shape wave would the V out be if put through an opAmp?? The Attempt at a Solution For some reason this seems like an odd answer to me, because i want to say a sine...

somebody suggest me some good learning material for power electronics

Electronics / electrical engineering forums often get questions from novices who have trouble understanding the concepts of voltage and current. Invariably, a more knowledgeable person will explain it by giving the standard analogy between electricity and water: voltage <--> water pressure...

Hello. Any good resources which include general information about : 1- Bioelectric signals 2- Physiological transducers 3- Electrodes 4- Biopotential amplifiers for ECG (electrocardiograph),EEG(electroencephalograph),EOG (electro-oculograph).

Hello, Could anyone suggest me some good resource for the elementary electronics physics. Book name or really good link online I want to get the knowledge of electric current, potential, field..and so on Thanks!

Hi, I was looking around at graduate schools and was curious if anyone knew of places where they are doing research into organic electronics or organic photovoltaics? I found a research department at MIT and Stanford, but I was looking for something perhaps one tier below that. It...

I carry my cell phone and my ipod nano around with me literally everywhere I go. Both of them require charging about every other day. I have been thinking about upgrading to a more expensive ipod with video capabilities. But if I do upgrade, I think I would feel really guilty about my...

i'm designing a little project but I'm running into some environmental heat issues that I'm trying to work out. i just need a little clarification and insight from anyone willing. I have this box made of sheet steel that is going to be mounted to the side of a building. the box will...

Sorry if i change the subject somehow. I'm going to do postgraduate studies of medical electronics in germany, so does someone know which univeristies offer this sort of studying and its ranking.

After studying amplifiers and their operation, i suddenly realized today that i don't really know how they work at all. Assume Vcc = 6V for an NPN transistor, biased correctly to fluctuate about 3V In the Vout, once the DC part has been removed, how can the voltage possibly go lower than...

Hmm, how fundamentally important is this device? http://www.pcworld.com/businesscenter/article/145365/hp_researchers_build_intelligent_memory.html http://www.physorg.com/news128786808.html Sounds like it could enable electronics to obsolete us ;)

Nanoscale circuits based on molecules used in sunscreen lotion have led to the discovery of the "missing link" of electronics engineering – a previously mythical device known as a "memristor". First predicted in 1971, the memristor could help develop denser memory chips or even electronic...

Why does overshoot happen. For example in electronics, a square wave oscillating between 0-5V, overshoots 5V by a small margin. When the power supply can only supply a max of 5V, how can the signal overshoot. I guess the same goes for ground (signal going below zero).

I know this doesn't pertain so much to engineering but I figured you guys would know best. If you set the magnet next to a cell phone or TV, what kind of damage would be expected?

How are sine waves converted to current?? Im doing avionics in physics at the moment and we are talking about receivers... i now that the resonate oscilates at certain frequency and the antenna picks up the sine waves that are at the frequency... but how are they then turned into current...

I've been working through our physics book for year 12 Physics, and only just now when we've hit electronics has it really confused me. I'd like to be able to understand it before our current 2 week school break ends. Perhaps the biggest flaw of the book is that it doesn't say how it got...

I'm not really new to Digital Electronics, but this is confusing the crap out of me. My school's started a DE class and at the moment we're getting all our equipment worked out and stuff, but for some reason NONE of our IC's work. We're using a 9-volt batter with a 7805 regulator for 5 volts...

As a freshman student in electrical engineering, I need some projects that are simple but enjoyable. I search it on google but results were not satisfying. If you know useful web addresses about this topic, please share with me. Thank you.

i am interested in weather or not a salvaged magnatron from a microwave oven will be enough to interfer with electronics if it were to be housed in an aluminum box with a tube on the side that the magnatronwould be emitting from to (direct the emissions)?

Wireless networking technology will one day deliver high-definition video content and other large data files via the airwaves far faster than that information can be now be delivered over wired systems. But it will take major advances in the electronics that drive computer and radio-frequency...

http://img48.imageshack.us/my.php?image=tinwhiskersscan2tc0.jpg Just recently where I work we had a large amount of electronics parts shipped back to us because some terminals had tin plating. I have never seen these tin whiskers before and I can't find a good explanation for what causes them...

Homework Statement In many laser applications the volume occupies by a laser beam in a gaiven crystal should be minimized. so how i can define that volume for a gas cell(n=1,00) that is 4cm long, using a laser wavelength of 633nm and placing the focus in the middle of the cell. Homework...

I am reading the manuals of an electronics measuring instrument, in which the term 'float' is repeated several times. Can anyone explain this term? Thanks in advance.

hey guys, I want a book on electronics for christmas as ill be studying electrical engineering next year (ETH Zurich), so through amazon i found Art of Electronics, which has some great reviews. Anyways I am wondering if any of you guys has any experience with this book and can tell me how...

Okay. I'm just looking for someone to check my answer to the following question! I'm not sure this is the correct forum for such a question, if not, feel free to have it moved :) QUESTION: An a.c. supply of amplitude 20V and a frequency of 5 kHz is connected across a Resistor R = 4.7...