Electronic Definition and 422 Threads

Hello everybody, Please i need a reliable software to use in electronic circuit design, and to check the circuit to be working before manufacturing,i mean not to make it, and then find that it doesn't work, so software to design and another to do analysis of the circuit, or one software do...

Hi all, I am in the process of wrapping up my degree in Applied Physics with emphasis in electronics. The program has required me to take several courses from the electronic engineering department, which I have thoroughly enjoyed. I have done some planning, and it will take me one extra year...

I am part of a CubeSat team at my school, and one job that I'm currently tasked with is figuring out how to build a transmitting/receiving system that will fit into our satellite. As a result, I am wondering if anyone knows if there are any good, affordable devices that will let me basically...

Let's say I have some simple molecule excited to higher electronic level. Is it possible that it goes back to its ground state by transferring the excitation energy into its vibrational degrees of freedom? I believe it is... what are the selection rules for such a process? TIA

I’m looking at a project to make a electronic tranformer for use within a product, and driving its teathered external devices for a control system. I want to make the output AC voltage configurable between 24VAC and 120VAC. This can easily be done with PWM of the AC signal and a feedback path...

Homework Statement A atom had a threefold degenerate ground level, a non degenerate electronically excited level at 3500 cm^-1(setting the energy orgin as the ground electronic state energy of the atom ) and a threefold degenerate level at 4700 cm^-1 . Calculate the electronic partition...

New to the site, looking for a little help. I'm trying to switch my motorcycle auxillary lights on and off using the flash to pass switch. I have a relay but only stays on when powered. Is there a switch I can put inline, or a switching relay that will work. Thank you

Hello Forum, Some electronic devices specify a certain specific voltage that they need to work properly. Some other devices specify a specific current... Why? Why don't they all specify the voltage or the current? If the current is specified, the voltage will be automatically fixed by...

Hi all, i get shock when i touch any of my electronic equipments (washing machine etc). To avoid shock i need to remove the connection from the socket and then only i can do maintenance and put the connection back to the socket and operate. Obviously i think earthing is the problem before i...

Homework Statement http://img689.imageshack.us/img689/6668/mycircuit.jpg Given a circuit that includes Operational Amplifiers, double-switch - S, for two situations, 1 and 2. Type of switch - DPDT - Double pole double throw. Two diodes and two lightbulbs, L1 and L2. Given: Voltage...

Hello I'm trying to calculate VDS(off) for the buck, boost and inverting converter. All I have is Vin, Vout and duty cycle. Am I correct in thinking VDS(off) is the voltage across the FET? I have no idea how to calculate this. Thanks in advance.

Basic Electronic Gates Question... Homework Statement Demonstrate, via a proper scheme, how can you realize a gate from type NOT, through a single gate from type NAND with two entries? The Attempt at a Solution http://img208.imageshack.us/img208/6093/image201202080001.jpg I got...

I want to know about books for undergraduate engineering level for three subjects; Linear Control Systems, Signal & Systems and Microprocessors. I have Modern Control Engineering by Ogata, S&S by Oppeinhum, Intel Processors by Barry B. Brey and Schaum's Oultines Microprocessors. I heard...

I am 23 and have not been to college. I am currently working as a technician and panel builder for a small company that engineers and builds automation control systems. This is a decent job, but I feel underpaid due to lack of training, and want to step towards a field I'm personally...

I'm thinking mainly within the context of the useful semiconductors here (Si, GaAs, etc.)... What does it mean for an electron to be in the L or X valley instead of the Gamma valley? If Gamma is the k = 0 point, then momentum p = 0. Does that mean being in L or X means all the electrons...

how do you determine the mass of a liquid using an electronic balance ?:S Anyone knows how ?

Hi, thanks for reading my questions. I've been reading and reading and reading and reading and I'm trying to understand the difference between conductors, semiconductors, and insulators at an atomic level. When reading about electricity I often find that metals have a "sea" of "free"...

The TMC channel is showing "Close Encounters of the Third Kind" which brings back the memory of RCAs Capacitance Electronic Disc. Anyone remember these? http://upload.wikimedia.org/wikipedia/en/thumb/e/ed/Ced_cart2.jpg/670px-Ced_cart2.jpg The first "video disk" I ever purchased/watched was:

Evening gents, I am somewhat of a novice with electronics, but nonetheless am working on a temp. controlled computer fan but I've run into some trouble and need some help! My basic layout is a thermistor implemented as a voltage divider (with a resistor of course) which feeds into an amp...

I think this is a super interesting question. I want to know if there is any way that we can protect our important electronic equipments from EMPs? If yes, how? Is the research still in progress and have we achieved any break through s in this area? I only know that it's very costly procedures...

Homework Statement Write all possible terms (n1 j1, n2 j2, …) J for these electronic configurations (considering jj coupling scheme): 1s2 1s2s 1s22s22p 1s22s22p5 The Attempt at a Solution 1s2 I have two electrons in the s sub-shell, since |l-s|<=j<=l+s then j1=1/2 and j2=1/2...

Previously I had been asked the configuration for Fe+ as an ordinary question from Periodic Table. I know Fe2+ and Fe3+ but I have no idea for Fe+ I know the configuration of Fe : [Ar]4s23d6 So I accordingly wrote Fe+ as [Ar]4s13d6 But they say that Fe+ is [Ar]4s03d7 I just want...

What's happen when a molecule or an atom is already in an excited electronic state and is hit from another photon? Example 1: my molecule absorbs a VIS photon (there's a time in which the molecule is an upper electronic state before the re-emission or etc. etc. process) what happen if another...

Homework Statement Construct a circuit that turns on if it the voltage provided is greater than 3 volts, or less than 2. MUST USE THESE CRITERIA: i<100mA, only one PS. Fewer than ten components. Homework Equations None that I know of, but we've covered resistors, caps, inductors, and op amps...

Hello everybody, I am going to face an exam and I am learning Chemistry. I am confused with the term Subshell . Please explain what Subshell is .

hello I am in the final year of my electronics engineering technology program and I've really developed an interest in subjects such as analog and digital signal processing, filters, amplifiers, etc. are there jobs in these areas for people at my level? I've been doing some job searching and...

Hello, why in the normal atomic configuration every layer except the second can contain only up to 8 electrons if for example the level with quantic number 3 contain up to 18 electrons? What relation is there between this two models? Thank you!

Hi everybody I am an electronic engineer and I have a question concerning thermostatic behaviour of an electronic component. I have a printed circuit board (PCB) with electronic chips on it. At room temperature 25°C I measure with the infrared themometer the case temperature of one...

Homework Statement What is the electronic transition of He II when it emits 468.6 nm photon.Homework Equations \frac{1}{\lambda}=4R\left(\frac{1}{m^2}-\frac{1}{n^2}\right)The Attempt at a Solution I know it is a pashen-alpha line from googling but I don't know how to find that from this...

I'm pretty sure that one of the most common electronic switches is the transistor. That being said, I'm not very sure of how you can incorporate one into a circuit. Basically, what I'm asking is, how do I get it to switch when I want it to? How do I use a transistor?

Homework Statement Why are electronic levels present for an atom? What is the need for differentiating energy levels?

Homework Statement x(t) is input into a perfect lowpass filter with frequency response H(ω), having a bandwidth of BHz and a passband gain of 1. For B = (2πT)-1 Hz, calculate the ratio of the output signal energy to the input signal energy. Homework Equations x(t) = Ae-|t|/T The...

Hi!I'm a electronic engineering student. I need some help. hope somebody can give me some hint or help! my final year project title is 'Wireless Temperature Monitoring System using FPGA board'. i really no idea how to start it!

I want to start an electronic company, but I don't know what are all the types of engineering jobs that are capable to build an electronic device (Ex: Cell Phone, Tablet). When I get to University, I'm planning to make some friends who have a degree on it. Also, I need to know what the jobs...

Hello. This is my first post here and I come shamelessly looking for help. I'm an Electronic Engineer and have an idea for an invention but do not know if the type of material that is needed exists, the only one I can think of so far is Bread dough. Anyway, what is needed is something...

I'm trying to google for some but results often lead me to forum questions, theory articles, etc. Basically I'm looking for circuits questions with parallel voltage sources answers, where I am supposed to do the work to find out the solution for the current.

hi, in the Kohn-Sham-Scheme one calculates the electronic density as follows: \rho =2 \sum_{i=1}^{N/2} \phi^*_i \phi_i where the \phi are the Kohn-Sham orbitals. This looks like the density of a closed shell slater determinant. But am I correct, that this way of calculating the denisty is...

So at my school they have Electronic Engineering Technology & Electrical Engineering. However, the EET program is ABET accredited but the EE is not. They have the option of completing the EET degree then taking an additional 36 credits for the EE degree. So I'd have an ABET accredited degree...

I'm trying to understand the concept of a control system in electronics. In a control system, we have a substractor, forward path and feedback path. The forward path is described by a function g ( a gain function ) and the feedback by another function ( gain again ). The input is Xi and the...

guys, any suggestion website for study basic electronic?? thank you~

First off, I'm not sure If the best place to post this would be in the ME or EE section. I'm basically looking for an inexpensive electronically controlled regulator. I want to hook it up to a standard propane tank that you would see on a grill and be able to control the output flow in...

Hi people from Physics forums. This might be an off topic question but, since there are a lot of engineers and physicists here, i'll ask. What are the requirements for an electronics or electrical engineering major, can I be an engineer if I always sucked at math at school?. I've...

Is it just me, but if you multiply anything by 100% you'll end up with the same number? I believe the authors meant to write 100, not 100%. This is from 5 steps to a 5 AP Chem. [PLAIN]http://i.min.us/icDcjc.png

Are photons packets of electronic waves such as this below ----------\/\/\/\/\/\/\/\/\/-------------------------------------\/\/\/\/\/\/\/\/\/\/--------> Imagine the "------------------------->" line is an electronic beam.

As the title, Anyone know any good readable intro book of material science, especially dealing with electronic materials(semiconductors,etc.)? I am a Physics major in sophomore year.. I took Calc 1-3, linear algebra, ODE and some intro EM and modern physics

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Hi, At my house i have in wall stair lights that are 20W halogens (x3). A week or so ago i switched on the 2 way switch from the bottom of the stairs and all three went at the same time. I thought it was the bulbs at first but quickly discovered they were fine. My next thought was the...

Hey, my first post on here, just wanted to ask how to calculate the effect of a motor, and a switching current in the wires supplying the power on the surrounding electronics. The two motors will be supplied a PWM signal of 20Khz frequency, 5amp, 7v2 at 80% duty cycle. This is part of a...

i m making project on knight rider based on bread board using 6 leds, ic -555,4016 a decade counter, 3 variable resistance,and 1 potentiometer. the problem is that i don't know what's the meaning of knight rider, uses, applications .whenever i searched the net i have always found something...

hi everyone, i want to know your reviews on this book. amazon has very good reviews. i am a beginner in electronic. was recommended by someone to get this book. would you recommend some other simple book? and how do you pronounce "Malvino"? my friend has Electronic Circuits, Analysis and...