Electronics Definition and 631 Threads

I just went out to my car to retrieve my laptop. My car is at about 1 degree C, my house is at about 20 degrees C. I soon noticed condensation forming on the screen and it occurred to me that condensation was probably forming inside as well on the electrical components. The combination of...

Hi, I am struggling to understand the maths in the text shown below. (1) How does: r(t) = Acos(wt)+Bsin(wt) become; sqrt((A^2)+(B^2))cos(wt - arctan(B/A))? (2) He states that we can represent the input as a phasor and in one of three ways but doesn't say which one. (3) He then focus on the...

Hello, everybody First some context: I live in Argentina and I'm a few months away from starting my first year of college. In here they make the distinction between Electrical Engineering and Electronics Engineering (and then there's also Informatics Engineering which I think is the equivalent...

Hello all I'm looking for some cool Christmas gift ideas that I can build for friends and family at a fairly cheap price (~50-70$ assuming I've already got basic components/hardware) using electronics/microcontrollers. Most DIY sites I see after a quick Google are non-electronics oriented, so I...

hello, i have a question regarding the way we represent information on circuit diagrams. The first is to do with representing output voltages: is V out always simply representing the voltage of whatever lies between/trapped between those two horizontal lines? Also, i see a lot of diagrams...

how can I control 2-way motor, to be specific I want to change direction after few rpm, is it possible to do it without arduino

Hi Just wondering if someone could help me! I need to know how much torque and RPM a motor will output for a given load (0.75kg), the only information I've been given is how the RPM and current vary with time for 4 different flywheels of masses 118g 166g 208g and 337g! the dyno test datasheet...

I need help in making my project using Bipolar junction transistor. I'm Engineering student (Ist year). Can someone here suggest me a Funtastic project that i can make easily and impress my teachers as well using BJT transistor. I have rea the Cascade, cascode and Darlington technique to amplify...

"An internal study at Lahey Electronics,a large software development company,revealed the mean time for an internal email message to arrive at its destination was two seconds. Further, the distribution of the arrival times followed a Poisson distribution. a.What is the probability a message...

First let me just I'm a total newbie to electronics, but I would like to progressively learn how computers work by building the little components with the small parts, and then work up to the ICs once I understand how to make rudimentary versions. I'm trying to make a 1-bit multiplexer out of...

I've been reading Code: The Hidden Langauge of Computer Hardware and Software by Charles Petzold, and he described the 5 basic gates (AND, OR, NAND, NOR, & XOR) with extreme clarity. In the chapter about adding machines, he described that we needed a gate that relays only when it receives a 0...

Hey guys. I'm not supposed to ask about homework stuff in this forums but I'll give it a shot cause I'm really really lost in this. Also, I won't be so specific. I'm taking the power electronics course from college and I'm supposed to give a presentation on Opto triacs. I just don't know where...

Hello All, From my A'Level knowledge of Physics, an electron is both a particle and a wave but not both at the same time. I would like to know when does an electron behave as a wave (if it does) in a transistor? Thanks Yashtir Gopee

Good evening people. Recently I started taking the "electric network analysis" course in my school. We already saw the mesh analysis method for solving circuits. Now we are seeing the node analysis method. I understand that the first step for this method is finding the number of nodes (and one...

Hello Everyone, I posted in Physics Forums back in 2011 trying to figure out what undergraduate Major to choose based off my interests. I had received very positive feedback then and am seeking more advice now that I am further along in my career. I am a recent undergrad graduate with a major...

Hi, I have been interested in electronics and computer hardware for some time now. I'm will be going to school for engineering/programming; however, until then, I would like to engage in a few side projects to gain some concrete experiences within this domain. Specifically, I kind of want to get...

<< Mentor Note -- ZIP files are a security risk, and the file has been deleted. Please post the individual files instead. Thanks >>[/color] I saw a post from 2009 of someone who needed a mixer component to play with. So for learning purposes I zipped a symbol, schematic, and .sub file...

I guess I am interested in the various electronic means of finding out how a robotic joint relays positional information back to it's control unit.

Our teacher derived an expression for electric field due to thin sheet using gauss law which was sigma/2*epsilon naught which was independent of r but dies that mean the field will be same even if r is 10000km but field is also equal to kq/r^2

hello everyone. me and my mates as some fun over the school holidays are having a competition to see who can throw 1Kg the highest without the use of electronics due to an unfair advantage to those more well off etc. my first idea was a rail gun but as that requires electronics it is unable to...

Homework Statement Design a filter that will pass frequencies greater than 20 Hz and set the -3dB point at 10 Hz. Assume zero source impedance and 10k load impedance. Homework Equations ##f=\frac{1}{2\pi RC}## which is the equation used to determine the 3 dB frequency of an RC filter. The...

Homework Statement http://i.gyazo.com/c6b73ca3a53b7d36bce59a0aa5009d27.png Homework Equations Kirchhoff's Current and Voltage Laws, Resistors in parallel and in Series. The Attempt at a Solution The main thing confusing me is the diagonal 6 Ohms, not too sure what it is parallel too and how...

So I have to choose between mechanical, Electronics and Electrical engineering. I want a job which has a lot of research to do rather than just designing or improving a product, as of now I think electronics is better suited for me, but I am having second thoughts. I am going crazy over this...

As I want to do higher studies in physics ( and unable to get a good Bsc (hons.) physics program) which Engineering should I choose Mechanical or Electronics and communications? From what I hear ECE guys end up doing software jobs after their graduation and Mech has better chance of doing...

i am currently studyin fo r my barchelor's degree in meteorology and climate science ...but i really want to pursue electrical engineering for my grad schools...is that possible?...if not what wld be my best option for any ms study with the degree am currently pursuing ..considering job...

So i have been selected for Higher Studies but very Confused between Civil engineering and Electrical Engineering Electronics... I have been offered Civil Engineering from NUST and EE Electronics FROM GIK... can u please advice me? i like Both fields. please tell me which has more requirement...

Homework Statement Hi all, I have a question about using peltier cells for both cooling and reading temperature in the same moment. I need to cool down a couple of Integrated Circuits so I'll put put a 20mmx20mm peltier cell over them but I cannot read the cold side of the cell because it's...

Hello everyone. After googling my eyes out, the only hits I get are about people wondering how much to charge their cell phones. I'm looking for a more academic view point on this. My question is this... Cell Phones, like any device require power. I'd like to find out how many amps or miliamps...

Hello Reader, I am looking into electronics and how the physically work. I'm less interested in the programing side of them and more interested in how to build them. Eventually I would like to be able to build computers and program them but that is a long way off. Does anyone have any...

Hi folks, I've designed this amplifier, it uses an Ne5532p op-amp for the voltage amplification and feedback in the non-inverting configuration. The output stage is handled by two Darlington transistors, TIP 121 and TIP 126, these are hopefully biased by TIP 117 and TIP 112. I was hoping that...

Hi guys, I recently finished my Physics undergraduate degree, and will be starting my first job in September. My employers have asked me to improve my knowledge of electronics before I begin work. I would like to improve my ability to analyse and understand circuits, and also learn more about...

Halo! I hope to graduate from college of engineering where I study Bachelor of science Electronics and Telecommunications engineering before graduating I required to do a project on my field Help me with a title of which best project I can do. Thank you in advance

Hello I am designing the cooling system for cabinet with all the electronic components inside. I am using 2 axial fan with louvers at one end and other end has exhaust louvers. Currently i want to optimize the air flow/cfm inside the cabinet so that i can maintain overall temperature under...

Hello everyone, I am from India and studying Electronics Engineering. But i don't have much idea about career options available for an Electronics engineer. So can anybody give me guideline about What are career options for an Electronics Engineer? What kind of jobs are available in the...

I designed a circuit for my take-home Electronics final (for which we can use Google etc.) but I can't figure out how to test it in an electronics simulator. I'm trying to use Partsim and don't know what to do about outputs/inputs. It's a BJT amplifier. The output is supposed to be on the...

Why only semiconductor devices in Power electronic circuits will operate as switches?

Hi all, I am starting an internship with Lockheed Martin on Tuesday, May 26. I have just been notified of my duties, which will involve resolving issues with hydrophones/transducers. I am looking for recommendations of good textbooks that I could refer to during this internship. I am a rising...

I got to know about robotics 5-6 years ago after watching a program in the Discovery network. I even joined robotics classes and i found it fascinating. (They gave me LEGO mindstorm kits). I also learned C programming and i know python as well.(my friend told me that its important to know C...

I am a mech engineer. Basically i want to start learning electronic circuits with interactive animation like how flip flop works etc. Can suggest a cd to purchase.

Hello. Let's say there is a instrument needed to be EM wave-shielded in High voltage discharge lab. Building Faraday cage becomes necessary and the instrument is moved to inside the cage. The cage is grounded to lab ground and the frame ground of the instrument (it is also signal ground for the...

My observation is to verify self inductance formula by measuring the resonant frequencies of different coils in an LC circuit.For this, I am asked to use this formula by my mentor : L = 1/(4π^2 . f^2 . C) Here, f = different resonant frequencies, C = capacitance of the capacitor in the LC...

I am learning network theorem,my syllabus includes application of kcl,kvl,thevenin and norton theorem,superposition theorem,maximum power transfer I studied it from malvino,its quite good! But lack of solved problems! Actually I am finding difficulty while solving networks with double voltage...

Hi I have a project to were I would like to melt ice from several feet away. Is there an electromagnetic transducer that I can operate to melt ice? What resonate frequency would I need to use? Any ideas? Thanks

I am writing a paper on Classes A and B push-pull amplifiers and was wondering if anyone would be willing to share some valuable insight into this type of circuit, i.e. advantages, disadvantages, when and where they can be used, etc.. Also, I have been doing a lot of my own research into this...

Has anyone seen the newest edition? Is it much better than the 2nd? I own the 2nd but am interested in the newer one if it's better.

Hello, my name is Diana and I'm studying Electrical and Electronics Engineering. I really love and enjoy Physics so much, and I was planning to study Physics after graduating from Electrical and Electronics Engineering. This is my first semester by the way. The reason I didn't apply for Physics...

I am from Electronics and Telecom Engineer.Most of us get placement in software industry which is not our core field. My straight forward question is there any scope for an Electronics and Telecom Engineer? If yes,what are the options or career path so that I can remain stick to My core branch...

Homework Statement There is a circuit diagram which I can't post atm and don't think it's relevant to my question. Also: R1 =R2=10k and C=.1μF And: Find V(t) Homework Equations We're given the equation V(t)=1/RC ∫t-∞ Vi(t)e-(t-τ)/RCdτ My problem is I don't recall what tau is here "τ" and...

Do you have a home lab? What does your lab consist of? My lab mostly consists of electronics tools like an oscilloscope, function generator, various power supplies, meters, and so forth.

Look, I found that there exist two kind of electric current: conventional flow and electron flow. I have read that in every situation I have to use the conventional flow, however I'm going to work with electric circuits using copper wires. In solids, only negatively charged particles (electrons)...