Electronics Definition and 643 Threads

Its very easy to pull a logic gate or transistor circuit of the internet for example and begin to understand how it represents physical bits, by either having 5V across the circuit or below 3.3V. But I was wondering what are some of the methods for representing qubits from a hardware...

Hello all, perhaps some minds here can help. I am 40 years experienced electronics technician, having specialised in the Audio electronics world in all flavours. I have developed a mixture of materials that can be applied within cable connectors or as an enclosure fitted around electric/audio...

Homework Statement For beta = 100 and assuming ro is very large, what is the DC voltage at the collector? Homework Equations IB = IE(β+1) IC = β*IB The Attempt at a Solution Since IE = 0.5mA, IB = 0.0505 A Then, IC = 5.05 A (which doesn't feel right) VC is the same potential across the 30kΩ...

which one is more physics based? which one is more prestigious?

Homework Statement It appears to me that output load voltages in a Bridge Rectifier circuit with capacitor always seem to be greater than that without a capacitor. I'm aware that the function of the capacitors connected across output in rectifiers is to remove pulsation of the DC output, so...

I come from totally different field. studied previously business management but I was always fascinated by technologies. I find it really difficult to keep up with all the new terms and mathematical equations to follow up. I have to look after each words in every paragraphs. I have searched for...

Anyone know any good power electronics / power systems textbooks?

I'd like to build my own reliable alarm clock, but I don't have any knowledge in electronics and no fancy equipment, only some humble C programming experience. What do I need and what do I need to know to build one myself. Thanks very much.

Mechanical Engineering student in the UK

I am a recent Electrical Engineering grad specializing in Power Systems. Are there any books with DIY projects relating to Power Electronics? I would like to do some projects that I will be able to put on my resume so employers will see that I have hands-on experience.

I have learned the basic electronics and of course Volt ,amp, and ohm relation with the water pipe thing and I am just curious about some things that my prof(s) failed to answer It says that what powers the circuit is actually current, does it mean that voltage and resistance variation is ok as...

I've done my background research on this but i want to double check with others since the last time i did this i blew $30 because i shorted my diode. I got a new one but I'm really nervous about starting it up. These are the two parts...

I'm a bachelor student in Physics and I would like to continue with a MSc in the field of Condensed Matter Physics. I have to choose between some courses at my university and, since I'm not already an expert in Condensed Matter I would like to have a suggestion. If you were in my situation and...

Hello everyone, I'm a sophomore student and I'm a bit confused about deciding my diploma programme. I'm really interested in physics and I don't want to work on a study field which is just full of mechanical things. EE sounds cool because of it's being hard and there are only a few people who...

I would like to know what gear ratio i would need for my electric longboard. The goal is to run the longboard at 30 - 40 km/h at max power. Me and the longboards weight is approximately 65 kg. The brushless motor i am running has an rpm of approximately 18000 rpm (as it is an airplane engine)...

I would like to know what gear ratio i would need for my electric longboard. The goal is to run the longboard at 30 - 40 km/h at max power. Me and the longboards weight is approximately 65 kg. The brushless motor i am running has an rpm of approximately 18000 rpm (as it is an airplane engine)...

Due to the current situation in Venezuela , i decided on studying Two carreers in two different universities a public one and a private one (In Venezuela public universities are best , But they're usually on strike so they delay your studies often and a lot) , What i really love is physics ...

Hello I have taken a language test few days ago and in case I pass it I will get enrolled in an electrical engineering program in Germany. I have no prior knowledge/experience in electronics at all and am thinking about doing something about this before I enroll. What do you think about the...

Hell all, I need a help in understanding the electrical connection of a scintillator, a detector for detecting/counting gamma rays. In the back side of the detector there are three connections, 1. a high voltage supply, 2. to amplifier or preamplifier or single channel or multichannel analyzer...

Say you have a circuit component with impedence Z(\omega). Is it possible combine it in some way to resistors, capacitors, and inductors, so as to shift the phase of the impedance by a constant?

Homework Statement A bypass capacitor increases gain in the mid-band region. Explain how with the figure and small signal model. Assume gm=0.5mS. Homework Equations Rs = 1 k Ohm The Attempt at a Solution With the bypass capacitor, the source would be treated as grounded and the equations...

So, I just had a thought about something I heard from Harry Potter a long time ago (not sure if it was from the films or the books-or both). One of the characters--I think it was Hermione--said something like: "Electronics don't work in Hogwarts." Or something to that effect--that electronic...

Homework Statement A voltage is applied across the capacitor network in the image shown Below (if it loaded I can only see a small panel with IMG on it), which of these individual capacitors has the highest voltage across it Homework Equations...

Hello, Given a simple electric circuit like the one below (taken from Wikipedia) If we were to start from tracking all the forces acting on each individual free electron in the circuit, would it be possible to eventually find all the currents and voltages acting in the circuit? Probably a...

Homework Statement Homework Equations V0=Vsrz/Rs+rz+VzoRs/Rs+rz-ILrzRs/rz+RsThe Attempt at a Solution I formulated 4 cases for voltage inputs of 11 and 13.6 V and 0 to 100 mA. The zener current has to be between 3 and 30mA or 103 and 133mA. How can the current be maintained in thes two...

Homework Statement Find the change in diode voltage if the current changes from 0.1 mA to 10 mA. Ans. 120 mVHomework Equations V2-V1=VTln(I1/I2)The Attempt at a Solution That is all the information given. The only equation I can think to use is the diode voltage/current relationship, but a...

Hey guys! This is my first day on the forum so, hey! I'm a third year electrical engineering student and I'm really having some trouble with Signals and Systems so I want to know what helped other people understand it so that maybe I could try some of their methods. What were your biggest...

Hi, so I salvaged a 220v, 6.5 amp DC permanent magnet motor from an old treadmill and I was having some trouble with it. I believe that AC motors can simply be run from mains power (I have an AC motor from a dryer that I cut the wires from in order to bypass the circuitry and essentially...

Hello everyone, I am a masters student 1/3 of the way through the mechanical engineering program at my school. At some point I have come to the realization that I am really not that mechanically inclined. It seems I have natural tendency towards circuit design and electronics. I really...

Hello, I am very confuse and I need advice. Here it is, I always loved computers and bricollage. During my free time I always look for stuff to bricoller or I stay at my computer all the time ... I'm in first grade in computer graphics and now I realize that what I really want to do is in the...

When I don't have anything to work on I call up my "friends" to come over and play music...lol Cheers, Billy

Hello everybody, I'm a little bit confused about two types of amplitude modulation. We distinguish here: Case I : Amplitude Modulation with suppressed carrier (https://en.wikipedia.org/wiki/Double-sideband_suppressed-carrier_transmission): Case II : Amplitude modulation with carrier: Now...

I have found a couple other threads like this but I am looking for something at a very beginning level. I joined an experimental condensed matter group for the summer at the school where I will be matriculating as a first-year graduate student in the fall. They study various...

Hello, What to do to get good job after Electrical and electronics Engineer?

Okey, I finished high medical school in some very small and poor country in Europe. I loved human anatomy in beginning but then I get bored and stop learning, I didnt loved math or physics becouse I didnt know anything about it. Then three month before finishing school I got interested in EE...

Homework Statement I have recently performed an experiment where the voltage drop and current through a diode were measured. I am wondering why the voltage drop across the diode changes. Theoretically, the voltage drop should stay the same as there is a certain amount of energy required to get...

To start with this is not a numerical but merely a basic concept I fail to understand. I will quote what the CIE book says "Consider a battery of emf 3 V and of internal resistacne 1 ohm. The maximum current that can be drawn from this battery is I=e/r = 3/1=3 A The terminal p.d of the battery...

As a undergrad in Mechanical Engineering, I have a great interest in electronics. I have circuits and Arduino for a hobby, and I'm learning microcontroller programming by myself. When I got into college, I was torn between electrical and mechanical engineering, but ended up choosing the later...

I just got accepted to an electrical and computer engineering course (ECE) and I was wondering if its possible with this degree to get a job in electronic engineering. It seems that the syllabus covers more of electrical engineering than computer, but I'd like to get a job designing hardware...

I really like Mechanical Engineering. I'm now at the second year of my undergrad and I'm now taking some specific courses in engineering - after a whole year of calculus and physics. I think it's the broadest engineering, and I'm an admirer of the aerospace industry and would like to work with...

I have a similar question as others but I felt wrong taking over their threads. The project is an casing for electronics that will be outside all year around. Built out of metal. This means rain, sun, snow. -20c to +35c. The electronics inside works only in 0c-45c and 10%-80% humidity. I want...

I am not a student of Physics just a retired electronics tech who is interested so I am not sure what prefix this should be under. I have some questions about the F=MA equation... 1. If there are two bricks pushed against each other so an equal amount of pressure is applied, I have Mass in...

I am having troubles understanding the working of a bipolar junction transistor(and also its uses as switch, amplifier, oscillator etc.). Can anyone recommend any good book or video explaining it?

can i understand at OR gate with diodes , why o/p not equal the sum of two voltages (5+5=10v) , it's confusing me ?

I'm now at the second year of my MechE course. Until now, I've taken basic classes in physics, calculus, linear algebra and basic computer programming. I choose to undergraduate in Mechanical Engineering because I'm aware that it is a good and broad degree and it's a field that I like also. It...

Hello I am currently a university student studying business. I am going to apply to a program in electronics and information engineering. I liked the program because it is a mix of computer science (algorithms, operating systems, software engineering and computer architecture modules) , IT...

Hi Im studying electronics off the web (btw I am looking for a good online course). My background is in Biochemistry and I've gotten into programming (6+ years) and recently Arduino projects (1 year). I am trying to get a better handle on electricity. As I am reading about Ohms law here...

what is the the Difference between the a H bridge and half bridge power inverter? i mean both do the same job ? what are the pro and contra of using a half/H bridge ? and how would it effect the size of a transformer if I am using one thanks

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...