Electronic Definition and 442 Threads

Information (dielectric constant, loss tangent, temperature ratings, etc.) about all insulating materials of interest to EE's from resins to wire insulations to circuit board materials. Condition is very good, with no markings except for a name stamp on the flyleaf. The only condition issue is...

Hi guys, I am trying to make sense of an electronic component, but have found nothing on the internet. Does anyone know what this component with the label " R22CC1" is? The half cylinder shaped part ist rotating. Thanks a lot in advance. Bests Andy

I don't really understand this electronic configuration of a thing. Suppose I want show the electronic configuration of calcium, how do I show it? Is like this 2, 8, 8, 2 or $$1s^22s^22p^63s^23p^64s^2$$

I am thinking of "attending" a virtual meetings that has virtual posters. It seems kind of weird, but could be useful and convenient if it works well. And it free! I have not done this before and would like to hear about other peoples experiences: 1) I am wondering about how the posters work...

See the attached figure. I used 220uF with buzzer and also tried 10uF capacitor but buzzer isn't loud enough. I don't have any 3.3pf capacitor. I used 1.1 pF instead. I also tried changing the resistance of potentiometer but still buzzer isn't sound loud enough.

I am not being able to understand what is the electronic dispersion exactly, I have came across it in few papers and I haven't find any resource that explained it clearly and simply. I've came across 'the electronic dispersion is linear' and 'electronic dispersion is parabolic' and some graphs...

##K = \frac{N}{m} = \frac{3eV}{bondlength^2} = \frac{4.806*10^-19 J}{(2*10^-10)^2} = 12.015## Then I know that ##H = \frac{1}{2}mωx^2 ## where ## k = mω^2 ## and also ##H=ħω(n+\frac{1}{2}) ## Therefore, ## \frac{1}{2}kx^2 = ħω(n+\frac{1}{2})## Solving for n, ## n = \frac{1/2kx^2}{ħω} -...

High-power electronic subassemblies – housing CPU or power-conversion semiconductors, for instance – require significant thermal dissipation to keep their chip-junction temperatures at or below their maximum operating temperature. (As a rule-of-thumb, every 10oC increase in junction temperature...

According to this Wikipedia entry: https://en.wikipedia.org/wiki/Electronic_band_structure the discrete energy levels of an isolated atom split into N levels in a macroscopic crystalline lattice (N being the number of atoms in the lattice) forming essentially continuous bands from the discrete...

Hello, I'm just open to new ideas about Electronics. For some reason or another, I loved this community. I want to participate in discussions about Electronics but I want something constructive, new ideas. I'm located in Europe so it would also nice to meet with other members here and share...

I would like to exercise the formulations in the book. I have read Gravitation and many others but I need to do more exercises. I get very bogged down in writing out the symbols. Are there electronic solutions for writing and exercising these equations? I have used Mathcad to perform...

All I need is for someone to look at my schematic and tell me if this circuit will work. Thanks.

Hi I purchased a vacuum container on amazon, the type with the glass and rubber lid. I didn't want to spend a bunch of money to buy an electronic air vacuum so I just bought a hand pump instead. Only problem is the hand pump doesn't seem to create a vacuum, even though I verified the hand pump...

I have a difficult to articulate question about digital microscopes. I was reminded by my post in the STEM toys thread when I mentioned the Eyeclops. How does one define what strength something is magnified at when you can cast the live image onto monitors of various sizes? An image magnified...

E=hf

https://www.physicsforums.com/attachments/281345

Abstract: The electronic Schrödinger equation can only be solved analytically for the hydrogen atom, and the numerically exact full configuration-interaction method is exponentially expensive in the number of electrons. Quantum Monte Carlo methods are a possible way out: they scale well for...

How did you find PF?: Google Search 1) Have created YouTube video clips about electronics, cochlear implants, and Robert's Rules of Order => https://NDAcademy.FoxPing.com/. The electronics covers topics industry needs (zero theory). Starts at middle school grade level, ends at college level...

In the solid state physics by Ashcroft & Mermin, in chapter 9 there is a paragraph that I would be grateful if anyone could explain it more for me. The paragraph is: As it said in chapter 12 it will be seen. I read chapter 12 but unfortunately I can't understand what exactly it want to say...

How would you explain, on a basic level, why only one photon (as opposed to two, three...) is emitted when an electron in an atom changes its energy level? This is for students with only introductory Physics background.

I'm new to this type of thing(entering the third year of electrical engineering) and could use some advice. I am working for my school and have assembled some components(Single Board Computers, a buck converter, Linear Servo, etc) for our design. We want to test the design in a three weeks. I...

I was wondering if someone has any experience of using a "large-scale" ELN system for experimental physics (mainly)? That is, ELNs that are used throughout an organisation to ensure compliance, proper handover etc Where I work there is now a discussion about buying a site-wide ELN to replace...

I don’t know how to sketch so I really need help

Is it ##(n-1)d^{1->10}ns^2 \ or \ (n-1)d^{1->10}ns^{0->2}## ? My textbook says it is the latter. But I feel like it should be the former. Moreover, period 6 and 7 has the presence of f-orbitals. So adding## (n-2)f^{0->14}## would make it more general. Isn't it? And also what about the f-block...

I don't really understand or see the correct way to approach this. Letting the current in question be ##i_x## (as shown in Fig. 1), and the unknown (changing) resistance be $R_x$, I can write: ##-V_s + R_s i_s + i_x R_x = 0##, and ##R_p i_p = i_x R_x##. Hence we can also write ##-V_s + R_s i_s...

If I am given an H bridge circuit such as that below: How would I go on analyzing it? I would personally replace all of the transistors by their circuit models but then what would I do with the motor? Do I replace the motor with it's load resistance or is there more to it? I guess motors are...

Hello everyone, I am in an upper division undergraduate electronics and circuits class right now and the textbook that were using (Eggleston: basic electronics for scientists and engineers) is not resonating with me. I was wondering if anyone had recommendations for a textbook that explains...

Hello, Is it possible to read the original, ground-breaking, pioneering papers of Quantum Mechanics - the papers by Max Planck, Niels Bohr, Albert Einstein, Louis De Brogile et al? In the form of electronic copy or a pdf format? I suppose the original 'copyrights' have expired and they should...

hello, I am new here, nice to meet you here. I want to learn knowledge related to electronic components, can you recommend me some books or online website for me to study? thanks in advance

I've been given this question for my TMA2, I've tried looking at the learning material but it gives no information on how to calculate the gap? Does anyone have a formula for this? Or can someone point me in the right direction? Thanks

why an increase of fermi pockets leads to a reduction of electronic correlations

how can I determinate the electronic structure of a multiband system? for example in the case of the superconductor BaFe2As2 , the electronic properties are as known dominated by 5 Fe d states at the fermi energy, so 5 bands cross the Fermi level and form 5 Fermi surface sheets (if we consider...

Please explain the difference between mass deficit and nuclear binding energy and is there a relationship? Thanks Geo

Problem Statement: While KLM points remain connected, the connection between points XY is removed. Calculate the potential difference between points XY in this situation. Relevant Equations: V=IR, KVL

Please refer to the simplified circuit in the attached figure. The overall goal is to control the current through sense resistor R1 by adjusting a reference voltage V2, thus creating an electronic load where the power is dissipated in Q1. All load current is returned locally in the isolated loop...

Hello everyone, I was wondering which field of study teaches how to make electronic components. For example, I would like to learn how to make resistors, caps, led, transistors... I have more or less of the theory, such as what the Dirac gaps are, if we talk about semiconductor... But what I...

How should I start learning how to Build an electronic oscillator? Any voltage will do. It drives a led. Target frequency I 1000 hertz.

I am working in telecom company and they told me that they installed new system and then they told me the equipment will be EOS (End of Service) after 5 years. I was wondering that how the electronics equipment's age is calculated. If I strictly categorize my questions and explain the confusion...

Hello all. I'm a guy with big interest into electronics. I have multiple ideas that want to realize in real devices but yet I have only my introduction course in electronics I studied in college as a background. As a first step I want to make an easy electronic device but I have no idea where...

I've plotted out the trajectory of an imaginary electron in 3D; next I represent it's points with the matrix A(x1 y1 z1) "throughout it's orbit": ( -1/2 -1 1 ( -2 -1.5 2 (-1/2 2 3...

Homework Statement Hello, I have got input from comparator op amp which gives HIGH or LOW. Based upon that, one of two LEDs needs to light up. Two LEDs should't be ON at the same time. Calculations are not needed, only the schematics. Homework Equations None The Attempt at a Solution I am not...

Hello, I find a expression to calculate vertical electronic affinity I wouled like to know the utility of the latter ? what is the difference between adiabatic and vertical electronic affinity? Thank you

Hi, I would like to implement voltage regulator based on microcontroller + triac. I am able to calculate source RMS voltage by sampling signal using ADC, but don't know how to calculate triac angle to set desired RMS voltage. For example i have 250v source RMS voltage and i need to calculate...

Homework Statement They give the following circuit. Each capacitor is 50*10^-6 [F], the Resistors are 2[Ω], and the Voltage is 5[V]. In the first step the close only the 1st switch and let the capacitor to be charged. I've found that the charge is 2.5*10^-6 [C]. (using the equation Q = V*C)...

Homework Statement FIGURE 1 shows the block diagram of a superhetrodyne radio receiver. In a test a 20 μV signal was fed from the aerial into the first stage of the receiver, a radio frequency amplifier. This signal is the passed through several stages of the receiver to eventually appear at...

I have a homework question that asks me to draw up a truth table for the attached circuit. As you can see I did this (I think correctly). There is also an attached question asking what function the circuit serves - I am not sure what function this is Any pointers appreciated.

I Had been given an assignment on electronic properties of materials in reduced dimension as mentioned above so I have been given another option to choose whether it to be a theoretical approach or experimental approach which one should I choose.

Homework Statement The exercise asks many questions about the following E(k) diagram, but I'm more interested in understanding some basic things about it, from which I'm sure i'll be able to find the answers I'm requested. 1) What do the bands actually correspond to? Is the lowest band...

In NP problems we can cheaply (polynomial time) test if a given input is satisfying, but the difficulty is that there is an exponential number of possible inputs - the question is if e.g. there is a satisfying input. Imagine there is a simple hardware implementation of verifier (e.g. in form of...

1. The problem statement, all variables, and given/known data After thinking over your beloved but erratic instructor’s lectures on the Bohr model of the atom, you come to the sad but inevitable conclusion that he has, yet again, lied to you. You have been taught that to make an electronic...