What is Electronic: Definition and 441 Discussions

Electronic warfare (EW) is any action involving the use of the electromagnetic spectrum (EM spectrum) or directed energy to control the spectrum, attack an enemy, or impede enemy assaults. The purpose of electronic warfare is to deny the opponent the advantage of, and ensure friendly unimpeded access to, the EM spectrum. EW can be applied from air, sea, land, and/or space by manned and unmanned systems, and can target communication, radar, or other assets (military and civilian).

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  1. T

    Electronic circuit breaker design

    I'm building an electronic circuit breaker as follows, I have some questions about the short circuit protection. I tested it in simulation and it trips in about 11 ms. How would I work out the interrupt rating ?, which I read is the maximum short circuit current the breaker can interrupt...
  2. N

    How do you control an Electronic Butterfly Valve with PID

    The butterfly valve I have is controlled by sending voltages to it. It accepts 0-10V and maps a specific voltage to a specific position from completely closed (zero degrees) to completely closed (90 degrees). To clarify/reiterate it is not controlled by a servo motor. I am using this valve to...
  3. learn.steadfast

    I Classical mass vs. relativistic mass for electronic analogy

    I'm working on semiconductor physics and cyclotrons. There's an article that I am trying to understand, but am having difficulties matching with experiment. I asked a question on an electronics site, but apparently the physics is too advanced. The relativity article which sparked my interest...
  4. P

    A Does an increase in gain cause peaks to shift right?

    In a spectrum from an MCA (that is hooked up to a scintillator and PMT), does an increase in amplifier gain cause the peak to shift towards higher channels? I have a source and its really weak so while calibrating my detector, I had to turn the gain up way high to see a peak, but I'd preferably...
  5. J

    Magazines wanted - EDN, Electronic Design, etc

    I would like to have some electronics magazines from about 2001 to present. When I was an engineer in the electronics industry I received EDN, Electronics Design, and Electronic Component News. Any of those would work. A few from each year would be fine. Let me know what you have and terms...
  6. Q

    Electronic card for trigger crossing timestamp

    Hello everyone, I work on a project of measurement of phase shift on a single phase modulated signal of which I must detect the zero or trigger crossing in order to be able to estimate the phase by first calculating the difference of the times between rising or falling edges then calculate the...
  7. J

    Misc. Custom building a CNC mill for aluminum

    So as a quick background I've made a 3-d printer (I know a monkey could assemble one of those DIY prusas) and want to step up my game a little bit. I came to the realization that some people have made/sold DIY milling kits, but most of them are for plastics or wood. I would like to make a...
  8. M

    Electronic Circuit with 2 diodes

    Homework Statement I have to find Vo in every diode state possible. We know diode Vf = 0.7 Homework Equations Va-Vc < 0.7 = diode OFF Va-VC > 0.7 = diode ON The Attempt at a Solution State 1: if D1 OFF and D2 OFF Vo will be equal to Vi State 2: if D1 OFF and D2 ON Vo will be equal to...
  9. Eureka99

    Electronic transition in organic compounds

    Hello everybody :) I have a problem understanding the different types of pi -> pi * transition of organic compounds. I can't understand what's the difference between K-band, B- band, and E-bands, and I cannot find any explanation on the internet. Also I don't understand why benzene has two E...
  10. D

    Electronics - Have I found the transient current correctly?

    Homework Statement A step voltage of 120v is applied to a series CR circuit. C = (4x10^(-6))F R = (20x10^(3))Ω When the capacitor is fully charged the supply voltage is removed. Using KVL and Laplace transforms obtain an equation for the transient circuit current, given when t = 0, the voltage...
  11. O

    How to solve the differential equation for driven series RLC circuit?

    Homework Statement It is the driven series RLC circuit. It is given in the following images. It is from the section 12.3 in this note. Homework Equations The differential equation, as given by 12.3.3, is ##L \frac{d^2 Q}{d t^2} + R \frac{d Q}{d t} + \frac{Q}{C} = V_0 \sin{(\omega t)}##...
  12. M

    Setting up a circuit to drive a Laser Diode

    Hello fellow physics friends (alliteration: always a strong opener). I am writing today because I find myself struggling to complete something which ostensibly doesn't seem that difficult to the average physics undergrad working in a lab. However, electronics and circuits are definitely a...
  13. I

    Paper about application of ADuCM350

    Does anyone have papers or journals describing the application of ADuCM350 ? Thanks for your information.
  14. Vaughan

    Post sound amplification electronic crossover/devider

    Hi Guys, Im new here and don't know much about electronics so please bare with me as I try to explain what I would like to know. If you have a classic design speaker it has a passive crossover inside consisting of mainly capacitors and inductors changing the frequency (or limiting) to send low...
  15. F

    A question regarding electronic negative feedback

    I have a confusion understanding one of the basic assumption used for operational amplifiers which is Vin = 0 or difference of inputs = 0. Take for example an ideal amplifier with inputs V+ and V- V+ = 1 V- = 0.5 * Vout Supply Voltage = +-9 Vin = V+ - V- At start V+ = 1 and V- = 0, providing us...
  16. P

    Checking Solutions to Electronic Questions Before Exam

    at firs i apologize if this is not the place for this but really i have exam after few hours and i need chech my solutions . i have some essay questions and i want to check my ideas 1) can we use the diode as switch instead of transistor ?? 2)design an op amp to amplify the dc signal 3)how to...
  17. Raazi

    Automotive Electronic Torque Managment in an EV

    Hi, I am a beginner in terms of mechanics and am an electrical engineer so I apologize in advance for asking what may be trivial questions. I am attempting to create a prototype design for an electric vehicle (truck) in which I am mimicking the Telsa drive train configuration but I am stumped...
  18. G

    A Paschen notation for electronic states of Argon atom

    Hello. I think excited states of Argon atom is described by j,l coupling written as (2s+1)[K]J. However, when I read some papers describing cross section data for Argon atom, data are quoted with strange notation, Paschen notation. I tried to study the Paschen notation and found that its form...
  19. M

    Electronic Noise General Questions - Laboratory Setting

    Hello all, I'm an undergraduate at a large research university in Massachusetts working in a lab where my group contributes to the Muon g-2 experiment at Fermilab in chicago. Essentially what I'm working on is optimizing an optical rotation (Faraday) magnetometer system for use in magnetic...
  20. Planobilly

    How do I deal with a failed electronic project?

    Hi, My last amp design/build has failed to operate as planned. There are several perplexing issues I do not know the cause of. I started the amp up and it will play and has all the voltages I expected within a few volts. Issues 1. Serious amount of 60hz hum. 2. Channel two gain and volume...
  21. M

    RMS value secondary voltage electronic halogen transformer

    I am trying to derive a scaling factor for an analog voltmeter for the purpose of measuring the secondary voltage of an electronic halogen transformer (EHT). http://www.ledbenchmark.com/faq/Transformers-Output-and-Compatibility.html The output voltage of these things is a "high frequency"...
  22. R

    Testing Electronic Components with an Oscilloscope and Mössbauer Source

    Dear All, how to know whether electronic components such as spectroscopy amplifier (canberra 1413 or 2010), single channel analyzer (from ortec) and NaI Scintillator counter with its basis are working good. Are there any testing methods using a oscilloscope. I have a Mössbauer radioactive...
  23. G

    MHB Number Theory for Electronic Signal Frequency Synthesis

    I am new to this forum. I am an electrical engineer designing frequency synthesizers for electronic test and measurement equipment. I have a design problem and I think that number theory could help me solve it. I'm not a mathematician, so I will state the problem the best I can. Definitions...
  24. T

    Electrodes liquid contact electromagnetic flow meter?

    Hello, I'm interested in building a small non-invasive battery powered device that wraps around a pressured 1/2" pipe for measuring potable water. From https://en.wikipedia.org/wiki/Magnetic_flow_meter and watching youtube videos, it seems they all use electrodes which contact the liquid...
  25. MeaningfromForm

    Super small electronic variable resistor -- Exists?

    Hi I couldn't find of these exist anywhere. Is there a component that is a variable resistor that adjusts based solely on receiving an up/down signal? And maintains its state on powerdown? I don't want this solution to involve any type of software, just a hardware solution. Looking for...
  26. DarkBabylon

    Can a MOSFET be used to replace a mechanical potentiometer in a PWM circuit?

    Hello, I've been wanted to make a PWM module for a DC motor for a micro controller powered quadcopter. Now it might be easier to just punch the code for PWM, however I would like a voltage of more than 5 volts on the motor. That wouldn't be a problem to adjust the components and source. The...
  27. TranscedentKid

    Medical What is the specialty called for electronic implant surgery?

    What does this fall under?
  28. Buggsy GC

    Why does AC have less copper loss than DC

    Hi there everyone, I'm doing some study on electronics and the section on the advantages of A/C over DC mentioned that AC has less copper loss (I^2 x R), But to me this seems contradictory to the skin effect. Could someone please tell me why AC has less copper loss.
  29. Boubacar

    Programs Electronics: Can I Improve Math Skills?

    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...
  30. T

    Electronic NOT gate chip question

    Hi, Can current flow both ways through a NOT gate, or is the diagram I saw, much like the picture I drew here, just drawn the wrong way around? Anyway, say it was correct, so what does this mean? Because the chip itself (the not gate chip Vcc = 5V and Gnd) takes 5V between it and the chip...
  31. R

    What device to read electronic books?

    Hello. I'm studying physics for two years now and I have never bought a book [thanks to professor's notes, free and "free" books on the web]. I got tired of using the laptop, so I need something to read ebooks (pdf and djvu mainly and also epub). Is it better for this purpose an ebook reader or...
  32. H

    A Incandescence and electronic excitation

    As far as I experienced, incandescence happens in a wide variety of materials no matter what a substance (conductor, insulator and so on) is. Does this effect is related to the electronic excitation? Could anyone please explain the reason of this effect?
  33. Weightofananvil

    Electronic Design component selection intuition

    Hey, So I've taken a course learning theory to mosfets, Jfets, transistors etc. Recently we did an amplifier project with a summing component as a final project. I chose which component pretty randomly. I'm a little misled as to which component is better in certain circumstances. BJT's are...
  34. M

    Electronic Spec - Terms generated by config of (e1g)2(e2u)2

    Homework Statement What terms are generated by the configuration (e1g)2(e2u)2 in D6h symmetry? Homework Equations configuration (χd)2 gives terms 1(symmetric product) + 3(antisymmetric product) where χ=symmetry of an orbital and d = degenerate (e1g)x(e1g) = A1g + [A2g] + E2g (e2u)x(e2u) =...
  35. C

    Programs Can I go into electronic engineering with an ECE degree?

    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...
  36. striogi

    Radio and other electronic signals in space?

    Not sure if this is the right section or if this might be better off over at Cosmology... or...? So this is actually around a story concept I had, and while I would like to get the science as right as possible, I expect a certain amount of hand-waving to get past some of the difficult and...
  37. S

    Prove That Relationship Given is True for Transmission Lines Homework

    Homework Statement I am having problems with the second part of the question - proving that the relationship given is true. Homework Equations See question. The Attempt at a Solution Firstly, consider a single pair of transmission lines with characteristic impedances ##Z_{1}## and ##Z_{2}##...
  38. Docscientist

    Electronic configuration of transition elements

    I know about quantum numbers and how we do it as 1s,2s,2p,3s,3p,3d etc...but how do I find the number of valence electrons by doing this ? I watched so many videos about this topic and I still don't get it.Possibly because I am trying to learn the portions before even it is taught at school.Can...
  39. larrybud

    Please help me identify this electronic component in Camera

    I have a Casio FH-20 camera. I tried looking for a schematic to no avail. Everything in the camera works fine except that it will no longer remember the date/time when the batteries are removed. I figured there was a lithium battery in the camera that went dead (it's about 8 years old, I...
  40. Kilo Vectors

    Engineering Electronic and Information engineering

    Hello..What do you think of the course Electronic and Information engineering course? Is it a good course for industry? I don't know much about this field. I would like to do master in computer science/engineering or electrical related fields. Is it a good degree? These are the modules: -...
  41. T

    Electronic component type (what would do this?)

    I was going to make a modem uninteruptable power supply, and I was thinking (possibly over complicated) that I could have a relay with the solenoid that has a potential over the battery bank and the power supply, so there would be near zero volts potential when the power supply was on (and...
  42. Z

    De facto standard file format for electronic circuits

    What's the most common way to store electronic circuits in digital form ? What is the ".pdf document" equivalent for the electronic world ?
  43. K

    Electronic materials -using the Kronig-Penney model

    Hey guys I need your helps. Show you as pictures.
  44. H

    Electronic Structure of Ribbons

    I know how to calculate band structure of two dimensionaI sheets by tight binding. I am looking for a reference to learn thoroughly how to calculate band structure of 2d-ribbons (Graphene nanoribbon, Silicene nanoribbon,...) using tight binding method. Could anyone please help me?
  45. C

    Relation between electronic band structure and Fermi energy

    I have some qualitative questions about the relation between band structure, density of states, and Fermi energy (or Fermi level). 1) Say you have a given electronic band structure (energy as a function of k) obtained by any method. How do you relate this to the Fermi energy (or Fermi level) ...
  46. nar5i

    Can Piezoelectric Plates Effectively Charge a Phone?

    I am doing my wrong project from school. Its basically a science fair but only for the students in the class. I came up with the idea to use piezoelectric plates to charge a capacitor that then charges one of those portable po charge a phone. I know I'm not the first one do this, but I do want...
  47. D

    Need help in deciding what to research for physics project

    Hello enlighted people of this forum. I'm an undergraduate from a university in Colombia, my subject of study is software engineering but I have a class which is named "Physics 2", this class introduces the subjects of simple harmonic motion(pendulum, sound waves, etc), electric fields, Gauss's...
  48. K

    Understanding KVL Loop in BJT Biasing and Calculating Ve: A Guide

    Please help how Ve is calculated what i think is that it should be: -Ve=-Vee+IeRe; How Ve is taken positive please someone draw equivalent circuit for same
  49. mooncrater

    Reliability of many valued electronic signals.

    Homework Statement In this book of mine , I saw this statement,"The digital-system designer is restricted to the use of binary signals because of the lower reliabilty of many-valued electronic circuits." . Why is so? How can we say that the many-valued electronic circuits are not reliable...
  50. zoobyshoe

    The Difference Between "Electric" and "Electronic."

    At some point in the history of technology something happened whereby some devices that operate by electricity became known as "electronic" devices while others remained merely "electric" devices. The latter are obviously simpler, but it's not clear to me where the cut off between the two should...
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