Design Definition and 1000 Threads

  1. H

    Engineering Design a circuit w/1 Ohm impedance

    Homework Statement Design a suitable combination of resistors, capacitors, and/or inductors which has an equivalent impedance at ω=100 rad/s of 1Ω using at least one inductor. Homework Equations Zeq=ZR+ZL+ZC ZR=R ZL=jωL ZC=-j/ωC The Attempt at a Solution I really am not sure how to start. I...
  2. I

    How can I design of a Corner Reflector antenna?

    Hello every body! Last weak I decided to make a corner reflector antenna for reciving TV signal.Now I need design and construction theory about it with total idea.I also need circuit diagram.Please share with me if anybody knows. sorry for my bad English. Thanks
  3. A

    Introduction to digital logic design Video Lectures

    Hi, Can anybody recommend me a good video lecture series on Introduction to digital logic design? I want to watch these videos before going to class.
  4. T

    Software/database for simple crystal structure design?

    Hello, Does anyone know any (free) software for generating simple crystal structures like forms of SiO2 or TiO2? It must be a really common problem. My current strategy is to search the web for hours until I get lucky. There are online databases which have really complicated structures from...
  5. A

    Design a Stirling Engine: Gamma vs. Beta

    I am thinking of building a Stirling engine and am debating between a gamma type and beta type. Any advice on which type I should go for, and what the advantages/disadvantages to each is? Thanks
  6. G

    What are the best software options for pipe work design?

    What are some usefull softwares to use for pipe work design? Are there any softwares where you can select material? Can design to specific standards?
  7. Saladsamurai

    References for Design Engineers (Must Haves)

    Hello all, I was wondering what kind of references design engineers like to have handy? So far, I have Shigley's Mechanical Engineering Design and Roark's Formulas for Stress and Strain What other references do you like to have on your bookshelf? Thanks :smile:
  8. W

    Design Shear Pin for Gate Valve at 763 N.m Torque

    Background: To prevent too much torque having to be transmitted through the gearbox on a gate valve, a shear pin is to be fitted between the hand wheel and the gearbox spindle. When a certain torque is reached the pin should rupture and no torque transmitted. See attachment for reference...
  9. D

    The Mathematics of Airfoil Design

    My question is kind of simple, does the calculus of variations find its way into the design of the shape of an airfoil? I'm interested in what kind of mathematics gets used in basic airfoil design. I suspect the calculus of variations must be involved, but I know nothing about deriving the...
  10. U

    Help with Flywheel design

    I am designing a flywheel for my own system. I don't know what are the input I should consider to design my flywheel and need to find what is mass & speed of flywheel should I use for my system to avoid fluctuation and uniform motion. I have attached the system picture and I have mention the...
  11. H

    What Are Innovative Senior Design Project Ideas for EE and CpE Students?

    I'm starting my undergrad senior design course and I'm having a bit of trouble coming up with a good project idea. The team consists of 2 EE's and 2 CpE's. Our project is supposed to take 2 semesters ( design / build and test ). I want to do something challenging and fun. Please share some...
  12. A

    What Background is Needed for a Career in Design Engineering?

    I have a quick question regarding graduate school. One of my dream's has always been to design aircraft - hence, I would like to focus my career on engineering design. The problem is that I have no idea what type of background a student would need to enter into this type of field. Currently I am...
  13. S

    Third year project - CFD nozzle design

    Hi, for my third year project i have got to design a nozzle to fit a fire extinguisher. However firstly i must analyse fluid flow within said nozzle, but i have no idea how to use GAMBIT/FLUENT and finding it difficult to find relevant user guides on the internet. Anyone care to offer some...
  14. H

    Pulse transformer/DC reactor design.

    Hi everyone, I am trying to understand the basic design requirements and rules for designing a pulse transformer which includes two secondary coils, one of which acts as a DC reactor. Does anyone know of any papers or software or have any experience with such a design?
  15. C

    Mechanical design engineering hanbook site

    Hello all, Maybe it will be a silly idea, but I fink about design engineering database-handbook site creation. In this site will be published something like: material standards, fitting element standards, short guides about some elements design key elements creation, or advantages -...
  16. C

    Help me in design calculation for hybrid car

    Hye everyone... My project is regarding with hybrid car.can someone show me the calculation and the formula used to proved this value.taking example honda insight: for engine: Engine Type: In-Line 4-Cylinder Displacement (cc): 1339 Horsepower @ rpm (Combined: engine (SAE net) + electric...
  17. J

    Different type of solenoid design help

    Hi my name is Juan Motta and i´m new in this forum, I`m a total begginer in physics. I´m planning to build a solenoid (air coil or iron coil, i don´t know) with different form, like this: http://www.divshare.com/img/thumb/19310413-b22.jpg And i have some cuestions about, because i...
  18. S

    Electricity generation - simple bike dynamo - can anyone explain this design?

    http://img404.imageshack.us/img404/9523/dynamos.jpg I understand that when the rotating magnet spins, current should be induced in the coils which powers the lights. So what is the point of the soft iron core? The rotating magnet should magnetise it because it is near it, and it should...
  19. J

    What Is the Best Aerospace Design Software for a High Performance GA Aircraft?

    Hello all... I'm new to Physics Forums so I'm not sure if I'm posting this in the correct area but here goes anyway... I'm interesed in designing a high performance composite GA (general avaiation) aircraft but need some assistance with selecting a good design software. I'm primarily...
  20. T

    Automotive Improving Exhaust Performance with Crossover Pipes in 4 Cylinder Headers

    Currently this engine uses a 4-2-1 Setup with a crossover a few inches away from the exhaust port on the header primaries, only on cylinders 2 and 3(which is well before the first collector) This Engines Firing Order is 1-2-4-3The Crossover linking Cylinders 2 and 3 confuse me since are not...
  21. S

    Designing Bellows in Cryogenic Pipes: Advice Needed

    Any pro here know how to design bellows in a pipe? especially cryogenic pipes, which have a -196 degree celcius of liquid nitrogen flowing inside.. i m out of idea and info... limited resources online.. Kindly give some advices... million thanks
  22. M

    Philosophy Playing Cards Design: Looking for Feedback

    Hello, everyone! I am new to the forums here, so I will start with a brief introduction. My name is Martin Pulido, and I am philosophy graduate who also happens to love card games (as well as board games). Card games not only illustrate philosophical ideas (War=Determinism), but many are also...
  23. T

    Coil design and magnet orientation in a unique generator

    First, I am not an electrical engineer - I am a hobbyist building a prototype linear-stlye generator based on an idea I had which, for various reasons, cannot be built with magnets that pass completely inside of coil(s) like most of the ones I have seen described for wave energy capture and...
  24. G

    Bridge design conceptual questions

    Homework Statement I'm designing a Pratt Bridge (http://www.garrettsbridges.com/photos/pratt-truss-bridge/attachment/pratt-truss-bridge-2/). It must be able to hold 10,000 lbs at pins every 5 feet and be 40 feet long. 2. Homework Equations / 3. The Attempt at a Solution I know how to...
  25. D

    How Can I Start Designing Electric Cars?

    Hey guys, this is my second time writing this first time browser crashed and lost it all I hate it when that happens. Anyways I will make this one shorter. My name is Tom, dropped out of formal school in 7th grade due to family troubles, got my GED recently I am 28. I live in Las Vegas...
  26. B

    Bezier Curves in Mechanical Design

    Hi Folks, Sorry if this has been asked before but I have searched the forums and can't anything to do with this. Also please correct me if I am posting in the wrong forum. I am making an application with functionality similar to a revolution of a sketch within any CAD program. I...
  27. P

    Is This Particle Accelerator Design Effective and Viable?

    I've attached a picture of an ion accelerator design I just though of. The power source can be any constant DC supply; the voltage X would only be limited by the breakdown voltage of the gap at a given pressure. The pairs of plates are close enough together and large enough that the E field...
  28. B

    What knowledge is needed for Electromagnet design?

    guys, I want to design a electromagnet. but i do not know how to start. so could you please tell me what knowledge is needed for electromagnet design? Or you can recommed some data that i can find and buy myself. thanks in advance!
  29. A

    UWB SFCW or FMCW Transceiver design?

    Does anybody know how to design a UWB Stepped-Frequency Continuoud Wave (SFCW) or Frequency Modulated Continuous Wave (FMCW) Transceiver? If you have schematics or you can explain a relevant block diagram in detail, please reply. Regards, Ali
  30. parazit

    COMSOL Multiphysics : Bending -Dipole- Magnet Design

    Hi friends. I am so new with Comsol software to design something but I wonder, if it is possible to desing a bending magnet (dipole) and simulate the motions of electrons ? I really would like to do this. Please give me a hand,help me to handle and try to do one together. Best.
  31. M

    Greater Knowledge = More Evidence for Design?

    Greater Knowledge = More Evidence for Design?? I was studying bacteria. With better technology we have been able to determine that bacteria have an extremely detailed motor that allows for transportation. It is equivalent to a human swimming thru thick grease at 60 miles an hour. It baffled...
  32. E

    Electromagnet Design - Value of inductance L

    Homework Statement Hi all, I am working on an electromagnet design. It is a C-shape with an air gap of 80mm. The number of coil windings is 320 turns. I would like to generate let's say B = 30 mT = 300 gauss in the air gap. Area of air gap Ag = 80mmX80mm = 6.4e-3. Mean length lg of...
  33. M

    Aerospace Engineering Space Systems Design Careers?

    I plan on switching from electrical to aerospace engineering in the winter and aerospace engineering at my university is basically split into 4 parts, the one that seems to interest me the most is the space systems design), but I'm curious if there is any aerospace engineers here who are in that...
  34. E

    How Can We Design the Most Efficient Micro-Wind Turbine Propeller?

    Hi everyone! I would be so happy if someone could help my little brother and I answer a question for a science project that we have researched ineffectively for hours. We hope to design the most efficient propeller for micro-wind turbine. The purpose of this propeller is to naturally rotate when...
  35. M

    Quantum well laser diodes - Operation and design

    Quantum laser diodes. How does light escape? I recently became very interested on the functioning of these amazing devices and so I read online about the topic of quantum wells, semiconductors and lasers. After much reading I believe I can now understand the basics of lasers, resonant...
  36. H

    What Are Some Recommended Analog Design Books?

    Hello, I was googling for analog design electronic book, which describe the issues in application manner, so i found this book https://www.amazon.com/dp/B0072EJ8H8/?tag=pfamazon01-20 Please share your opinion concerning this book and others if you have. Regards, Hisham
  37. C

    Coil Design for Uniform Magnetic Field?

    Dear Forum, I am attempting to make a treatment mattress or pad for PEMF treatment of osteoporosis. I have osteo, and there are commercial units available, but they cost ~$3K+! I have a capacitor discharge circuit, but need a coil design for the pad. I created a gauss probe with a linear hall...
  38. E

    Inductor/coil/choke design confusion

    Hello all, i have an equation for flux density taking the inductor chrecteristics into account as Bmax= (Vrms * 10^8)/(4.44*A*N*f) but the company i work for has given it at Bmax=(Vl * 10^4)/(4.44*A*N*Vss) where Vl = voltage across inductor. i am finding a lot of variation for...
  39. M

    Forum Etiquette inquiryIs it rude to ask how to design a home project?

    Hello... I'm trying to figure out how many magnets I need to put on one side of a piece of sheet metal in order to sufficiently magnetize all the surface area of the other side to a specific attractive force to other pieces of steel in contact with the sheet. It has been too long since...
  40. T

    Senior design project ideas merging biomedical and electrical engineering

    Do you have any electrical engineering senior design projects suitable for someone who is BME/EE? This is one of the (few) classes necessary if I want to also complete the EE major, which I sort of joined for fun, because (i) they have all the math courses, not sure why and (ii) the professors...
  41. DaveC426913

    Designing a Ball Joint for 135 Degree Flex in 1/4" Brass Tubing

    I am building a device out of 1/4" brass tubing. I need to join lengths in such a way as to allow the tubes to flex up to 135 degrees from straight. I haven't been able to figure out how to get that much rotation from a ball joint without the joint falling apart.See attached diagram below for...
  42. R

    Can a Laser and Reflective Material Create a High-Frequency Microphone?

    Greetings, I've been looking for a way to create a microphone capable of picking up high frequencies (up to about 100kHz). Electrets don't tend to go that high and piezo crystals even detuned will only give a limited band. I had the idea of bouncing a laser off a sheet of reflective...
  43. S

    Element Selection for Voltage Doubler Design with Mathematical proof

    I need to design a voltage doubler that takes in 115V-50Hz a.c. and produces a doubled voltage output of 230V dc. I am using this circuit: I need help in the mathematics part: i) How do I find the optimum value of capacitance? (Using high capacitance values reduces ripples; but can...
  44. A

    Flexibility on spacecraft elements design

    I have no prior knowledge on engineering, but has just started my Msc dissertation about using nonlinear programming technique to model a problem that is related to spacecraft elements design. I am uncertain that whether I have fully understood the problem. The problem is to decide the...
  45. C

    Finding the force on a shaft when given Watts - shaft design

    Homework Statement I think I did this right, but for some reason I am second guessing myself. I don't need help with the whole question, just this part: The question says "In this exercise, you will design and analyze a shaft and the bearings for use in a power transmission mechanism. You...
  46. S

    P-Controller Design for Steady State Error

    Homework Statement So this is a bit of a two-part question and I'm unsure which part I'm not doing right (or both!). i) Find the closed loop transfer function of the system shown ii) Design a proportional controller for the system to give a 10% steady state error Any help, hints, suggestions...
  47. D

    State hypothesis for 2k factorial design

    How to state null and alternative hypothesis for 2k factorial design of two factors? The Attempt at a Solution All i can think of right now is null hypothesis - Factor A effects not significant. alternative hypothesis - Factor A effects significant null hypothesis - Factor B effects...
  48. B

    How to Design Threads to Induce Specific Stress?

    Hi all, I would like to know how to design a thread/screw to induce a specific stress on an object. What I have in numerical data is the stress itself that is required. The application is very similar to that of a threaded car jack. By turning the thread, it will lift up the load that was...
  49. A

    Battery Monitor Chips and Circuit Design

    I'm looking at custom building a Li+ battery pack, six or seven cells, and want to design a battery monitoring circuit that measures voltage of each cell and keeps track of charge/discharge. The battery pack needs to fit in a form size of about 8" by 2" by 2" so my circuit should be fairly...
  50. P

    Should New Hardware Designs Specify CMOS or TTL Compatibility from the Start?

    Hi All, I want to understand this, if I go for new hardware design should I make the following decisions at the beginning of the design 1. The design should be CMOS based or TTL based in the sense that all the ICs on the board should be supporting either CMOS or TTL? 2. If I go for CMOS...
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