What is Design: Definition and 1000 Discussions

A design is a plan or specification for the construction of an object or system or for the implementation of an activity or process, or the result of that plan or specification in the form of a prototype, product or process. The verb to design expresses the process of developing a design. In some cases, the direct construction of an object without an explicit prior plan (such as in craftwork, some engineering, coding, and graphic design) may also be considered to be a design activity. The design usually has to satisfy certain goals and constraints, may take into account aesthetic, functional, economic, or socio-political considerations, and is expected to interact with a certain environment. Major examples of designs include architectural blueprints, engineering drawings, business processes, circuit diagrams, and sewing patterns.The person who produces a design is called a designer, which is a term generally used for people who work professionally in one of the various design areas—usually specifying which area is being dealt with (such as a fashion designer, product designer, web designer or interior designer), but also others such as architects and engineers. A designer's sequence of activities is called a design process, possibly using design methods. The process of creating a design can be brief (a quick sketch) or lengthy and complicated, involving considerable research, negotiation, reflection, modeling, interactive adjustment and re-design.

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  1. 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...
  2. 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
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. R

    Acoustic Diaphragm Design

    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...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  14. B

    Need guidance in thread design

    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...
  15. 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...
  16. P

    Hardware Design Clarification

    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...
  17. M

    Trying to design a gear with minimum thickness

    Hello, I am blanking on the equations I should use to calculate the stress through a section of a gear. I would like to be able to calculate the thickness of trepanned gear. Hopefully the attachment helps show what I am looking for. The area between the arrows needs to be minimized...
  18. G

    Graphic Design & Science: Fundamental Particles Visualation

    Graphic Design & Science: Fundamental Particles Visualisation Hello my name is Brendon. I'm a graphic designer interested in science communication and currently studying a masters in graphic design. I was wondering if anybody would be able to help me with a few queries with regards to...
  19. D

    Gearbox design requirements and so forth

    Hi, I am looking to design a gearbox that outputs 200Nm from an input of 0.25-0.3Nm. My question is which gear train method would be more efficient. Also any design guidelines if there are any. The gear box is to be rotated at the input by a users own strength
  20. E

    Automotive Is This Engine Design the Most Efficient Yet?

    Hi i would like to post for discussion my design of a new type internal combustion engine Please post your comments.The following information is to explain the description and operation. In drawing #1 The engine has three heavy pistons all attached together; two small and one large one in...
  21. D

    Simple alternatives protoboards for RF circuit design

    I've found out very quickly that I can't use a breadboard for RF circuits, what is another choice? I know PCB's would be best but making them is very tedious for me. I'm new at this stuff so I plan on experimenting quite a bit which is another reason I want something quick and easy to replace...
  22. D

    Basement Construction Methods - Basement Design

    Hi all, I am working a design project for a geotechnical engineering subject and it goes as follows: A 6 storey building requires a 12m deep basement comprising 3 levels of car park with plan dimensions of 50m by 50m and is to be constructed in a medium clay. The water table maximum level...
  23. B

    Solenoid design: Can a short solenoid have a long stroke?

    Hey, I'm wondering if a short solenoid (50mm) would be able to pull a 300mm core through it if it was open at both ends? Or would the soleniod stop acting once the core had come to the far side? I've attached a pic of what I'm trying to do (forgive the paint drawring). I'm basically trying...
  24. B

    Airspeed Indicator Design Question

    I am building an airspeed indicator that will be mounted on the roof of my car. The design is based on a water manometer. See the attached schematic. I will be able to determine the airspeed based on the weight indicated on the digital scale. My question is in regard to the dynamic...
  25. B

    PCB Design / Fab / Assembly start up experience?

    Has anyone here have any experience on PCB Design / Fab / Assembly start up? May I know how did it to? What are the considerations? What are the challenges involved?
  26. W

    Mastering the Solar System Design: Calculating Cable Loss

    i doing the solar system design. seem like everything is on track now, but just the cable loss i not really know how to calculate, can anyone help me. i has formula on this (resistance on the cable (Ω/km)x length of the cable(L) x current of the solar panel(A)). for the equation above , is...
  27. W

    Calculating DC Cable Loss for Solar System Design

    I'm doing the solar system design now . so far seem like everything is on track, but now i face a problem on the DC cable loss. is that has any formula to calculate the dc cable loss, i has using this formula is (losses of the cable (Ω/km)x length X current produce by the solar panel...
  28. 5

    Automotive Where Can I Find DIY Car Radiator Kits and Cores for Aluminum Radiator Design?

    Hello I am new here, Can anyone share with me on how to design car radiator.:confused:
  29. D

    Best graduate programs for GEN IV reactor design

    Hello, I would like some recommendations on universities that have nuclear engg. graduate programs that specialize in design and analysis of GEN IV reactors. My professors have recommended the following: 1. Michigan 2. Penn State 3. MIT 4. North Carolina State Any info regarding grad...
  30. G

    Design a Toy with Kinematics: Get Creative

    As part of a culminating activity for my course, I am asked to design and build a toy for children that uses kinematics and conservation of energy. I was wondering if anybody could post some ideas?
  31. R

    What is XFoil and How Does it Aid in Airfoil Design Research?

    Does anyone know of any types of research out there that attempts to establish analytical ways to design an airfoil. As far as I understand it right now, when someone wants to design an airplane they grab some premade airfoil shapes and test there design empirically using CFD or a wind tunnel...
  32. F

    Designing a Shaft for Specific Torsional Loads

    I need to design a shaft that have a specific torsional load acting on it. I have the safety factor of 2 and have a table of material properties (yield stress, ultimate stress, shear modulus, modulus of elasticity etc.). I need to find the diameter of the shaft that resist the specifies...
  33. E

    Information on Teller–Ulam hydrogen bomb design

    Hi there, I have a question about the Teller–Ulam hydrogen bomb design. This will be a long post , but I hope someone can answer it for me. When the first bombs were created, uranium device was simple enough to to figure out. Two sub critical masses of u-235 joined at... I...
  34. N

    A design using quartus software, can't figure out how to choose my choice

    hello, i designed a project and i finished it my final step is i want the user to enter 3 bits if it was 000 i will do the first choice, which has 4 inputs and 14 outputs displayed on the 2 digit 7 segment dispaly if it was 001 i will do the second choice, which has 5 inputs and 7 outputs...
  35. S

    How can I accurately calculate damage in melee combat using physics principles?

    Hello everyone, first post :shy: Long story short, I'm sick of conventional role playing game attributes and the math used in combat and am trying to create my own set to make combat more realistic. I realize that the stats are over simplified just to keep it simple for the player (and the...
  36. G

    Mousetrap car design and materials

    Hello, I am building a mousetrap car for my physics class. I have looked at other threads for the best materials and designs but none of them have helped me much. I was wondering if anyone could give me something new to work with. I would like to have a three wheel design but my main...
  37. H

    Need Help Designing an Axial Compressor for My Graduation Project?

    If anyone Have a Process Of Design Or any Designed Axial compressor can help me in my project ...cuz I have a Graduation project Of Design Axial compressor and I need Your Help pleasezzzzzzzzzzzzzzzzzz :)
  38. R

    Electromagnet Design Help Required

    G’day everyone I need some direction / advice in the area of electromagnet design. Application and restrictions: DC supply Push down and hold with 100N of force Pull up with 100N of force and hold with 1,000N of force (or pull up and hold with 1,000N of force) Stroke length: 10mm...
  39. A

    MHB Design Your Own Soundtrack: Incredibox

    You can make choose your style http://www.incredibox.com/
  40. D

    Can Aerofoils Be Designed for Variable Lift and Drag in Race Cars?

    Apologies if this isn't in the right place I am trying to design a controllable aerofoil to give different values of lift and drag for a race car. It will also be used as a brake. it will rotate to give different angles of attack. as a brake it was originally designed to be perpendicular to...
  41. B

    How to design a circuit in which an LED turns on when there is a voltage drop

    I want the LED to be off when there is a certain input voltage let's say 5v (the exact value doesn't matter), but when that voltage drops I want the LED to turn on. I would also like the LED to remain on even when the voltage goes back up to 5v. I was thinking of using some sort of logic gate...
  42. A

    Wind Turbine Design: High Output for Low Wind Speeds

    please excuse the writing in some of these messages as I am typing this from my phone, but I am looking to build a high output wind turbine. I have a few questions. I am a high-school senior and have a large understanding in physics. my idea involves a 12 wing rotor as wind speeds are low in...
  43. D

    Custom Intake Manifold Design for Go-Kart Engine

    I'm new here saw some information i liked here at one point or another and i decided it would be a nice place to join. I am a hgh school senior and next year i plan to go into mechanical engineering. For one of my senior projects I am planning on designing and making a custom intake manifold...
  44. H

    Coilgun Design: Troubleshooting, Current & Coil Specs

    I am creating a coil gun using a capacitor bank consisting of 3 470uF capacitors rated for 500V. They charge to about 250V using a Cockroft -Walton voltage multiplier. A switch controls the amount the capacitors are charged and a voltmeter gives and accurate reading of the current voltage of...
  45. C

    The Mysteries of Laser Mouse Size & Design

    from online descriptions of laser mouse operating principle it's unclear to me that the mouse would need to be particularly big. Is the size of the mouse really based on ergonomics considerations and it could in practice be fit into much smaller case if we wanted to? Is the mouse actually mostly...
  46. A

    Advantages of Using Cast Steel vs. Cast Iron in Gear Box Casings

    Dear All, Can someone give a specific answer to the question 'What is advantage of using Cast steel over Cast Iron in gear box casings.' Or let me put it like this we have changed our specifcation from CI to CS for Gear Box casing(gear boxes for belt conveyors),now we want revert back due...
  47. R

    Backwards Design for Roller Coaster: Projectile Motion

    For my grade 12 physics class, we need to build a roller coaster. We are given a marble weighing 5 grams and it must be projected at the end of the track. It needs to land 0.5 m at a target when it is projected. Since the coaster is made entirely by myself the ramp in which it will be projected...
  48. J

    Circuit Design with Sensors-Your Advice Needed

    Hello everyone, I'm Jamie and at the moment I'm at the final stages of my final year design project. I'm designing a piece of exercise equipment that motivates children to exercise but have run into a bit of a problem with regards to the circuitry. The image above shows the finished...
  49. L

    What Is the Maximum Output Voltage of a Custom Voltage Multiplier Circuit?

    Homework Statement You have two 120VAC:24VAC transformers, 16 high voltage capacitors and 10 high voltage diodes. Design, on paper, a circuit that maximizes output voltage. What is the maximum voltage of your circuit? Homework Equations The Attempt at a Solution So my textbook...
  50. T

    Basic fountain design - recommendations

    Hello everyone, I'm interested in making a basic 3d fountain design using some of the software in my lab, mainly to start developing intuition in using such software. Would Creo or Inventor be better for the setup? Also, if I wanted to test the water flow through the fountain at different...
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