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. G

    Problems with the current design of ellipsometers

    Hi folks! For those of you who are familiar with ellipsometers, are the following some significant pains/problems with the apparatus? Are there other significant pain points? 1. The machine is too bulky. 2. The change of angle is too slow. 3. The minimum angle is limited by thickness of arms...
  2. S

    Impact force calculation due to a rotating object in Overspeed Trip Valve Design

    Bolt comes out by distance d=1.58 mm when speed of rotation of shaft reaches its trip value (w_trip). m is mass of trip weight (Bolt assembly) One of the approach which I had considered is work energy theorem. Initial energy = 0.5m*(w_trip*(r+d))^2 Final Energy= 0.5m*(w_trip*r)^2 (Assuming bolt...
  3. MacLaddy

    Engineering Project Engineer to Design Engineer

    I’m wondering what skills are needed to go from being a project engineer (in the construction industry) to that of a mechanical design engineer? More specifically, what exactly is an employer looking for when they hire a design engineer? We all know that any good engineer should have great...
  4. benderlee

    Design a system to measure the electroretinogram (ERG)

  5. F

    Plumbing Syringe/Stepper Motor Pump Design

    Hello. I've built this syringe pump. The chosen motor is a NEMA 11 with a maximum torque of 6 Ncm. The thread rod is an M5 with a pitch of 0.8 mm. The whole system will consist also of a long tube (1 m length, 3.175 mm external diameter, 1.5875 internal diameter), at the end of which I'll need...
  6. A

    Tennis Ball Launcher: Build a Mechanical Launcher

    I have a project which consists in making a tennis ball launcher for training kids (6-12 years), but there is a catch, the mechanism can't have any elastic parts (springs, bands, rubber). It has to be purely mechanical. I need help
  7. D

    Increasing Torque with Gerotor Design: Lengthening, Diameter, and Series

    How do you increase torque in gerotor design other than increasing flow. Will lengthening it increase torque? Will increasing diameter increase torque? What about running 2 or 3 in series?
  8. T

    PCB design and schematic for a half bridge power amplifier

    Hi, I am making a half bridge power amplifier that operates at 24 V. The bridge has to supply around 3A current to an inductive load (10mH) The bridge will be controlled using 20kHz PWM from a microcontroller. I have put a ACS712 current sensor in the load path to give feedaback to the...
  9. X

    Engine design -- Fusion powered rockets

    I found this interesting engine design on the internet. It is one of the most powerful and largest machines human have ever designed. It is a fusion powered propulsion device, it uses “heavy fusion technology” which can use any elements lighter than Fe-56 as power source. Is this design feasible?
  10. J

    Design a non-linear conical compression spring

    What is the method to design a Non - Telescopic, Non - Linear, conical compression spring from a Force - Deflection characteristics
  11. E

    I Advancements in Cyclotron Particle Accelerator Design: A Scientist's Perspective

    I've been working on modifying the cyclotron particle accelerator. Tell me what you think? It's pretty basic though
  12. Clay2

    Turbine Design for fire-hose driven shaft

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  13. S

    Is the use of null an anti-pattern?

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  14. A

    Engineering Road to R&D: Electrical Engineer Qualifications & Academic Career

    I am going to graduate this year with a bachelor in electrical energy engineering, i am very passionate about designing and fixing problems, i would love to work in the R&D department of some multi-national company, but i don't know where to start. What qualifications do they usually ask for...
  15. H

    Optical Simple optical lens design help (small projector)

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  16. A

    Design a shaft considering torsional failure

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  17. F

    Design a 4:2 priority encoder with active low and enable

    Homework Statement Design a 4-2 priority encoder with active low and enable. Homework EquationsThe Attempt at a Solution Here's my work , but I don't know how to connect the enable input. Any help would be greatly appreciated ! ##A = \overline{I2}+\overline{I3}##...
  18. S

    Event-driven system and subscribers missing events

    Let's say I have a service that publishes events, like eo ("Bought 100 shares of AAPL") e1 ("Bought 100 shares of T") e2 ("Sold 500 shares of TSLA") and there exist stateful services subscribing to the events and whose state depends on the events being processed successfully and in the correct...
  19. F

    Design a 3:8 Decoder using 5:32 Decoder

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  20. F

    Engineering Design a logic circuit to add two 2-BCD decade numbers

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  21. F

    Design a 2 to 4 Decoder using 4 to 16 Decoder

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  22. K

    Help me design a Vacuum Drying system

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  23. V

    Design courses for Electrical engineering

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  24. P

    Radar System Design: Reduce Power & Range for 1km Reach

    I have been reading up on clear-air pulsed radars and am wondering if it is possible to scale down a large radar system to one with reduced power and gain, but also greatly reduced range. Here are the specs for a large radar: Output power = 2.5 mega Watts Antenna gain = 47db. Range = 15km. If...
  25. S

    Microservices architecture disaster

    Let me describe the problem I see as an engineer when a business wants to create microservices out of its "monolith" (a term used derisively to describe an existing service that works quite well). You have X that you want to divide into A, B, C, or maybe A, B, C, D, E. So you want to create 3...
  26. EelAnes

    What is the coefficient of drag on a flat surface?

    What is the coefficient of drag on a flat surface? Note: The body is in free fall The object has 2 wings planform (it's a paper helicopter), which is flat The object's wing spin in a circular motion (anti-clockwise) during free fall
  27. A

    Shell and Tube Exchanger Design Problem

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  28. P

    Is this kind of pressure chamber design possible?

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  29. A

    Gear Wear Rig Design: Calculating Load for Maximum Durability

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  30. A

    Design of a Double Pipe Heat Exchanger

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  31. SeeSharp

    Automotive Design and Simulation of a four stroke Otto engine

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  32. O

    How to design a motor with a given set of requirements?

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  33. W

    Engineering Grounding Op-Amp circuit exercise

    Homework Statement 2. Homework Equations 3. The Attempt at a Solution For the first set of questions: I've worked through to part 6), at which is I encountered my first problem. I'm not entirely sure what the question is asking. Is it as if there would be a capacitor between...
  34. polytechnophile

    Electrical Design Case Studies

    Can anyone recommend a place to find case studies in electronics design? I am looking for concrete examples of the engineering process from requirements definition through PCB layout. As a physicist who designs instrumentation I would like to improve my improve my design process and employ more...
  35. J

    Air Turbine Design -- advice regarding a Hall sensor type air flow meter

    Hello all, I am after some advice regarding a hall sensor type air flow meter. I know from experience that most hall sensor flow meters allow a bypass of fluid around the turbine/fan. However I would like to know what would happen if this was the case of the design below. Specifications...
  36. Lapse

    Engineering Design Circuit to Convert Current to Voltage | LTSpice Also

    Hello, We just finished up midterms and I actually did well--got an A. However, somehow between the midterm (class before last) and last class we jumped to creating a circuit with a diode. I am pretty lost. 1. Homework Statement Homework Equations Voltage / Current = ResistanceThe Attempt...
  37. R

    How to design self-reversing screws?

    good afternoon I would like to design a self-reversing screws for a small personal project, but I can not find anything to be able to carry it out, as well as measurements, thread pitch, gypsi, ... to see if you can help me
  38. B

    What design of a drive system should I use?

    Hi there! I am currently making a design about drive systems used for micro-hydro scheme. I don't know what type of driving element is suitable to used for transmitting the power from a turbine (cross flow turbine) to a generator. I'm planning to use both chain and sprocket & V-Belt Pulley which...
  39. prashantakerkar

    I How have changes in table tennis racket design affected the game?

    https://en.m.wikipedia.org/wiki/Table_tennis_racket Would like to know the impact for the table tennis game if the racket is changed to a String type Lawn tennis or Badminton racket? Thanks & Regards, Prashant S Akerkar
  40. charliebrown

    Patient Lifter Boom design for my ME Senior Project

    Hello, I'm a student of mechanical engineering and I'm doing a project for my university in order to graduate. Right now we are doing the design for the boom of the crane but I have some doubts according to the analysis we could say is the FBD part my team says that the beam is considered as fix...
  41. Ripcord96

    How to approach the design for a boat step by step?

    Two pontoon boat design approach and how to find center of gravity, center of buoyancy, buoyancy, volume of displacement, meta center, meta centric height. I need to know is there a different approach to designing dual hulled boat than a single hulled boat and all the formulas and examples I...
  42. AchillesWrathfulLove

    How do I learn to design and make my own electronics

    I have currently only worked on resistor networks and gaining the skills to analyze them. I am now beginning to learn about RL, RC and RLC circuits and still I don't think this is enough knowledge to create my own circuits. To create a circuit you must have a function in mind as in "what do I...
  43. Ben2

    A Quaternions and Video Game Design

    On p. 566 (Section 563) of Hamilton's Lectures on Quaternions, I find "Operating with phi, and making reductions analogous to those of recent articles..." The 2nd derivation, beginning with "phi rho prime" so far totally eludes me. Let me apologize if this is the wrong forum. Quaternions have...
  44. cpcoe

    AC vs DC servo motors in large scale cable robot design

    hi, I'm designing a 50ftx50ft, 8-cable Cable Driven Parallel Robot and am thinking this is a pivotal decision. the corner posts are 10ft tall and the machine should be able to lift 100lbs at least 5ft off the ground. traveling speed of the end effector is less important than accuracy but I'm not...
  45. Ridzuan

    RTG crane -- hydraulic motor and linkage design to turn these wheels

    Hi all I would like to ask your professional guide in designing a hydraulic system. I attached a file, showing sketch of the RTG crane wheel structure. Here are the conditions: 1. The red-line is the hydraulic cylinder with "X" as the fix point. 2. The hydraulic cylinder will stroke out from...
  46. A

    Can a Transfer Function be Used with a Fuzzy Controller for a Prosthetic Hand?

    Hello everyone, I'm new here and I'm working on designing a fuzzy controller, okay so i have a transfer function of a prosthetic hand (23s^2+ 12s+.. / 10s^3 + s^2 + ...) per say, so i have 3 outputs and 2 inputs. How can I use only the transfer function and use it with a fuzzy controller?
  47. Syed Alam

    Career in "Reactor Physics and Core Design"

    Dear all, I have completed my MSc and PhD in Nuclear Engineering (Reactor Physics and Core Design) from a UK university. I am currently working at a National Lab in France. Can you please suggest/recommend me a site where I can find the most suitable jobs related to Nuclear...
  48. Z

    Java How to design chrome logo programatically?

    Hi, Can some body please guide me how to design google chrome logo programatically? I don't want the embosing or outward effect. I thought it can be done by dividng the circle into 3 portions, 120 degrees apart. But where to start this partition to give it an original look. Also we can have...
  49. SilverJW

    I Designing Rehabilitation Equipment for an Upper Limb (arm)

    Before I ask my question, here's a little introduction of myself. I am a college student studying in Bioengineering, so I've been tasked to create an equipment to help rehabilitation for upper limb (any point of the upper limb, doesn't have to be the entire upper limb). So I have this initial...
  50. M

    Engineering Exploring the Fundamentals of Machine Design: Similar Books and Resources

    Hi. I have a problem and I will be so grateful if someone can help me with this. I would like to know are there books that are similar to P.Orlov: Fundamentals of machine design 1,2 and 3. The book should include pictures of what is wrong and better solution of certain design. Thank you in...
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