Design Definition and 1000 Threads

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. S

    Courses Comparing Courses for Postgrad Prep: Microfabrication vs Circuit Design

    Hi all, I am currently deciding between two courses for the coming semester. I am a sophomore math and physics major, but contemplating an electrical engineering/physics postgrad program and possible career. As such, I would like to try out a more applied, lab-type course in order to explore...
  2. A

    Heat Pump Design: Components & Assembly Guide

    Hey guys, I'm looking at designing a heat pump system that uses CO2 as the working fluid. I'm not exactly sure how to pick the components that I need like a compressor, expansion valve, etc. I am trying to create an experimental device that will work in conjunction with my CO2 thermosyphon...
  3. M

    Theory of BiQuad Antenna Design (now a digital TV channel question)

    Hi everyone, I'm Designing a BiQuad antenna for WiFi applications. The design and optimization are relatively simple but i need some references of the theory behind this antenna. I'm reading some theory of Bi-Conic Antennas but it's a bit difficult to extrapolate the idea between both...
  4. C

    Design experiment to test air conditioner performance at different ambient temps

    Homework Statement I have access to a test facility for window type air conditioners that has a small room that is used to simulate the outdoors. I need to use the facility to test the effect of temperature on the performance of one of our window type AC units. The performance must e done as a...
  5. V

    Calculating Motor Requirements for Gearbox Design

    hi i am designing a gear box and i need help on calculating my motors requirements. i have a motor with rotating a gear which is connected to shaft using a gear attached to the shaft. on the top of the shaft a cylinder base is screwed weight X kg. could you please help me thank you
  6. B

    Please help me design a portable breaker tripping device

    Hi! I am going to be as brief as possible in this question. Im currently trying to design a portable breaker testing device that has a very simple mechanism. Basically, this device must be very small and should be able to fit into something like this:http://goo.gl/BuZ6U When I insert this...
  7. Spinnor

    Criticism of small bridge design welcome.

    Criticism of small "bridge" design welcome. I live near a park that has two large hiking areas divided by a stream. If those areas were linked by a bridge the number of possible hikes that could be taken would be increased. The stream at one "crossing" is about 30 feet wide and normally has a...
  8. J

    Help with power supply design for portable device

    I need help designing a power supply for a portable medical research device for animals. My problem is designing a configuration for multiple voltages with pcb size and power efficiency in mind. I need 3.3 V, +/- 1.5 V, and +/- 20 V. Below I’ve listed device info and estimated current...
  9. A

    Off design performance of gte

    Hey every body, I need to ask you about the difference between off design performance of gas turbine engine and the design point performance of gas turbine engine ? Thanks.
  10. S

    Design electromagnet in pipeline

    Hi, I wanted to create electromagnet around pipeline to produce 0.2 Tesla magnetic field. How can it be connected to the DC from 220 Volt.. Please help me..
  11. N

    Need guide to design FIR bandpass filter using calculation or MATLAB

    Homework Statement hey there.. I really hope u guys can help me extracting the important element from the question below; A signal is sampled at the sampling rate of 10kHz. The signal has useful signal content between 1kHz and 2.4kHz, and distortion of not more than 1dB is required for...
  12. R

    Electric Motor Design? Learn How in EE School Classes

    I've been looking at the undergrad catalog of my school and I haven't noticed any classes that teach motor design. I found classes on drives and motor control but nothing on the actual design of motors/generators. I always thought electric machines was a fundamental topic that all EE curriculums...
  13. xortan

    Design a MOS Voltage Amplifier with Gain of 50 V/V

    Homework Statement I need to design a MOS voltage amplifier with a gain of 50. Homework Equations tox = 5 nm u = 500 cm2/V-s Cox = 6.903 mF/m λ = 0.1 Vdd = 2.5V The Attempt at a Solution I am getting confused on just about everything... I am to design a voltage amplifier...
  14. B

    Curved Handles: Mechanics Behind the Design

    Hi, why did they make the handles curved? Is there a mechanical advantage?
  15. A

    Design a condenser of a steam power plant

    This question is from my textbook: Thermodynamics an Engineering Approach 7ed SI Units, cengel. It is problem 10-129 and I can't seem to figure it out. Design the condenser of a steam power plant that has a thermal efficiency of 40 percent and generates 10 MW of net electric power. Steam...
  16. blainiac

    Will this centrifugal fan design work?

    Hello everyone. I am working on a VTOL RC craft that I hope will work. I was planning on using a centrifugal fan to accelerate air radially (instead of a squirrel-cage design), and putting 45 degree truncated cones around it to direct it downwards. I wrote a program with many small...
  17. L

    Electronics circuit design programs

    Hello, Im kinda of new beginner I am looking for virtual program to get Voltage in and Voltage in a design circit using the oscilloscope and function generator, I using ISIS Design and I can get the oscilloscope getting the sine wave, and the function generator that helps to change the...
  18. W

    Preliminary Design Analysis of Landing Struts for a Light Aircraft, Please help

    Homework Statement Hey, I'm struggling beyond belief with this assignment, one of the attached pdf's is the question and the variables given. What I'm struggling with most is what order I'm meant to do things in, I think I've got the start of it sussed but beyond that I'm clueless I've got...
  19. D

    Can someone help me to design a boat inclined lift ?

    I'm clueless how to start!. Here is the description: A canal operating company is proposing to build an inclined plane to lift boats between two points with a vertical height difference of 55m. Currently the boats have to travel a distance of 6km through 19 canal locks to achieve the same...
  20. K

    Please help me design a Li-Po powered nichrome heating element (400°F)

    Hello everybody, hopefully I am posting this in the right spot. What I am trying to do is design a heating element powered by a Li-Po battery (RC battery probably) to heat a heating element to a range of 360-420°F. I want the temp to be adjustable, probably on three settings, so one for 360...
  21. C

    Calculating Velocity for Pressure Testing Chamber Design

    Hey, I am brand new to this Forum, and I am trying to design a pressure testing chamber. The plan is to test a sample cylinder that is fitted with two needle valves and a quick connect fitting for leaks. I want to do this by pressuring it up to 1800 psi with air and putting it in the chamber...
  22. T

    Engineering Calculating Voltage Across 8 Ohm Resistor Circuit Design

    Homework Statement I am designing a circuit and trying to calculate the peak to peak voltage across the 8 ohm resistor. I'm getting 14 volts peak to peak output from the op amp. Any tips where I should start would be helpful. I've attached my circuit to the post, Thanks Homework Equations...
  23. B

    Flywheel design. Inertia dyno for 745 KW engine.

    Hello again, I am currently designing a flywheel for a 745 KW engine inertia dyno. Basically my design requirements are so: Max RPM: 530 RPM (=55.5 rad/s) Flywheel Diameter: 1.7 meters Time needed to accelerate: 60 second (to max rpm) I need help determining the mass of the...
  24. M

    Egg toss design project with target for Physics 12 ISU

    Homework Statement Need to build a container to hold a Large grade A egg that must have maximum dimensions of 25cm x 25cm x 25cm. Score for marks is based on Score = (200 - Distance from target in cm)/Mass of container with egg. The egg is thrown from at least 1 m above the ground and 2 m from...
  25. H

    What graduate fields are best for pursuing weapons design and research?

    Hello, I'm curious about what kind of academic paths would lead to weapon design and research. Right now I'm doing a BS in physics and will likely pick a sub-minor in Mechanics or Electronics. There is also computational physics, condensed matter, and cosmology sub disciplines at my school...
  26. R

    Design a logic gate for each different output

    Homework Statement http://media.newschoolers.com/uploads/images/17/00/58/56/03/585603.png Homework Equations None The Attempt at a Solution I have tried just messing around with them, and I have tried to turn this table into a "boolean" expression. I have no idea how I would begin to solve...
  27. G

    Electrolysis Cell Design. (Not for Car)

    Hello all. As the title has informed you, I wish to make an water electrolysis cell that can not only produce hydrogen, but also store it completely separate from the oxygen (Again, I promise you, it is not for fuel. Now, your probably wondering why I don't just make the typical...
  28. C

    Self Bias Transistor Design Problem

    Homework Statement I have to solve for RD, RS1, and RS2. Homework Equations AVNL=-mg(Rd//rd) Vdd-Id(Rd+RStotal)=0 Bias Line Eq: Vg-Vgsq-Idq(RStotal) The Attempt at a Solution I have solved for RD by using the AVNL equation and the given value of -8 for AVNL. I found RD to be...
  29. D

    Computer design of retaining wall design

    I got material from this site that I used for my proposal(for the literature). Have a time limit to submit the program on the day of examination (1st Dec, 2012). I need a check and correction I attach copy of the flow chart and diagram. C PROGRAM FOR RETAINING WALL STABLITY AND DESIGN C...
  30. J

    How to design algebraic function with particular ramified covering?

    Hi, I wish to study (non-trivial) algebraic functions which have varied cycles at a few places other than the origin. It's not hard to search for a particular covering at the origin. For example, the function f(z,w)=(8 z^2)\text{}+(-10 z-4 z^2-6 z^3)w+(-10 z)w^2+(-3 z^2-6 z^3)w^3+(-9 z^2+4...
  31. C

    Is There an Algorithm for Solving the Combinatorial Design Problem?

    Hey! I have a certain problem. Let M ≥ 4 be an even number and consider the set [0,1,...\frac{M}{2}-1]. The problem is to put those numbers two times in each row of an M x (M choose 2) matrix, such that all possible combinations of entries that contain a pair of the same number occur just once...
  32. M

    Design Electromagnet for 400-500 Oe, 100-800kHz

    Dear all, I need realizing an electromagnet producing a magnetic field changing in direction with a given frequency (from 100 to 800kHz). Max intensity should be 400-500 Oe. I need applying this magnetic field in a small region (10x 10 mm2) and I would prefer the electromagnet not so big...
  33. A

    Difference Amplifer Design with Single Supply Voltage

    Hello, I need some help with a difference amplifier design I'm working on. The amplifier has to be work from a positive voltage supply only. I'm having a hard time getting it work with single supply voltage (it works when I use both negative and positive supply voltages). Both the inputs have a...
  34. F

    Chamber design (mufflers). I'm stuck,

    my lonesome have been working on a set of mufflers that don't sound like fecal matter. I am having a difficult time finding just the mufflers (race mufflers). I DO NOT want an entire exhaust system. I do have the capability of fabing up mufflers, I have custom made equal length headers to an x...
  35. R

    Solving a Slab Design for Proper Thickness & Reinforcement

    [b]1. Homework Statement [ Here is the question that I am struggling with. I am told that my answers are not correct, but I do not know where I went wrong? Any suggestions would help greatly! I attached a paper with all my work shown. Thanks! A solid one-way, continuous slab is used...
  36. E

    Submarine pressure vessel design

    I'm working on the design for a dry-hull model submarine. My plan is to cast the hull shape that I want out of aluminum because this type of casting is cheap, easy to make, and because aluminum has a good strength to weight ratio. I want the hull to be able to withstand an external pressure of...
  37. S

    EML3005 Mechanical Design Project Shaft Analysis

    I need some help Desperately for this class. this project is 10% of my grade and I'm doing really bad in this class >_<. I have read the book but is all talking about is bunch of formulas that i have no idea how to relate them to this. I uploaded the diagram as well that was part of the...
  38. C

    Single Stage Common Emitter Amp Design

    Homework Statement I am designing a voltage divider common emitter amplifier given the following parameters Av= 40 dB +/- 1dB Zi> 1000 ohms Zout< 5000 ohms Stability factor = 5 Beta*re= 650 ohms Beta minimum = 35 Beta maximum = 300 Vcc = 20 volts Rload = 33 kilo-ohms Rsource =...
  39. T

    Mechanical Design vs Energy: Which Path Should You Choose?

    I am nearing the end of college, and have to start picking my electives to get approved. You can mix or match or do an emphasis in either mechanical design or energy. Ever since I started school, I was sure I wanted to do energy because the classes sounded interesting. But now, I have really...
  40. H

    How difficult is it to design a broadband transformer?

    Hello everyone, I am working on a project in which I need to make a broadband/pulse transformer. The transformer will operate in the 20-80kHz range. The transformer will use about 20 watts of power. I need a turns ratio of 1:3. 20V input 60V output It's just for hobby use. I don't have...
  41. A

    UWB Transceiver Design by Ali: Antenna & Transistor Issues

    Hello all, Its Ali here. I am a Electrical (Telecom) Engineering student and my Final Year Project (FYP) is Portable GPR in which I am designing UWB transceiver. Currently I am working on the transmitter part. Here are a few specs of the design: -Simulation Software: NI Multisim 12.0.1...
  42. S

    3 wheel Bicycle design: Front Axle

    I'm trying to understand the angles and force involved with my current project of building a 3 wheel front loading cargo bicycle. The current design stipulations maintain that the rear wheel always remain inline with the cargo(There are a vast majority of designs that do not adhere to this)...
  43. P

    How to become a Design Engineer?

    Hi all! I am happy to find this very informative forum! I have graduated with a degree in Production Engineering and Management and I am interested to gain more knowledge in CAD and work as a Design Engineer. While in University I had a CAD course where I learned to use Pro/E, but that's all...
  44. C

    Auto/Motor Feasibility of a carbon fiber chassis (DIY car design)

    Hey everybody, a couple years ago, I came across the top gear video for the Arial atom: a ~1000 lbs road legal 'go-cart' with a supercharged I-4 engine with a power to weight ratio of 600HP/Ton. Even though the body is already light, I would love too (once I get the time and resources) build...
  45. P

    I need book smart help with this boat design.

    I need "book smart" help with this boat design. Here is a picture of the design which I will explain in a minute...
  46. E

    Common Emitter Amplifier Design

    Homework Statement I have to design a Common Emitter Amplifier using a 2N2222 NPN transistor and an 18V DC supply. The specifications are as follows: Should be stable for variations in forward current gain, β. The input signal to the amplifier is a 0.2 Vp sinusoidal signal, at a frequency of...
  47. A

    How Do Vertical Heat Pipes Work in Geothermal and Solar Applications?

    Hey guys, For my degree project this year I am designing a Vertical heat pipe to be used in a geothermal heat/power production application. I was wondering if anyone knew of some good resources about this topic. Any advice would be appreciated!
  48. W

    Design ultimate bending moment one-way spanning slab

    Homework Statement Find the design ultimate sagging and hogging bending moments per metre width of slab. Load on slab- Imposed 32 kN/m - Permanent 39 kN/m Length: 5m Depth: 8m Thickness: 0.175m Not sure if relevant but it has 2 spans (i.e. two 5m lengths of slab) but...
  49. E

    Audio Amplifier Design Basics: Problem & Solution

    I am studying basics of analog circuit design from microelectronics circuit analysis by donald neamen And in that i encountered a problem in design of audio amplifier. The question and solution is given in the attachment. And i want to know that in the output emitter follower why there are no...
  50. ElijahRockers

    Engineering Op Amp : Design the circuit such that

    Homework Statement Assume the op amp is ideal. Design the circuit such that Vo = Va + 2Vb + 3Vc The Attempt at a Solution Not sure how to go about this one. I started with \frac{V_a}{R_a}+\frac{V_b}{15k}+\frac{V_c}{R_c} = 0 since the op amp is ideal, the sum of the currents going into the...
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