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. C

    How do equations play a role in circuit design?

    I'm new to electronics, but I'm a physics student. I'm assuming that when someone designs a circuit, they use equations to calculate an end result (e.g. the charge on the electron) and they select components that make these changes in the circuit. For example, is the equation: ΔE=hf involved...
  2. C

    Design lift without electricity

    This is my project..you have any idea how can generate power to lift elevator.
  3. N

    Calculate CO2 Dissolved in 5M KOH Solution | Pressure & Temp

    Can someone tell me how much CO2 I could dissolve in a 5M aqueous solution of potassium hydroxide and how to calculate this? This would be done at high pressure and low temperature, and if you can tell me what temperature and pressure would be optimal and why, or how to figure that out...
  4. S

    Vacuum chamber thickness design

    Vacuum pressure for design of pipe Dear experts, I have a line pipe which internal design pressure is 98 bar,dia is 36: thickness is 13 mm,length is 12 mtr. I want to know that how much vacuum pressure sustain by this line pipe? Regards, Satish patel,
  5. S

    Discover the Best Brake System for a 70Kw Engine Dyno Design

    Hi all, I'm designing a 70Kw engine dyno and I'm thinking to use a friction brake with a pneumatic actuation. Which kind of brake system usually have such commercial engine dyno? Eddy current brake? Hydraulic one? Thanks
  6. E

    FPGA-Based System Design with Multiplexed Ring Oscillators

    Hello Sir, I am PG scholar in VLSI design.I am doing my project on FPGA based system in that i have to used ring oscillator.From number oscillator i need to choose two oscillator based on multiplexer.Can anyone tell me how it is?
  7. B

    The design of a low pass filter

    I am trying to design a 24V dc to 230V ac inverter operating at 50Hz. So far, by using multisim to simulate the circuit I have been able to achieve these parameters but my output is essentially a square wave. I am using a variation of a circuit that I have found on line, and I am now trying...
  8. J

    How to Optimize a Multi-Diameter Shaft with Varied Components in MATLAB?

    How would you go about designing a shaft with 2 bearings, 2 gears, and the shaft has various diameters (d1, d2, d3)? You know how much power needs to be transferred from one gear to another, the distance between both of the gears, the minimum allowed distance between gear and bearing centers...
  9. kini.Amith

    Design of a machine/ machine component

    I have an assignment for which I have to design a machine component (or structure) of my choice after estimating the loads that may arise on normal use. We are expected to use the things we have learned in our Machine Design course like design of clutches, brakes, shafts,couplings,power screws...
  10. P

    Calculating Bolt Selection for Butt Joint Connections

    I am trying to select a bolt for a butt joint connection. When you guys do bolt selection, are there certain equations you use to determine if the bolt will rigidly hold the 2 parts together in the joint?
  11. B

    Help with Schematic Design for BLE Device

    I am trying to build a BLE device and have run into some obstacles. I did create a basic breadboard circuit using an Arduino Uno and the Redbear BLE Module and am trying to shrink it down to a much smaller PCB. The schematic is attached as well as the datasheets for the microcontroller and the...
  12. L

    Help with Magnetic Clutch design

    I'm just designing a simple magnetic clutch that i can can alter the Break-away force by changing the air gap between the two diametric magnets. I guess I'm having a hard time understanding the practical difference between flux density, field strength and Force at a given distance of magnets…...
  13. N

    How Do You Design a Linear Generator for High Frequency Movements?

    Is there a clear design procedure for a linear generator. I'm in need of fabricating it for my project. what i exactly need to know is how to choose the coil and the magnets for high frequency, low displacement movements. this would help me in buying the correct coil and magnet for the same. is...
  14. B

    Optical design for a tent camera obscura

    Hello all, I've been trying to come up with an optical design to basically form images onto a sheet positioned near the ground, in an old camera-obscura fashion. Hopefully this image helps to visualize. http://www.pinholeblender.com/COimages/mirror.gif I know that I will require a 45...
  15. V

    Suspension design for medical stretcher

    Hello guys. I've planned to do my project on mechanising stretcher so as to minimise the injuries caused in handling casualties/traumatic patients on stretcher. My intuition was that if we could make a suspension/vibration damping mechanism along with special retractable compartments for holding...
  16. T

    With a Few Design Features for a Trompe

    Hi Everybody The plan is to build a trompe in rural Nepal. Has anybody here built one? Sure would love to hear from you. I believe we could generate enough psi to run a pneumatic motor that puts out 8.4 hp possibly more but i would like to start there and see what sort of output we...
  17. J

    Problem - Embedded System Design

    Homework Statement Your embedded system has an 8-bit microprocessor, which has a 16-bit address bus. In addition, you have a 32-Kbyte FLASH chip, and a 8 KByte RAM chip. You want to locate the FLASH chip right in the beginning of the address space and the RAM at the end of the address space...
  18. M

    Optimal Blade Design and Reduction System To Lift 5lbs

    Hello, I'm working on a project for my college class where we need to build a windmill that will be able to lift a 5lb mass 3ft above the ground. The energy of the wind is produced by two 20 inch box fans. We are allowed to use several materials- pine wood, ice cream pails, floss, nuts, bolts...
  19. W

    Thermal properties - Experimental Design

    Apologies for the break from format, but I'm not sure how to make this fit! I'm designing an experiment to compare the insulation properties of several materials. I would like to find the Thermal Conductivity (K) or the U (or R) values of these materials. However essentially all I am after...
  20. B

    Efficient Design of a Full Adder with Karnaugh Maps

    Just a quick apology for the long post. Recently I have been looking into digital circuit design and how karnaugh maps can help you simplify a logic table to simple gates. I extended this idea to trying to derive the most efficient full adder design and came up with the following logic table for...
  21. PrincePhoenix

    Logic Design: Interpreting entering and leaving a room.

    Homework Statement Hello. We have been given a project in our course "Digital Logic Design", which is an introductory course to Digital Logic. We are only allowed to use gates, multiplexers, flip-flops/latches, counters, comparators, simple displays (like seven segments) etc. I am making...
  22. V

    Twin turbo intercooler pipe merge using air ejector design

    I'm converting my turbo system from a single turbo to a sequential twin turbo system. Where the two turbos intercooler pipes join, the flow from the first turbo to spool can easily reverse back through the second turbo to spool, unless you have a one way valve like a swing check valve to stop...
  23. 3

    Control System Design Homework Help

    Homework Statement Attached below. Homework Equations How can I know I got the correct set of parameter in step 5. I did everything using MATLAB but couldn't figure out how to get the right value of the zero. The Attempt at a Solution Attached below.
  24. M

    Machine Design - How To Determine Motor HP Etc.

    I am planning a build on a simple 4-wheel-drive cart for hauling equipment for my business up/down yards with grade. 4 wheel cart will have weight capacity 1500 lb with potential of crossing up to 35 degree slope (slow RPM/high torque/motor brake necesary.) This will implement a 110V AC...
  25. K

    Multiply Binary Numbers with Hex Keypad

    hello, I'm trying to design a "calculator" that multiplies two four bit binary numbers without using any type of programming or microcontrollers. so far it can multiply and show me the answer, I am using a hex keypad, and ascii display. but I am having trouble since i have to actually show...
  26. A

    Designing a Roll Cage for an Electric Car

    I am a bachelors mechanical engineering student with a decent factual knowledge about cars and how they work. But i am a novice with no experience when it comes to design. Now I (along with 3 other guys) have been assigned the task of designing the roll cage of an electric car. I did not get any...
  27. M

    How can I design a radiator for 100 kW of heat rejection?

    hi, all. I have to design a radiator rejecting 100 kw of heat.how can I find example projects.
  28. R

    Piping System Design Problem Solution

    1. Homework Statement Piping System Design Problem The design of a piping system is required to deliver chilled water to a four-story engineering design office building. The chiller is to be placed in the basement of the building. Chilled water is to be delivered to the air handling units...
  29. B

    Can a Race Car with Magnetic Wheels be Designed for a Final Project?

    That is being done for my final project. I am following this concept: http://sci-toys.com/scitoys/scitoys/electro/railgun/railgun.html With the aluminum strips and thinking of making a race car and placing it on it. Now, would there be any restrictions on designing a race car with 4...
  30. C

    Detailed engineering design, technology

    Hi, is there a website that gives the detailed design and technology of various devices/equipment and/or manufacturing processes? howstuffworks, popsci and other similar sites have very trivial and basic information. some typical examples i am trying to find are.. camera, fridge...
  31. E

    How to Design a 4 Bar Linkage Claw for Underwater Use?

    Hello All, I am working on a final project for class, and I am trying to design a bar linkage claw design like the one I have attached. I have also attached my attempt to design the length, and where the base pins are supposed to go for the desired start and finish position, open and...
  32. R

    Motion of a body - conveyor/catapult/trebuchet design

    Hello All, I posted this same question to the classical physics forum - but I'm reckoning it's more ideally suited for a Mechanical Engineer: I'm currently working through a scenario in which the following occurs: An object of mass M1 (kg) approaches a rotating wheel at a speed of S1...
  33. M

    Chemical Reactor Design Optimization

    Homework Statement Homework Equations The Attempt at a Solution For this problem, my group is having difficulty figuring out how much Styrene is reacting, since we don't know the molecular weight of polystyrene, we can't find the moles of polystyrene, which would be used to aid in finding the...
  34. H

    Step-by-Step Guide: Designing an E-Shaped Electromagnet for a Magnetic Levitator

    Hi guys and gals Long story short I'm trying to make an magnetic levitator (like you can see on youtube), basically a floating metal ball, this will be part of a project I'm doing but the issue is I have absolutely no idea how to go about designing a electromagnet from scratch (which is a...
  35. A

    Help Designing a Gas Cooler for Senior ME Student

    Hello, I'm a senior ME student and for part of my project I'm designing a gas cooler, and I need help understanding the heat transfer process going on (I have yet to taken heat transfer). So basically my design is a a metal pipe (AISI 302 Steel k=15.1 W/m-k) carrying the gas (which for...
  36. B

    Designing Motorbike Frame: Researching Forces & CAD Design

    Hi, Firstly i just want to apologise if this is in the incorrect part of the forum. I'm designing and building a motorbike frame for my 3rd year project in Mechanical Engineering. I've started my research into finding the optimal geometry for the purpose of the frame, however I'm...
  37. N

    Optical design: BPP beam parameter product M^2 and beam expander

    We work on optical simulation where we use not ideal beam expander. Not ideal means that for beam expander designed for single mode (M^2=1), the output beam has M^2 >1 (M^2 = M squared) In our system we want to use beam expander with multimode laser beam. The beam expander is not ideal (for...
  38. E

    DAC-Opamp Implementation: Opinions on this Design (does it work?)

    Hi all, I'm fairly new to DAC's, so I'd like your opinions of this design before something explodes: I am trying to implement this particular design to process sounds. I've added capacitors for decoupling noise, and found this to be the most condensed design that can fit. I am not so...
  39. H

    Engineering Circuit Design - Comparators to light an LED

    Circuit Design -- Comparators to light an LED Homework Statement I need help designing a circuit that takes an input voltage and then lights a single LED if and only if V in is greater than or equal to 2V and less than or equal to 1 V. It can only use 1 Power Supply unit, +/-5V Circuit must...
  40. D

    Why Does Generator Rotor Speed Decrease with Higher Ratings?

    Today I observe some generators of different rating which have designed by a company called X. I notice that the speed of the rotor reduce as the rating of the generator increased. Could someone please explain it to me why?
  41. helofrind

    Transisor beta to design transistor circuit

    i was wanting to know if anyone knows how to choose the value of beta when trying to design a simple transistor circuit? let's say we're using a 2n3904 NPN 12Vcc with with three resistors RC, RB, and RE. how do i determine what value of beta i should use? i want to determine beta so i can add...
  42. A

    Controller Design Homework: Stuck on Problem 1a - UCSD Robotics

    Homework Statement http://robotics.ucsd.edu/final_143b_13_version1.pdf I am stuck on problem 1a. I understand all of the concepts I am just unsure of how to determine the best possible location to place the unknown zero. The Attempt at a Solution I know that the zero must be...
  43. B

    Calculating Bore and Stroke for a CO2 or Air Powered Engine

    To give a little background I have machine tool training but not much other than what I have taught myself in general physics. Its a VERY interesting subject for me and I have thought about going back to college just to take a course or two relating to it. I come up with various ideas I would...
  44. M

    Electroplating Fume Suction System Design

    I've recently been put in- charge of reviving a Fume Suction System installed at the electroplating section of factory. After my stint in the army my engineering skills leave a lot to be desired, even though i am a Mechanical Engineer (by education not profession) so it is my request to PFers to...
  45. S

    MHB Product of Sums Design Problem: Did I Minimize the Equation Correctly?

    Need someone to check my answer please. Consider a 4 input, 1 output digital system (W,X,Y,Z, and f respectively) . Design a POS circuit with any number of inputs such that f(W,X,Y,Z) = M(0,2,4,9,13) + D(6,14). First fill in the Truth Table, then find the minimum product of sums equation using...
  46. H

    Engineering Logic Circuit Design Homework Solutions

    Homework Statement 1. A nuclear power plant contains three danger sensors X, Y and Z that can shut down the plant. Sensor Z is in such a senstive location that it has a backup B. The plant is to be shut down if two of the three sensors indicate danger. However, with exception, sensor Z is...
  47. T

    Drawing the Design of an SRAM Chip

    Hello everyone, I have come across a question that I am having quite a hard time with. I am to draw a design of an SRAM chip with an organization of 2M*128 SRAM that uses 1K*1K arrays of D latches. And then the questions ends with saying, "if this design is not possible then explain why." I...
  48. S

    Questions about the ASME Student Design Competition 2014.

    This years ASME Student Design Competition is building a UAV to navigate a simple obstacle course and drop a 1 gram payload into a target zone. My question is, is anyone able to decipher their scoring criteria? The problem statement, guidelines, and rules...
  49. U

    Circuit Design Struggle - Diagram and Breadboard Setup

    As an ME major I am less than comfortable with circuit design, so I have been banging my head against a circuit I need to layout on breadboard for a couple hours now. Below is a link to a diagram of the desired circuit, as well as a picture of the breadboard setup I am using. Diagram and...
  50. R

    How to Design a 3 Button/1 LED Circuit?

    Homework Statement Design a circuit with three momentary, normally open, button inputs and one LED output. The LED must light anytime exactly two (2) of the buttons are pressed simultaneously. The LED has the following characteristics: Vf = 0.83 If = 14.2 - Draw a neat schematic diagram for...
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