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. jley18

    I bet my friend I could design a circuit with no background

    Hey everyone! This is my first post here so take it easy on me! Before I get into the circuit I'll give a little backstory here. I'm a business student at a US college right now and I have a good friend who is a Biomedical engineering student. We were arguing about whether or not I would be...
  2. B

    Engineering Zener voltage controlled circuit design

    Homework Statement Homework Equations V0=Vsrz/Rs+rz+VzoRs/Rs+rz-ILrzRs/rz+RsThe Attempt at a Solution I formulated 4 cases for voltage inputs of 11 and 13.6 V and 0 to 100 mA. The zener current has to be between 3 and 30mA or 103 and 133mA. How can the current be maintained in thes two...
  3. JohnBM

    Low Level EMF and Helmholtz coil design

    The problem statement: I want to produce an LL-EMF of a specific amplitude and frequency in a pair of Helmholtz coils of pre determined radius. The frequency and amplitude are derived from the following equations from this publication...
  4. C

    Help with design for moving a box

    Hi, I'm trying to design a contraption for a project that will move an item/box up and to the side. I have a picture of what it should look like and how it should look like but I need help with the mechanics of it. The box's starting position is In the ground and under a slap of metal or wood...
  5. O

    PhD Metallurgy Research Design Template Request

    Hello everyone, I have a request. Can someone please provide me with a metallurgy research design template? I'm starting my 5th year in a MSE PhD program and for the last 3 years my advisor has instructed me to perform experiments on my alloy without reason. And while I thought this was...
  6. X

    Relay Driving Circuit Design Help

    Hello all! I hope I am posting this in the right place. I am looking for some help on the following circuit. Basically I am doing a relay application using one of TI's chips. Below is the reference design from an app note along with my actual circuit modeled in TINA. The main function is that...
  7. highvoltpower

    Ring Main Unit Design in Electrical Panels

    what is Ring Main Unit design in electrical panels ?
  8. Chevreuil

    Mount Rack & Pinion Interference in PTC Creo | Avoidance & Solutions

    Hello, I have downloaded CAD models of a rack and pinion, and I don't seem to be able to mount them up in PTC Creo without quite obvious interference. The pinion has a pitch diameter of 24 mm, and a modulus 2. The "pitch diameter" of the rack is exactly one modulus lower than the tip of the...
  9. I

    I Is this Linear Accelerator Design Valid?

    Good Evening Everyone, A group of friends and I were having a mini-contest, to see who could theoretically make anti-matter using the most simplistic design in terms of cost and general complexity. The obvious choice for us was the Positron, due to low energy requirements on all fronts. One of...
  10. Z

    How to Design and set up a strong electromagnet?

    Hello guys. I am new member of this forum and I am looking for some guidance on a certain project. Now, the reason I am posting is that I need your help with a project I am currently just starting and of which unfortunately I have little details figured out as well, so please bear with me if you...
  11. K

    Instrument Design to Deliver Energy to 50mm Circle

    I didn't know where to put this, I figured I'd start here since this area sees traffic that other areas might not see. Someone can move it if there's a better section for it. I'm thinking of an instrument design that has a light path as follows: UV-Vis light source, monochromator or filter that...
  12. NARESH NULU

    Automotive Design End Truck for 600mm Length | Naresh

    Hi everyone, my name is naresh. I'm doing m.e, currently I'm in project, I'm designing a loading equipment for a truck. in which i need to design an end truck similar to monorail's case. so i went through some references. but i need to design it for a small length say not morethan 600 mm. How...
  13. H

    Designing Your Own Transformer for Electrical Engineers

    Hello! I am studiyng for electrical engineer and i think its finaly time to build a transformer myself. I don't do this, cause i need one, but rather to learn how to design it. I'll be happy if you give me instructions how step by step to calculate one. Not how to physicaly build it, but to...
  14. kostoglotov

    Buck regulator design, which parts can be slightly different?

    I want to build http://www.hobby-hour.com/electronics/lm2576hv-adj-buck-regulator-schematic.png From http://www.hobby-hour.com/electronics/lm2576-step-down-switching-regulator.php I might not be able to source exactly the same parts. I assume I have to use the same IC, but could I use a, say...
  15. Eddie714

    What is the Proper Involute Profile for Worm Gear Drive Teeth Design?

    Hello i am having trouble figuring out the proper profile to use for the worm and the gear. I need to model it in solidworks and everything i am finding online is for spur gears. I need to get the worm and gear to mesh correctly so i can do some finite element analysis on it. I have calculated...
  16. Weightofananvil

    Electronic Design component selection intuition

    Hey, So I've taken a course learning theory to mosfets, Jfets, transistors etc. Recently we did an amplifier project with a summing component as a final project. I chose which component pretty randomly. I'm a little misled as to which component is better in certain circumstances. BJT's are...
  17. K

    Zero phase shift Op-Amp bandpass filter design

    Homework Statement "design a band pass circuit having a midband gain of 20 dB with -3 dB frequencies at 20 Hz and 20 KHz the amplifier should not produce any phase shift." does midband gain strictly apply to voltage gain (because that's how i look at it)? I was going to use a common collector...
  18. I

    Fresh graduate career advice in Chip Design

    I have recently passed the Electronics Engineering Licensure exam in the philippines and I'm plannning to pursue a career in chip design preferably mixed signal or digital. I have applied at different semiconductor companies. The problem is they don't design the IC's here, they only conduct...
  19. T

    Design a Crank Mechanism: Solutions & Equations

    I want to design a crank mechanism. I found this page on Wikipedia https://en.wikipedia.org/wiki/Piston_motion_equations Relating from this diagram, is x the max stroke of the piston ?, or is it PO-(max stroke of piston) ? And why is l^2 = r^2 + x^2 - 2*r*x*cos(A) Shouldn't it be, l^2 =...
  20. Noisy Rhysling

    A rational design for a personnel airlock

    In The Martian we see airlocks that an SUV would fit into. Wastes air every time it's opened, even if pumped down. I suggest we make an airlock that clamshells down on a space suit and leaves the minimum amount of room between suit and lock for air to be reclaimed from. You could have banks of...
  21. Narayanan KR

    A motor design to defy Lenz' law?

    1. The two rotors (purple, green) are electricaly isolated but mechanically fit to rotate along same axis 2. The motor action on the left side rotor will move the armature set, this will produce currents in right side rotor that will pass via a variable load. 3. do you see the magnetic fields...
  22. K

    Design a automatic locking mechanism for two concentric cylinders

    How much force required to pull the actuator pin from the solid cylinder Weight of the solid cylinder is 15kg And angle of inclination 30 , Coefficient of friction 1.5
  23. Alfred0812

    Design of plate heat exchanger

    I am currently working on my college project about the design and optimization of plate heat exchanger. However, i have no idea where to start the project. Here is my first thought: - I set the hot and cold fluid to be water, 90 degC for the hot inlet and 30 degC for the cold inlet. - 50mm inlet...
  24. M

    Engineering Design of Mechanical Systems

    I'm looking for a textbook on designing mechanical systems with multiple machine components. I'd like to study both rigid and non rigid dynamic systems. I'm open to studying systems composed of any mechanical component. In particular, I'd like to learn 1. draw accurate Free Body(FBD) and...
  25. M

    Designing a Safe and Simple Enrichment Object for Elephants at the National Zoo

    Hello! I am a civil engineering student and have been tasked with creating an enrichment object for elephants at the national zoo in DC. I don't know much about pulleys, and am wondering if there are some mechanical engineers out there who could give me some hints on how to achieve this! My...
  26. GetLastError

    Need help with toy design (linear + radial bearing)

    Hi, I'm building a toy and I'd like it to spin around a vertical shaft but also move freely up and down while it is rotating. Also, I'd like that the rotating body will get spinned using a gear which will be positioned in a fixed location on the shaft (at the bottom) while the rotating body...
  27. H

    Free online antenna design software?

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  28. A

    Best design for a 300 watt permanent magnet brushed DC motor

    I have noticed there are a few designs for permanent magnet brushed DC motor, but I can't seem to find the benefits and downsides of either one. The first one (first attachment) uses three electromagnets placed on a triangular rotor. There are two arc permanent magnets on the outside. In this...
  29. Weightofananvil

    JFET, Mosfet, BJT Design Question

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  30. A

    MHB Master algorithm design and upper bound proof

    Hello, I am currently preparing myself for exams and I have a past exam question which I can't solve. This question concerns online learning and the following picture illustrates it: Is anyone able to help me out and propose a solution to this question?
  31. K

    [Cam Design] Calculation of torque required by cam shaft

    Hello all, I am trying to figure out how to calculate the torque on a cam shaft. Say we are looking at this cam and cam follower: If we know that the total force downward caused by the cam follower is, let's say, 50lb, how do I determine the torque required of the cam shaft to rotate the...
  32. ltkach2015

    Alternative Methods vs Iterative Design — Control Theory

    QUESTION (2/2) 1) What are some alternatives to iterative design in control theory? 2) I have a certain plant transfer function PTF(s) that is higher order than two and non-unity numerator. I want certain characteristics such as a certain damping ratio (zeta). So I want approximate it as...
  33. A

    Design a Venturi Pump with Compressed Air and Water: Feasibility & Parameters

    I am trying to develop a Ventury https://www.physicsforums.com/javascript: Pump using Compressed Air a d Motive Fluid and Suction Fluid is Water from Shallow Well. Compressed Air parameter is 6CFM Air at 7 bar using 2hp Motor & Compressor set, and required Suction Lift is about 5m. Discharge...
  34. D

    I Are Classical Design of Experiments Models Too Limited for Modern Needs?

    I need to build up knowledge about Design of Experiments and have a fundamental question about the real goal of DoE. Most classical texts start with discussing in considerable detail full factorial design plans where each factor only has two levels. The underlying statistical model is...
  35. D

    Design of a Lightweight Waterproof (IP 67/68) Winch

    Hello, I am currently designing a lightweight waterproof winch system using off the shelf electrical or hand winches. My problem is that most electric winches that are waterproof are too heavy (design weight limit ~10lbs) and have a much higher force rating than needed (design max force ~500...
  36. A

    Design Problem Lightweight Plastic String for Zipper Seams

    I need a light weight plastic material, like a string that is no more than 1/8 inch in diameter, that can be sewn into fabric alongside a zipper and spring open when the zipper opens. I would greatly appreciate any suggestions anyone is able to give. I have been trying to solve this design...
  37. R

    Designing a High-Gain Differential Amplifier: How to Meet Specific Requirements

    The figure shows a differential amplifier with a differential input vid = (vin_d_pos - vin_d_neg) between the bases of Q1 and Q2, and an output (out) at the emitter of Q4. I have to Determine R1, R2, R4, R5 and R6 so that the following requirements are met: R 1 = R 2 Av = vout / vid = 100 [V /...
  38. Hassan Raafat

    Engineering Design a clipper circuit with a specific output

    Homework Statement Homework Equations Clippers equations The Attempt at a Solution I knew that we will put a two diodes( with a dc battery {2.3 V} series) parallel to each other in opposite directions .. but what meant by gain is 0.95 ?
  39. serenahalterman

    Pressure Vessel Design Question

    Hello, I am replacing an existing ASME Section VIII Division 1 column. The U-1 states it is designed to 240psig @ 650degF, but does not say anything about being designed for vacuum conditions. The SIS for the column states that it is safe to operate under full vacuum. The SIS is not a code...
  40. bpcaddy

    Automotive Crash Test Software for VW Rabbit Car 1981

    For my senior project i plan on litening a vw rabbit car. 1981. Any software that i could uuse to model the care and provide great data on how i could improve the safety after i cut it up to lighten it? Thinking adding roll bars or something.
  41. J

    What is the Optimum Thickness for a Thermal Container Design?

    Hello everyone, first of all, thank you very much for reading. I have to design a container (100 mm of height and 80 mm of interior radius of XPS) to keep a cryogenic mix (water and salt ice) at -15ºC at least for 40min. And my problem is to calculate the optimum thickness of XPS. I've been...
  42. MdAsher

    Design and Fabrication of a scaled down deLaval nozzle.

    Greetings Everyone, I am lookin forward to design a simple deLaval nozzle to achieve supersonic velocity in lab. I do not want to follow the cfd method or any other software method as of now. If someone could please guide me with calculating the various design parameters of the nozzle like...
  43. AndroidX7

    Exploring An Innovative Analog Clock Design: Can Gravity Affect Time?

    So I have no form of engineering education, but I had a hypothesis on an analog mechanical clock being able to account for the effect of gravity on time with a form of super-sensitive weight and scale system to control speed. Has this been done? Either way, any thoughts on the matter?
  44. Turbine

    Optimizing Pin Diameter and Column Thickness for Hydraulic Press Design

    Hi guys, Working on a 50-ton hydraulic press design using a standard H-frame design, like this: I'm working on the design of the vertical members. Similar to the photo above, the verticals have 1.25" diameter holes drilled for pins that support the horizontal bed. The problem: while...
  45. C

    Friction Hinge Design: Calculating Bolt Preload and Torque

    Hi, I'm looking at a friction hinge design problem. See the image below for details. Looking through a machinist's handbook (pg. 1495), I get a few equations for fastener preload and wrench torque. T = k * Fi * d, where T is wrench torque, Fi is preload, and d is the nominal bolt diameter, and...
  46. G

    Hi everyone. My name is Garreth.

    I work in the mining industry, focused on the development of solutions related to environmental protection. Although my background is in Natural Science and Ecology, I have a passion for physics and engineering! I am always interested in expanding my knowledge and ability to design and...
  47. siansoft

    Designing a Pneumatic Filling Machine

    Hi All I'm designing a pneumatic filling machine and I'm looking for this parts in the photo attached so please can anyone knows where can i found it? Thank You
  48. C

    I'm wishing for a miracle -- Advice on my senior design project please....

    https://www.reddit.com/r/EngineeringStudents/comments/4213b7/my_worst_fear_has_finally_come/ Hey guys, as shown in above link, I've explained my almost no engineering knowledge and no experience in design project, which put into an intense anxiety attack. I really do not want to trouble my 2...
  49. A

    How to design an impulse input in Matlab Simulink

    Homework Statement I would like to know a way to design an impulse input in a Matlab Simulink model. I know there are step input and ramp input blocks but there is no impulse input block. Homework Equations The Attempt at a Solution If any working is needed please let me know
  50. C

    Design of experimental device for sugar monocrystallisation

    Hello, I will be conducting an experiment to create a sugar monocrystal, the device I will be using (apologies, English is not my primary language therefore I do not know all the proper terms) will be modeled and influenced by the one described in the paper "Soft-sensor for industrial sugar...
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