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. theycallmevirgo

    Hexapod Leg Design: Optimizing a 3D Printed Femur Assembly

    The below is a leg assembly from the Antdroid open source hexapod robot (https://github.com/antdroid-hexapod/antdroid). The "femur" assembly connects the servos at S1 and S2. It is comprised of two side plates connected by cylindrical struts. Being fundamentally lazy, I prefer to redesign this...
  2. Shreya

    Design a combination of Capacitors

    My attempt was this: The textbook answer was: Is my approach wrong?
  3. P

    Engineering Practical design of an inverting Schmitt trigger with noise tolerance

    This is regarding the positive feedback of an Op-Amp and the inverting Schmitt trigger. This is a typical inverting Schmitt trigger - I need to design the Schmitt trigger such that I have a threshold voltage of around 2V, when my ##+-V_{CC} = 8V##. The slew rate of the Op-Amp allows for a...
  4. theycallmevirgo

    Maximizing Output Power in DIY CNC Laser Cutters

    I was thinking of an improvement to the "traditional" diy cnc laser cutter that might entail some extra travel for the laser and/or additional (stationary) mirrors. Is there some way to calculate how this will affect output power? Many thanks in advance Joe
  5. P

    Engineering Alternative design for a CE-CC cascade amplifier

    Here is a common CE-CC cascade amplifier- Here, the output of the emitter amplifier is directly connected to Q2, without any coupling capacitor or any voltage divider bias. This may harm the base-emitter junction of Q2 in case of unwanted output voltage from Q1 collector. But in that case, the...
  6. P

    Misc. Display built with a rotating cube design

    Hello everyone, I want to build a rotating display cube (will be mounted on a wall, those cubes that has shops logos ect..), my problem is that I don't know where to start and how to attack the rotating mechanism. I have a 1400Rpm moteur (and it's a 1m per 1m cube that weights around 120kg-150kg...
  7. AJSayad

    Mechanical/Aerospace Engineering Undergrad Senior Design Project

    Hi everyone, This semester I'm enrolled in a senior design course where the students must fully design and fabricate a project from scratch that solves a problem. I've been struggling to think of ideas, so far I have some ideas on a windmill/turbine and a few electricity generation device ideas...
  8. H

    How can I design a Foucault Pendulum for my university building?

    Hi guys, I think I have persuaded the administration to install a Foucault pendulum in my university building where a high roof and open spaces are available. The thing is I have to project it with design, cost, etc. Those are domains which I don't have much expertise as a simple physicist. So...
  9. Nickf_Zar

    How Do You Calculate Torque for an Anchor Type Agitator Motor?

    Hi All, I must calculate the torque and for an agitator motor. An anchor type agitator/scraper, removing crust off the edge of a tank. My instinct is the max or startup torque will be = (Moment of Inertia) x (Angular Acceleration) + (Drag force of the submerged impeller)* Max radius +...
  10. DustyLemon

    Misc. Is a One-Piece Injection-Molded Plastic Lock Possible?

    Hi there, I've been trying to think up a mechanical design with limited success. Before I divert more time to this I thought I'd see if anyone knows if something like this already exists, or is commonly utilized. I'm basically trying to come up with a lock system whereby it is pushed down to...
  11. R

    Design a linear phase low pass filter

    Design a linear phase low pass filter whose specification is:1) Maximum tolerance in the passband equal to 0.01% (linear) in the passband;2) Cutoff frequency at ω_c = 0.3π and transition band at 0.05π;3) Minimum reduction of the 0.95 rejection band.
  12. KyleGranger

    Basic MOSFET Thermal Design: Parameter Calculations from Datasheet

    I would like to be able to determine the current through a device for a given junction temperature. I am looking at a datasheet and notice that it gives the device power dissipation with different case temperatures. Since the maximum junction temperature is 175 C, I believe that means that lower...
  13. fsonnichsen

    Seek Open Source Web Design Software for Serial Controlled Systems

    I am hoping this forum may be a good page for this question. Not sure where else to post. I have been asked if I can write a user GUI to control a system that we build--the system is made with the fairly common electronics board designs and PIC MPs and presently is controlled from a...
  14. Vossi

    Verifying a circuit design with voltage regulators

    Need help verifying if this circuit design and use of elements is correct. The goal here is to run a 3v motor, hence I need to make the use of voltage regulators for a constant 3v energy to transfer.
  15. H

    Building a Two Omni Wheel Robot: Questions & Answers

    Hello! I have a somewhat complicated robot project that I've simplified here to hopefully get a quick answer. I want to build a robot with two omni-wheels that looks like the following (not drawn to scale), where the black is the omni wheels at 45 degree angles and the blue is the robot body...
  16. Janus

    What were the early design concepts for the Apollo program?

    In the TIL thread, I posted a link which had a number of imaged of an early proposal for the Apollo program. I thought I'd use them to do a few renders of what it might have looked like, and point out some of the major differences from the final version. First, what the craft in fully...
  17. diyhome

    Design Wooden Gate & Hinges for Durability & Wind Resistance

    I'm in the process of repairing a wooden gate and would like to replace the wooden posts with metal ones, to help avoid the amount of sag over time. Both the gates are 59 wide by 50 height weighing about 25-50 pounds each(I don't have a scale to weigh it) made from pressure treated wood. I want...
  18. N

    Physics Physics Degrees and Semiconductor Industry (IC Design?)

    Hello there, im a physics student from Germany and currently in my second semester of a Bachelor of science. Lately i have become increasingly interested in woking in the Semiconductor Industry and I am currently reading the book "But how do it Know" by J. Clark Scott and i think it is really...
  19. a61098417

    Gearbox design-Is this design possible to make the output shaft thin?

    Is this design correct?
  20. M

    Engineering Axial Flow Turbine Design Question

    Hi, I was attempting the following turbo machinery problem and am getting quite stuck on the first part of the question. The question is: A design of an axial flow gas turbine stage is conducted for the following parameters at the mean radius: Stage inlet stagnation conditions: ## p_{01} ##...
  21. DaveC426913

    Optimizing a universal joint design

    First, a caveat: this is one component of a project, which is difficult to describe without quite a but of digression. If my descriptions seem illogical, it may be because I haven't described the function of the component in its proper context. I assume it will take a little bit of...
  22. A

    Query about my Computer Science Project -- VPN Design

    Hello Everyone, I am a final year B.tech student and I am looking for some latest computer science projects for my major project. I am shortlisted one project which is Virtual Private Network, The objective is project demands creating an application that allows users to convert their public...
  23. F

    MHB What Are the Minimum Requirements for Design Loads in Aerospace?

    Dear Ackbach, Please can you help me with this problem: 1. In an axial direction:\ (f_n \geq 27 [Hz] \) what is the minimum natural frequency? 2. Normal acceleration at launch: \ (g_x = 6.5g \) please can you help Regards Floria
  24. D

    Designing a Power Transformer: Tips and Techniques

    We need all the project including all details with schema, If you are talented for drawing the project, please contact me. 50/62,5 MVA, 154/33 kVA
  25. Ameen1985

    Design a compressed air energy storage for a PV plant

    Summary:: Design compressed air energy storage for PV plant [Mentor Note -- Thread moved from a technical forum, so no Homework Template is shown] Hi All For a PV project of 5 kW, we will use a CAES. The preliminary design will consist of a compressor - 2 heat exchanger - Air receiver - air...
  26. O

    How can I design a gear train to meet specific torque and RPM requirements?

    Hello, I'm after some advice/ clarification on some gear train design. This may just be a simple clarification Requirements I have a lead screw which needs to be supplied power by a Motor. This Lead screw must have 140Nm Torque to raise and lower the load, and must turn at 200RPM. The motors I...
  27. Daddahu

    CanSat Parafoil Design Resources

    Hi! Do anyone have any help or documentation how to calculate size, design, etc. For a CanSat parafoil which would hold 300-350g payload? So far I've seen this is quite difficoult (for me at least) to calculate and make. Thanks in advance! Posted by a 1st year upper secundary student in Norway
  28. Helena Wells

    Should a Big Inductor be Added to a Hartley Oscillator Design?

    This is the Colpitts oscillator: When we design a Colpitts oscillator we must set the value of C1 to be bigger than the parasitic capacitance of the emitter base junction. However in a Hartley oscillator we have an inductive voltage divider and I was wondering if we should put a big inductor...
  29. D

    Soldering station fume hood design

    Good day all, I am currently building a fume hood for a soldering station which will exhaust air to the outside world via filtration. As I would like to maintain constant negative pressure inside the hood, even in the event of back-draft from outside due to inclement weather, or one too many...
  30. S

    What is the preheat temperature for the water entering the gas boiler?

    Summary:: I need to know the preheat temperature of the water entering the gas boiler (which i think is the outlet temperature of the cold water Tc,o leaving the heat exchanger) Hi, I'm doing a design project of a hairpin heat exchanger. The problem is: In a public shower, the city water is...
  31. Ntip

    How Do I Design an EMI Filter for a Converter with Only Voltage and Power Specs?

    I am starting the input filter design for a converter and only have the voltage and power specs. It will be the input filter to other converters on a parallel bus, so I could look at the datasheets for those and get some specs there. I do not have any information from the input converter to this...
  32. J

    Please critique my program design

    I am writing a simple program for my wife and would like some critique on some general design decisions I've made. The program will be able to store a recipe she enters (in a .txt file), retrieve a recipe that she had entered in the past, and allow the input and retrieval of ingredient densities...
  33. E

    Elevator Frame Design: Can It Stand Alone?

    Hello there, I am wondering, if I were to build an elevator in a building, is it possible if I build the elevator frame (and rails) without using the rail bracket? The weight of the cart plus the contents would be supported by only 4 steel columns fixed to the ground. I know it is a silly...
  34. K

    Job Skills What next for manual gearbox design engineers?

    Simple questions are sometimes difficult to ask. I am a mechanical design engineer of automotive gearboxes with a UG qualification and 12 years of experience. My core expertise is into gears and special interest in NVH. In the recent years I see the automotive OEMs cutting down research cost of...
  35. Y

    System design for charging battery from turbine alternator

    I am designing a hydro power system that will tie into an off grid solar system. I will be using a 48v carbon AGM battery bank. Will be using the Sol-Ark 12kw inverter/charger, which has 2 built in MPPT charge controllers for solar. Assume the hydro power will be around 5 kw potential, and...
  36. AxeGrinder

    Help with this Brushless Generator Design Please

  37. M

    Construction Homemade tripod tree stump/root puller design

    WHAT: I'm designing a simple tree stump puller. It consists of a tripod made of square (or round, if it's easier) steel tubing with a winch at the top. The cable from the winch drops down, attaches to the stump, then pulls the stump upward. DIMENSIONS: The top of the tripod, where the winch...
  38. FEAnalyst

    Designing a Pallet Chain Conveyor: Calculations and Approaches

    Hi, I'm not sure how to approach the design calculations for chain conveyor. It's rather easy to find formulas for belt conveyor but it's not the same. I also thought about the use of procedure applicable to chain drive but in case of conveyor load is placed directly on the chain (or a pair of...
  39. T

    Calculate the required torque for a cam design

    Hi all, I'm currently designing a cam mechanism. Would like to check how much motor rated torque required for the following design of snail cam ? To ease calculation, i have include some assumed factor as below. Two extreme condition (rotation degree) to compare. What is the motor rated...
  40. FEAnalyst

    Design of welds under dynamic (shock) loads

    Hi, in the books about the design of welded connection, we can find detailed description of calculations for static and fatigue loads. But what about the other type of dynamic behavior - shock ? As an example consider welded parts of the tow hitch used to free vehicles stuck in mud. Of course...
  41. Ntip

    Feedback controller design for boost converter

    I recently started looking into a boost converter design that would be no load most of the time which causes it to operate in DCM. After calculating the duty cycle D, it is dependent on Vi, Vo, L, f, and R. The load R and output voltage Vo are fixed, but I would like to vary the other parameters...
  42. S

    When are Lumped-element models used in the design process?

    Hi everybody, Academic papers in mechanical engineering use often lumped-element (or lumped-parameter) models such as a typical quarter car model. However, books about the (mechanical) engineering design methodologies (such as by authors Dieter, Shigley, or Pahl-Beitz) seem to not mention this...
  43. R

    Pole placement design, Control Theory

    Summary:: Control Theory root equation pole Hi, I ran into a simple question but somehow I can't get it right. My work this far: ## G_0(s) = G(s) \cdot K \cdot \frac{1}{T_I s} = \frac{k}{\tau s +1} \cdot \frac{2\beta \tau -1}{k} \cdot \frac{2\beta^2 \tau}{Kks} = \frac{2\beta^2\tau}{s(\tau s...
  44. H

    Database Table Design for Canadian Electoral Data

    I have been asked by my team lead to create two tables for a database and to outline the rationale behind my table design choices.Table 1 should contain the following columns and be named vote_share: ● Riding Number ● Riding Name in English ● Riding Name in French ● Total votes ● Turnout (votes...
  45. A

    33KV potential transformer design

    I am in a team of designing a 33KV potential transformer. We done secondary turn as 75 and primary turns as 15000 with core cross sectional area of 5000 sq.mm. As per IS standard we need to maintain a accuracy class of 0.2 at 50VA burden but we can't able to achieve it. Someone please help us to...
  46. P

    Engineering Black-box design to create sawtooth waveform

    Hi I received some great help yesterday and i was hoping someone would be able to help me out again today Note: the given equation is very long and would look very messy without being typed in the correct format so I didn't enter the entire thing in the relevant equations box; instead it is...
  47. H

    Stargazing Observations and telescope/microscope design questions

    Greetings, I was sitting around thinking and I began to think about Astronomy from school. We studied telescope design. Optical came to mind. Can a telescope sensor be designed after the human eye. Rods and Cones. It seemed somewhat trivial but at the same time I was thinking our eyes are close...
  48. willDavidson

    PCB design: multiple layers vs heavier copper

    I am designing a board which will have relatively high current. The options are to use heavier copper (4 oz), use two layers (2 oz), or 4 layers (1 oz). Are there any benefits to using one configuration over the others?
  49. B

    2D vs 3D Method of Characteristics for Rocket Nozzle Design

    Hi all, I'm working on programming a simple 2D method of characteristics program to design the nozzle wall contour for a supersonic rocket nozzle. I'm wondering roughly what sort of difference I should expect from a 2D vs 3D method of characteristics program and where I could find a good...
  50. S

    ASME compliance in Pressure Vessel design

    Summary:: Hello i have a question regarding pressure vessel design. As per the required operating parameters for a pressure vessel, i have calculated the sheet thickness for the shell to be 4 mm and base plate thickness to be 25mm. These results are based on ASME calculations and ansys.Both...
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