Design Definition and 1000 Threads

  1. S

    Which Frequency Response Graph Correctly Represents a Band Reject Filter?

    Homework Statement Homework Equations The Attempt at a Solution [/B] Which is the correct frequency response graph for this question? The first graph or the second one?
  2. satyadangin

    How to design canal to reduce stream temperature?

    If i have atm temperature around 32 deg Celsius, volumetric flow 6000m3/h, fluid temperature inlet 47 deg Celcius. How to get minimum possible dimension for my canal if its maximum possible length is 180 m and fluid temperature outlet at least 40 deg Celcius?
  3. J

    Engineering Designing 3-Stage Async Counter & Logic Circuit in PSpice

    Homework Statement The block diagram of FIGURE 3 shows a three-stage asynchrononous counter that is used to count a series of randomly occurring input pulses. The ‘Q’ outputs of the counter are used to drive a logic circuit that gives the output shown in TABLE 1. (a) Design the counter using...
  4. _maxim_

    A Best coil design for homogeneus NMR RF pulse on liquid discs

    Hi there, we have a NMR spectrometer equipped with a standard bore 54mm cryomagnet working at 14.1 T (600 MHz Larmor Frequency) produced by Oxford. I would implement a special probe capable of generating a RF pulse and reading a NMR answer from a sample that is not standard for such...
  5. Narayanan KR

    Dynamo design with regenerative back mmf

    In the above presented dynamo design, three snapshots taken during three instances during the rotor running. In fig 1 the approaching magnet builds an induced voltage across the coil, however the circuit is still open, hence no current flows. In fig 2 when the rotor reaches TDC (top...
  6. Sanchayan Ghosh

    How to further metrology study from machine design approach?

    Hello, I have metrology in my 4 semester in Bachelor's of Engineering in Mechanical Engineering. However, the books that we get (Engineering Metrology, R.K Jain,) give only a brief principle of how the instruments work. I want to further my study of this subject with an intention to design...
  7. maearnie

    Outdoor Antenna Design: Basic Guidelines & 70 MHz TV Station

    What i need are the ff: basic guidelines on how to create an outdoor antenna (you can send links :)) the most suitable type of antenna that can receive 70 MHz tv station frequency. The antenna will be mounted less that 3 m from the ground. computations that i need to know (you can also send...
  8. S

    Ultraviolet Laser Beam Shaping With Constraints

    Homework Statement Homework Equations Lens equation 1/f = 1/d_o + 1/d_i Minimum Gaussian beam spot 2*w_0 = ((4 * lamda * F)/(pi * D)) Where: w_0 = beam waist (half beam diameter) lambda = wavelength F = focal length of lens D = diameter of incoming spot Don't forget to match units. Let...
  9. L

    Exploring the Applications of CAE in Product Design: A Scientist's Perspective

    Hi everyone! I am a soon-to-be graduate of the Technical University of Munich and work in the field of Computer-Aided Engineering (CAE) – looking to exchange experience and ideas on CFD, FEA,Thermal Analysis and their applications in product design!
  10. Nikhil N

    Optimizing Gate Drive for High Voltage EFT Generator Design

    I am trying to make a EFT generator in low cost which can generate bursts specify by IEC61000-4-4. The circuit which I am working on is given as below. This is for making a high voltage of atleast 400V. I got this design from a paper. But it is not mentioned the values of R1 and R5. I am not...
  11. NihalRi

    Underground living: Which project idea is better?

    Hello, Physics forum community.I have a project for an intro to engineering class in which I must design a system to solve an environmental problem. This class is only an introduction so I'm not sure how detailed and specific our work has to be. I must have been feeling very sci-fi at the time...
  12. Ridzuan

    Acceleration resistance in crane design

    Hi everybody Does anyone familiar with this equation? Acceleration resistance, = {(load MOI/mech. efficiency) + (motor MOI) x rpm^2} / {3.65 x 10^5 x acceleration time} = {(kgm^2/ƞ) + (kgm^2) x rpm^2} / {3.65 x 10^5 x second} = final value unit is in kilowatt (kW) It used to calculate the...
  13. Buggsy GC

    Ideas for a catapult design for an engineering report

    Afternoon every one. I am a first year engineering student in NZ, For my midterm break report I have to design and make a catapult that can meet these specifications. - hit one target within a 0.1 m radius of a target that is 1 m away horizontally from the base of the model catapult. - hit one...
  14. Ridzuan

    What is the formula for calculating moment of inertia in RTG crane design?

    Hi guys... appreciate if somebody can help me on the design calculation of the RTG crane... I am stuck to understand the following formulas, used by MITSUBISHI to calculate as follow: 1. Moment of inertia for hoisting = [Lifting weight (kg) x Lifting velocity^2 (m/min)^2] / [π^2 x motor rpm^2]...
  15. P

    Nuclear Engineering: PhD vs. Masters for reactor design

    I had read a few helpful forums on the pros and cons of going for a masters vs. phd in nuclear engineering. However, I am still confused about one thing. I am considering pursuing a career in reactor design (fission or fusion, will likely make another post to discuss this). Here are my...
  16. H

    Design Calculation and Sizing of a 500KVA Transformer

    I want to design the installation of a 500KVA Distribution Transformer to supply a neighborhood in Nigeria. The Existing National Grid voltage is 11KV. I want input from you guys to add to my sizing/costing. Inputs: 1. Sizing of XLPE Cable 2. Sizing of Transformer HV Protection ( Current Rating...
  17. Kelsi_Jade

    Design a series RLC filter for 10kHz

    Homework Statement Design a series RLC filter for 10kHz using an 0.01mF capacitor. Homework Equations / 3. The Attempt at a Solution how would the circuit actually look if drawn out here? [/B]
  18. Prateeksha Sharma

    How to design surface roughness model using CST?

    I am working om multilayer hybrid plasmonic waveguide (Si-SiO2-Ag_SiO2-Si). I have to see effect of roughness on propagation length and other parameters. So in reference to that I am having some doubts: 1) I use CST microwave studio for numerical simulation. I am not getting any direct option...
  19. D

    Designing Shear Link for Multi-Point Loads - Hey Guys!

    Hey guys, I know this is a bad question but I would love to know how. Usually, in the examples, the loads are given as UDL where you can to find same reaction at both ends of beam. What if the beam loadings are with multiple point loads, (5 or 6 point load) and the reaction of the beam at both...
  20. The_Inventor

    Circuit Board Design: Basics of Designing a PCB

    My background is in physics so I have a very basic understanding of circuit design. I was just wondering, If someone were to design a printed circuit board (from scratch) how do they know that it will function the way it should? and also how do they know that the printed circuit board will...
  21. P

    How do I design a Permanent Magnet Synchronous Generator?

    Hi, I'm trying to do a very simple analysis on Simulink where I am applying a speed to a Permanent Magnet Synchronous Generator with a purely resistive load. I'm not familiar with PMSGs so the results I'm getting don't really make any sense to me. Could anyone go through some simple design...
  22. Borg

    Computer Programs to help design circuits to hook up to a Raspberry Pi

    I would like to start building small electrical projects but it's been a very long time since I studied circuit analysis in college. I figured that there are probably some computer programs that would help people like myself to design simple circuits. A quick Google search led me to this site...
  23. T

    Switch Mode DC-DC step-down PSU design troubleshooting

    I am working on a switch mode psu in step down configuration with the key components being: LM2592 (adj) http://www.ti.com/lit/ds/symlink/lm2592hv.pdf 530-PC-24-1000 http://www.mouser.com/ds/2/643/PC-594199.pdf GSIB-25 http://www.vishay.com/docs/88646/gsib25xx.pdf Using a slightly modified...
  24. S

    Design a flyback transformer for charging defibrillator

    how can i design a flyback transformer for the controlled charging of defibrillator capacitor(high voltage). The charging is controlled using PWM which controls the transformer switching using a MOSFET.
  25. J

    Can I design a horizontal cylindrical hollow turbine blade

    Hello everyone, I need the following but I am not sure if it is possible or not? I don’t have mechanical engineering background. Please advise me on feasibility of this project and any suggestion would be greatly appreciated. I am looking to design a horizontal cylindrical hollow turbine...
  26. M

    Parts of the design of an aircraft that affect the pitching moment

    If I wanted a higher value for pitching moment due to a change in pitch rate, Mq, what are some design alterations I might make to an aircraft to incorporate this. I am guessing changes to the airfoil or maybe the tailplane but I am not sure what changes you would make to get a desired result.
  27. Tim Allen

    Design Tripod to Support 20kg Mass at 2m: A Student Guide

    Homework Statement I am designing a tripod which is for supporting a mass of 20kg at a height of 2m from the ground. The legs are cylindrical and hollow, dimensions are not set in stone, and would be made from an aluminium alloy. I do not want the legs to be bound at the bottom, they should...
  28. Jhoneine

    Rack and Pinion Design Question

    Hi, I am planning on translating a vertical rack movement to a pinion rotary motion by a human footstep force. Any idea on how to obtain the rack linear velocity theoretically ?
  29. Nikhil N

    Design of CT with ferrite core for reverse operation of CT

    I have to couple noise into data cable(cat5) in common mode. I have done this with a CT of 50A/1A, ferrite core. What I have done is, I connected the S1 and S2 of CT to probe of my signal generator and inserted the cable through the whole of CT(ring type). I got maximum of 380mV in the cable...
  30. Mechanic7

    Hydraulic system - Design optimization

    Homework Statement Hello all, I'm a Mechanical engineer with no prior experience in designing flow systems. I'm struggling with a hydraulic system that I have to design. the number of unknowns is large. but maybe by dividing the system to small sections, a solution can be found. I attached...
  31. Mechanic7

    Water flow system - Design an Optimization

    Hello all, I'm a Mechanical engineer with no prior experience in designing flow systems. I'm struggling with a hydraulic system that I have to design. the number of unknowns is large. but maybe by dividing the system to small sections, a solution can be found. I attached a schematic drawing...
  32. BoeingJet

    Can a Railgun-Powered Ramjet Solve the Challenges of High-Speed Travel?

    Recently, I designed (in my head) a Hypervelocity Passenger Vehicle (just a cool name for really high speed transports). I immediately ran into engine design problems ( I like designing everything stand-alone), since regular jet engines can't get to Mach 8.8 without burning up into flames, and...
  33. T

    Maximizing Efficiency: The Role of Feedback in Boost Converter Switch Design

    I'm looking into the design of the control circuit for the mosfet. If I know the output voltage and input voltage then I can find the duty cycle required. I found this schematic that uses feedback Source https://www.maximintegrated.com/en/app-notes/index.mvp/id/2031 Why would I need feedback...
  34. A

    Nitinol Engine Design: Exploring Efficiency and Power Harnessing Techniques

    So I'm starting to do some tests with nitinol (order about 5 feet of wire just to do some basic tests and get a feel for the material before I go any further). I've seen a few variations on different types of motors that are powered by nitinol and am wondering if they all have the same...
  35. P

    How can I design high-quality EEG electrodes?

    I am looking for a source (or several) on advanced EEG design techniques, in particular how the highest quality electrodes are made. I understand the basic principles of how an electrode works but have no knowledge at all about design techniques. Does anyone know of something that would help me...
  36. T

    How to Design a Donut Electromagnet

    I have an electromagnet device that I am designing and need a bit of help from some of the brilliant people on this site. Here's the problem: I have a disk attached to the end of a shaft and the shaft/disk assembly can move radially (via a spring loaded mechanism). This shaft/disk fits...
  37. A

    How Efficient Is Split-Return Coil Design for Quenching in Induction Heating?

    I am designing an induction heating rig to heat a strip on the surface of a steel sample with repeated quenching, through holes in the heating surface of the coil (shown in the third image). The rig should heat the sample to around 600C in 20 seconds, and quench to 30C in 20 seconds. Firstly...
  38. Erik Bethke

    Optimizing Robot Design: Heuristics for Efficient Performance

    Hello all, I am designing a lay-person-facing simulation that includes robots performing a broad array of tasks. I do not want to create magical can-do-anything robots that collapse all work to be performed to a simple abstraction. Rather, I would like to have relatively dedicated and...
  39. broncoracer104

    Automotive Kayak Loader Design Help Needed: Spring Placement/Weight

    hello, new here but need a hand figuring out a problem that is above my knowledge, i am currently building a kayak loader for myself like the one pictured below, i am trying to figure out where to place the spring and how heavy of a spring i need to help assist the kayak onto my roof, i am sure...
  40. T

    Ideas for refrigerator door design

    Hi all, I just want to throw some ideas and get feedback from the community on refrigerator door design. If anybody notices in supermarkets, etc, the frozen food are kept in glass-doored refrigerators. the prupose of the glass door is so the customers can see if the stuff they're looking is...
  41. J

    Recommendations for Weld Joint Design Books?

    Can anyone recommend a good book on weld design? I'm not looking for a general textbook on welding. I want something that specifically targets the design of joints and weld choices. Something like the welding chapter of Shigley's Mechanical Engineering Design, just much more in depth.
  42. Kaura

    Engineering Software for Mechanical Simulations

    I am a first year Mechanical Engineering Major I am wondering if there are any good computer program that I could use to simulate the physics and properties of potential designs The other day I saw something about Da Vinci's famous cryptex and this peaked my interest into designing and building...
  43. M

    Engineering Nuclear engineers who work in design

    Hi, do large nuclear power design companies ask for high GPA/Average ? companies like terrapower Westinghouse...? Is a successful engineering career linked with high gpa/average ?
  44. Nikhil N

    How to test CST design studio for analyzing data errors

    Hi.. I want to know how can we specify the data(electrical) passing through cable that we are designing in CST design studio to test the effect of EMI on the data passing?
  45. Z

    Automotive Calculation of energy storage system for PEV

    Hi, My teacher asked that i should design a efficient energy storage system for a plug-in electric vehicle. I have no idea how i can use some equations for designing this type of car. The requirements are in below; Test cycle range: 140 miles Test cycle energy: 260Wh/mile at the output of the...
  46. person123

    Rotating Friction Discs For Project Design

    The situation is part of a mechanism I have been working on. It is used for a bicycle to automatically store and release energy with a spring. It is somewhat similar to a car clutch. Homework Statement Two friction discs are rotating with different angular velocities and different torques. The...
  47. C

    Advice for the design of an automatic door opener

    Hello all, I need to design an automated trap door opener incorporating a motor and at least one of the following: gears, springs, or power screws. It is 36 inches wide and 48 inches long. It is hinged along its width. The door weighs 60 pounds. When closed it is flush with the floor. It must...
  48. bigfooted

    Engineering Aircraft engine design books from 1900-1920

    I'm interested in the knowledge that was available to aircraft engineers in the period 1900-1920. specifically the thermodynamics and mechanical engineering knowledge generally available, like in how much detail were the calculations on the performance, or the cooling of engines done, how...
  49. pairofstrings

    Is the design of Raspberry Pi stored in a memory component?

    Hello. I have a following C programming language code that blinks an LED ON and OFF. #include<bcm2835.h> #define LED RPI_GPIO_P1_12 int main(int argc, char **argv) { if(!bcm2835_init()) return 1; bcm2835_gpio_fsel(LED, BCM2835_GPIO_FSEL_OUTP); unsigned int delay(1000); while(1)...
  50. L

    Heat exchanger and cooling towers design

    I was wondering all the assumptions I need to make regarding a design for a heat exchanger and cooling tower design from a IC engine testbed. Each engines average output is 55kW and the water jacket temperature is 80 degrees (C) and has to be cooled to 65 degrees (C). The ambient atmospheric...
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