Design Definition and 1000 Threads

hello everyone! so as the title suggest, i wonder if anyone would have any idea to design a simple experiment to determine the bending strength and torsion of a plastic ruler. it doesn't need to be extensive, as the value of the strenght itself isn't important. i just want to know e.g how...

The above (top) design is one for a adjustable regulated voltage using an IC. The bottom schematic is the actual design of the IC regulator. My question is, am I missing an obvious way to derive the relationship for Vo? How does this design work, anyway? I figured it had something to do...

Background: I own a lake marina that rents balls for house boats to tie up to on a permanent basis. The boats range in size and weight for 45' to 65' and weight from 2,000lbs to 15,000lbs. The balls are on a grid pattern 9 balls wide by 10 ball deep and 120' to 140' cabling between balls in all...

I desire to build a box that is sound proof that would be only slightly larger then my head, which I could scream as loud as I possibly could, yet the outside world would barely be able to hear, or not be able to hear at all (as little as possible). I have almost no knowledge of physics (only an...

Hi, I want to design an ADC with these specifications: Fin = 20MHz BW= 20MHz ENOB > 4 Power consumption P < 1mW Could anyone suggest me some ADC for this kind? I have searched a lot in IEEE but there are only two ADC with SAR ADC and time-interleaved ADC. The ultralow power consumption...

I wanted to design a wheelchair that can move without the use of the arms. Instead I wanted to design a chair that can be controlled using a person's body weight, like a segway. Apart from using micro-sensors and computers like a segway does can anybody think of another way of designing a...

Error in title. I meant refracting. At every transition between air and glass it seems to me like there would be some reflection. Each photon it seems would have a certain probability of entering a lens and reflecting off of both of the lenses interior surfaces and then continuing on into the...

I am currently in the process of designing an end-plate for a heat exchanger. I know I can do what I am about to ask with FEA, but that is not feasible right now. Here are the design parameters: Shell and tube HX, Max operating Temp=1100 F, 59 1" SS 304 Tubes, staggered pattern, 12" Shell OD...

This is about mechanical engineering I was told that production/manufacturing engineers earn a lot less than Design engineers, is it true?

Hello all, New here. Hopefully I'm following the guidelines by posting here. So, I am in need of some help in analyzing a stand that I am designing. It has an unusual arch in the middle supported by four members; together they make a tire stand. My tire is 40inches in width. And the stand...

Homework Statement Let f(x3; x2; x1; x0) = (y1; y0) such that y1 = 1 if the number of 1's in x3x2x1x0 is even, 0 otherwise, and, output y0 = 1 if the number of 1's in x3x2x1x0 is odd, 0 otherwise. 1. Implement f with four 2-to-4 decoders. 2. Implement f with a 4-to-1 multiplexer with selection...

Hello people, I am interested in tutorials about coil design for Maxwell 3D. If anyone have good material or knows where to find it, let me know. Regards,

Greeting. This is my first thread in engineering zone. Pleased to meet you all As the topic said. I want to ask about how possible to make animal powered vehicle for animal Or simply said, can we create bicycle for animal? I just think that, Human walk is low efficient compare to bicycle...

I want to sample exhaust gas just behind a Catalyst. The problem being the gas varies across the area of the brick so a normal sample probe could read high or low. The general idea is to use a tube with holes in across the area of the brick, however I'm not sure what size to make the holes as...

A mechanical design question, just wanted to pick your brains about a project I'm working on. I have a fixture that houses a magnet, when an operator loads a part with a screw the magnet jumps and a thru beam on the magnet detects that a screw is present. Without a screw (below) the magnet...

Hey...I was trying to design a practical of mine...There is this question where I am supposed to design a tuned RF Amplifier with gain 100 for a frequency 720KHz with BJT. I know that I will get frequency with LC tank circuit but the gain is a different story. I have searched 5-6 books and am...

Hi. I am currently working on a scissor lift design. I'm having some trouble deriving the equations for the actuator force for some reason. Think I'm getting blind on this ATM or something :P. Anyways if someone could help a bit id appreciate it. [I have derived equations I'm just not sure I...

I am doing an undergraduate course in Electronics in India. My line of interest is in Electronic design. Can anyone kindly suggest me some part-time or full time courses in Electronic design and if possible the job potential too. Thanks in advance KRISHNA

I was hoping to get some perspective from practicing engineers on the difference of a career in design making stuff, or analysis ( performing FEA, CFD etc on designs). I am in a rotational program and have some flexiblity. I ask because it appears these are divergent choices and going down one...

What would be the prerequisites for an operating systems course or for a compiler course? I am well-versed in C programming and digital circuit design but have very little knowledge of computer architecture. Would I be recommended to go through a text on comp arch before starting a text on...

I read on the Mars One website that Bas Lansdorp (the director of Mars One) will talk about the design of their Martian habitats during the ISDC conference in San Diego, California next Thursday: http://mars-one.com/en/mars-one-news/presentations-events They also expect to start building a...

Hello experts…i am new in the RF field and i need some help… So i have a double balanced mixer (ZAD-6+ of Mini Circuits) that need +7dBm Local OsC power and 30MHz Loca.osc frequency. At the time i use signal generator for l.o How can i make a crystal oscillator with these parameters? Can...

hi: i designed an active low-pass filter,but i don't know if it correct method or not i want fc=200 Hz and n(order)=4. i use this method: by let C=100 nF and use this equation "fc=1/(2*pi*C*R1)" i get R1= 8 Kohm,R2=R1 this is for one stage to get filter of 4 order,i repeat that...

(I have trouble in finding the stroke length and fuel flow rate) From Heywood,E2.11 You are designing a 4 stroke CI to provide a brake power of 300kW,Naturally aspirated at its max rated speed.Based on typical values for brake mean eff.pressure(bmep){700kPa to 900kPa} and max mean piston...

Hi guys, Just wondering if there Is a way in multisim to design your own components from scratch? basically starting with the input and output pins and you fill in the gate logic on the inside. Im designing an old school binary-BCD for 12 bits. I've got the theory all figured out, and I...

I am trying to design a spring given the following measurements: Spring Stiffness is 400N/m or 295 ft lbs Outer Diameter of spring is 0.25 in Free Length is 3 cm or 1.18 in Load is max: 5lbs I am having trouble with: Calculating the Spring Diamter so as the spring is not over damped...

hello folks, I am in mechanical stream & am working on a project of VAWT of power 300 watt. I found a link where i can calculate power output for different parameter. Here's the link: http://usvawt.com/cgi/windpower.cgi where i took height as 2m and width as 3m. Now need to design...

Hello, I am needing help with some calculations for my project. I have to design an electric Car design and have to include some calculations. Given the maximum speed of the car is 2Meters per Second and the the mass of the car is 1.45kg: Calculate F And how do i calculate the torque at the...

I have been reading about coil design and I have a question. Is there any specific reason a coil design should utilize the entire winding area? I keep reading about this in different literature but none of the literate i have read explains why.

I'm a programmer but weak on hardware so I'd appreciate your help. In a novel I'm writing there are about one hundred underground cities housing one million people in the US; the rest of our population is dead. Somewhat smaller percentage of survivors in Europe and Asia. We have several years...

I'm a retired engineer who lives on a sail boat. I'm tired of frequent replacement of my flags that tatter rapidly as they flap in the wind. I would like to suggest this as a challenge to other engineers. How can we design a tatterproof, flexible and affordable flag? I added the word...

I am in a high school Precalculus class. We are about to have a project where we build bridges with PVC and twine. The goal is to hold as much weight as possible. For this project, I believe we will be given 28 feet of PVC, a roll of twine, and 5 or 6 days to design and construct our...

Hi everyone! Design of electrical systems for buildings is the field I want to engage in the future. I have already basic concepts learned about this. But I want to improve myself in this field. I am looking for a reliable and organized reference. Please help me choose the book/reference I...

My car is just a plain green Mazda 2, and I'm starting to see a lot of those around. I wanted mine to be different somehow, plus the plain green is getting kinda stale. I was wondering if anyone here has had any experience with getting a design painted on their car. I have some questions about...

I search information about design the software and the hardware of controllers especially servo controllers. I have several questions about this subject and I will glad if you can write your opinion and add some relevant links. A. I want to understand these things: A.1. What is servo...

I have a FBD I'm not quite sure about. I attached what i have along with the original picture. 2 pin supports plus the other one on the hydraulic jack. How does it look? Here's my problem: The chute of a concrete truck for delivering wet concrete to a construction site is shown. The length of...

Homework Statement I have to design a scale to weigh something under 1kg and all am given is a yard stick, 10 ft of fishing line, a 500g known standard mass, and a protractor. Use an angle measurement for weight. Don't just balance weights on a see-saw Homework Equations - The...

This is for a anechoic chamber for testing the exhaust noise from a particular engine, it will just be an engine test cell with the dyno in an adjacent room. As the dominant noise from an engine is the engine itself and the exhaust, how would one separate them? also is there any info on where...

Hi experts, I wonder anyone of you have an idea on whether we can include a discrete component (specifically a capacitor) into an "Ansoft Maxwell 3D" eddy current design. Little more description: I do have a specific eddy current design with a coils. I need to add a series capacitor and...

Hi all, I am having trouble finding a website/researching to find more about how I can improve this system: http://www.waterfortheworld.com/file...ion_Manual.pdf SPECIFICALLY I need help to think of how to have a cover on the filter or have a cap/nozzle on the hydroxide solution-if it is...

Hi all, Need help determining what size diameter for some pipe. I just want someone to check my calculations, hopefully they're okay. I attached a quick sketch of the set up. Here are the knowns: Qmin = 4000gpm ΔP = 32psi L = 65ft e(roughness of commercial steel pipe) = 0.00015ft...

Hi i am currently doing my dissertation in which i am designing a vertical axis wind turbine design that is a modification of that of a savonius design. A major problem that i am having is being able to predict the torque value of torque for my design in order for me to then predict the...

i want to design a diode circuit where the Vo vs. Vi looks like this: Vi between -2 and 2 Vo = Vi Vi between 2 and 4 Vo is a linear with slope 0.5 Vi between -2 and -4 Vo is a linear with slope 0.5 Vi>4 Vo=3 Vi<4 Vo=-3 how can i do this?

Homework Statement The memory components in a personal computer require voltages of -12 V, 4 V and 12 V all with respect to a common reference terminal (you can assume this to be the ground). Design a circuit to achieve this if the total power supplied to the divider circuit is 80 W and the...

Hey Everyone, I'm a mechanical engineering student and I was wondering if there was any good book regarding IC Engine design; which includes timing belt design, camshaft, crankshaft, rocker-arm, pump design etc.. a whole in one package that design engineers use for designing ic engines...

I am planning to install a Solar system of 6KW of electricity output enough for a water pump (submersible) and a small home. I need help in designing a mounting which can hold upto 24 solar-panels (20kg each) at a height of 6 meters from the ground, and I also need to make an adjustment...

Hi, Is solid state device physics a must learn subject to design analog circuits. -Devanand T

i'm looking to design a generator, can someone just help me out, the following are the main criterias: It'll have a power rating 30KW RPM like between 120-200, so basically its a low RPM design; i plan on using Carbon fibre for all the components on the rotor other than the power generating...

hello everyone. I am in desperate need of help from some mechanical design/materials engineers/students. I am an Electrical/Electronic Engineering student currently completing a project and require assistance on some mechanical design issues. I have searched numerous websites and books...

Problem Given the power that is needed to be output by the capacitor - P the length of time that the capictor must give off that power - t the maximum operation voltage that the capacitor can operate at- V the dialectric constant of several materials - ε the breakdown field of those several...