Design Definition and 1000 Threads

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...

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...

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.

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...

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...

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...

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

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...

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...

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...

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...

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...

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...

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...

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...

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...

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...

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?

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...

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...

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...

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...

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...

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...

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...

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...

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...

Forum, I am an engineering student from Melbourne Australia and I have a simple question related to a literature research project I'm currently undertaking, hopefully someone can help me out. Which engineering or safety standards would a design for a CT or fluoroscopy system, more...

Hello all, I'm an electrical engineering student searching for some advice regarding a mechanical engineering class. I have to take at least one upper level engineering class that's not electrical for my degree and I would prefer to take an ME class to fulfill that requirement. While browsing my...

University physics with lab general chemistry 2 with lab Design class linear Algebra Culculs 2. Does this look like an overload? At times it feels like it is and at times it feels like it can be done. the mechanics course and the general chemistry course both come with labs which is the...

It may be impossible. I was under the impression that phones are designed in such weird ways to try to pack as much stuff into the given volume as possible. But, that could just as possibly be an excuse for not having replaceable/upgradable parts and thus forcing new purchases. Idk. If you like...

i am a beginner and i am learning cmos design technique .. i found this layout (attached) and i am not sure how to decompose and understand it - like what function is it implementing and how.. if anyone can help -----

After reading an article a few of you may have read before, Link: http://www.metropolismag.com/October-2009/The-Making-of-a-Design-Thinker/ There are a few questions I am curious about. Design is not only the creation of prototypes for different machines/parts etc. But it can also be...

Hi All, I am designing a hollow rotating drum equipment which will be filled with specialized media for wastewater purification. I need help to design the shaft diameter for the entire assembly. The Drum will be hollow with a diameter of 1.77 meter and length of 2.5 filled with some kind of...

mechanical design -- cam timing chain versus gear-driven hey all, I am a mech-e student, but I am still in the infancy of my degree, so I haven't really had any courses pertaining to this sort of thing, but having work with cars for a number of years, and having what I consider a strong...

Optimal design, "water-wing" - single oar propulsion Good evening, and hello to you all. As you can see I'm new here, so please go easy on me. A while ago I got to learn about the single oar propulsion system used in southeast Asia. The way I see it this is a principle with loads of...

I am redeveloping a product that literally billions of people use, from every day to at least once a month. I need some help designing the power portion, as I am not an engineer. I am planning on using the GTL ICR18650 3.7V 3000 mAh Lithium Battery because it provides the power needed, as...

Buck Converter Design for PMDC Motor Introductory Notes: The design article followed in this post can be found here: http://my.ece.ucsb.edu/York/Bobsclass/194/References/NonIsolated/Buck/Buck%20Converter%20Design%20Demystified%20606PET25.pdf This circuit will be used for a motor controller...

Design a railway cistern for 120,000 kg of Liquid. It has to be a cylindrical shell on two supports. The cistern is 18 m long 3 m in diameter (inner). It is made of steel with the yield strength of SY= 240MPa. Safety factor of FY= 1.9; Total corrosion allowance, c= 3.0 mm; Welded joint...

Hello I am trying to put together a system - think of it as a mini oven that reaches temperatures of no higher than about 75-80 degrees C but normally up to about 50 degrees. Initially, I'm trying to find out what power would be required to warm a space up to that temperature. I started...

i'm in the conceptual design stage of my e-cycle. my tech reqs : 1. it should have a max speed of atleast 40 kmph. 2. gross weight = 120 kg 3. min range 30 km. Please help me with the following design question. how to estimate the motor & battery power requirements ?

Hello everyone! Could you please explain to me what design stages/phases exist? And in what order are they placed? Is it: - Conceptual Design - Preliminary Design - Final Deign What is "detail design" then and how is it different from the Final Design? After googling, I've got a lot...

Hello everyone Exam tomorrow on thermodynmaics and can only find one advantage for the NTU method of design over the LMTD method which is: The NTU method does not rely on using an numerical iterative solution to find the outlet temperatures of the heat exchanger, which would be the case if...

Hello, We are a solar energy solutions provider and we are looking to explore CSP plants at smaller scales. I would like to understand the design better. Basically a CSP consists of: 1) steam turbine 2) solar energy collectors (mirrors) 3) water container (boiler) I would like to...

Hello, I wish to design the matrix P such that it satisfies the following: P^TQP=Q^T where all matrices are N-by-N. Is it possible? Thanks

Good day! I don't know if they are called Structural design philosophy but, can anyone enumerate(if the list is incomplete) and differentiate the : 1. Ultimate Strength Design 2. Working Stress Design 3. Limit State Design 4. Allowable Stress Design 5. Others (If there are) Help...

Hi There Based on a Vapour compression refrigeration system: Does anyone out there know a good estimate or any real values for the total heat transfer area for the hot and cold sides of a domestic refrigeration system? i.e. the sum of the areas of the evaporator and the condenser. For the...

I've an impeller choice to make for a stirred tank reactor and would love some opinions. Essentially, I've a three level agitator as shown in the sketch I made. RPM is fixed (~85 rpm). My real choice is only what combination of the two impeller designs I choose. Would you go for a pitched...

bridge rectifier design... Can I use the same bridge rectifier for AC as well for DC voltages? My AC mains is regular 265Vac and DC is 40Vdc. How should I choose bridge rectifier? (In other words, what are the parameters I need to check while selecting diodes for bridge rectifier?) Thank...

Hi all, I'm looking for design of steam platens for Rubber curing presses.The steam platens heat the green rubber article while curing.Other mediums such as oil,induction heating are also available,but I'm more interested in design of steam platens. There is one patent available in google...