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.
I need some help with designing a shell and tube heat exchanger for a 100kW rice husk gasifier. The goal is to cool the syngas from 300°C to 60°C, with the syngas on the tube side and cooling water on the shell side. How many shell and tube heat exchangers would be required for this task? Would...
I am among other things a farmer who is getting older and having a harder time using my hands. My current project is to make fruit picking easier for myself. Over the years I have built homes, designed and built aluminum fishing boats in Alaska, Banjo's and guitars.
Hey to all..
I am in the process of designing a ligand for a clarinet mouthpiece for my own use created only out of string material (braided kevlar).
For those uninformed (like me a few weeks ago) saxophone/clarinets are instruments where the vibration of the standing wave through the...
First, this class uses Frank White's Fluid Mechanics textbook. This particular problem is taken straight from chapter 7, which is on "Flow Past Immersed Bodies" and is basically focused on external flow, geometry effects, and boundary-layer conditions. So I imagine that the problem makes use of...
Hello! I am in need of a clock expert. Just a disclaimer, I am vastly unfamiliar with much of the inner-workings of clocks and need some help. I have only built a simple Graham Escapement clock, previously.
I need to build a clock that triggers a single signal to occur three times at equally...
I have a disk traveling on the inner blue track (let's say the blue part is the center of the disk).
I want to push the disk outside (as the disk is traveling in a circle) to the outer track.
The black part is the wall separating the tracks
To that end, I've made some calculations, but I have...
Design the markov model and transition matrix for the given data. Answer the following questions based on the mode.
a) If a person purchase coke now the probability of purchase of coke next time is 80%.
b) If a person purchases pepsi now the probability of purchasing pepsi next time is 70%...
(note: I never studied engineering, but I think I have a good math (and slight physics) background. I'm mentioning this not so you'll go easy on me - if I don't understand something, I'm sure I'll figure it out or find someone to help me decode what you're saying. I'm mentioning this in the...
Normally when designing a retaining wall, you check for failure due to sliding, overturning, and insufficient bearing capacity. However, if I have a retaining wall which is around an enclosed pit, it doesn't seem reasonable to perform the same checks for sliding and overturning (the retaining...
Hello to all.
I am trying to design a ripple free (read as ripple free as possible) power supply (PS) for my DIY DDS function generator.
I am (was) in the possession of the hyland 5v to 12v PS which wrecked due to a stupid action on my side, my bad.
so i was going to repair it, but i found that...
I got these tuning forks from someone.
However, I do not have the resonant box for amplification of the sound. I decided to get it made so that I can experience the fundamental frequency (and other harmonics) more clearly.
I am planning to provide this design.
In summary, the box would be...
I need to design a parabolic dish. Only requirement is that it's 3m in diameter. Everything else can change.
I may seem like a bit confused. That's because I have 50 tabs open about the topic.
First thing is I need to calculate dish gain. If I'm going to calculate it according to this equation...
say for 3.013bar absolute pressure
pressure ratio :
P/Po = 14.7psi/43.707psi = 0.33
which means its chocked flow
now i want to find diameter or area of orifice :
so could anyone help me
For the integrator circuit, I can design the cutoff frequency and the 0dB frequency as required. Using Laplace transforms, the gain is around ##-\frac{1}{sR1C}##, where s is the complex impedance parameter. But, how do I maintain the absolute value of this gain at 10 for the whole band pass for...
Hello Everyone,
I'm planning on designing a model aircraft that would be powered by an Arduino and electric motor. I'm interested in pursuing an aerospace degree and I figured the best way to get a headstart would be be to dive right into a project. This is also probably overthinking/overdoing...
As far as I know, HIV replicates itself at an exponential rate in a base b. For simplicity, let b = 2.
For example, if one cell is infected, then HIV makes one copy of itself (since b = 2). And the cell dies to infect two new cells. These two new cells die to infect four new cells and so on...
Greetings!
I'm a recent ME grad and I'm trying to design a refrigeration system for the first time. I understand most of the theory and calculations (I guess not, cause I wouldn't be here otherwise), but I'm having difficulty applying it to the real world. Homework problems in college often...
The connections are as follows:
The "D" pins are connected to the data bus, the "Q" pins to the device, the "E" control to the block address decoder, the "OE(bar)" to ground.
Am I right?
I have a platform which can lift 600 kg (the platform itself weighs 95 kg so their combined mass is actually 695 kg) at 0.75 m/s up to around 37 m in height at a maximum angle of inclination of 87 degrees. The issue I'm coming across is determining the power required to lift said mass as the...
For a maximally flat three-section coupler, by setting the nth derivative of C with respect to theta to 0 then solving the resulting system of equations, I got C1 = C3 = .0125 and C2 = .125.
I’m not sure where to go next. What other parameters do I need to calculate before working in ADS? Any...
I had a bunch of questions regarding the feedback component as well as the feedback mechanism itself.
1. I am using the attached schematic as reference for my design. As per the LM2576 module data sheet, it can handle a maximum current of 3 A whereas I need the IC to handle at least 15 A...
I am lookin designing balancing resistors for series capacitors and understand that I need to consider the leakage current from the capacitors. I am trying to determine factors that would case the insulation resistance to decrease over time so I can design around that.
I have just started my first job (mechanical engineering design) after graduation. As my first "big" project I need to design a work station. On this station i need to create a tool which will hold my work piece (a motor) in place. I would love to hear your insight.
Because the bottom part of...
Faculty looking for tips of designing PhD studentship interviews. Can there be more than 1 interview for each candidate, which is more common a practice in industry?
How to determine the timescale: when enough applicants in the market have reached out to us for us to start interviewing? How to...
Hi everyone
Hopefully I am not out of line posting in this forum.
I am looking for some advice planning the electrical system for my camper van. I know very little about electrical circuits and all related to it, and after 4 days of research I am still nervous to spend a lot of money and...
I'm a relatively new entry into the world of electronics so my understanding of what is possible may not be an accurate one. In a nutshell, I would like to have a DC motor act as a torsional spring with some variable virtual spring constant (k). The motor, or "spring", would act against an...
It's a 15 minute video showing and explaining some of the non-obvious reasons that the $50 ventilators don't work.
For some of the low-cost designs see:
https://makerfaire.com/maker/entry/71747/
Cheers,
Tom
where: 𝑣𝑖𝑛(𝑡)=0.3𝑐𝑜𝑠100𝑡
I have read all over the internet that this differential equation can be solved by isolating the term with the highest degree on one side of the equation. After doing so, I integrated it. However after integrating, I don't know that the next step is. Can anyone help me...
I need to create a powersupply that takes in a +5 and -5v and has an adjustable output that varies between -2 and +2 v using one potentiometer.
I already came up with a design myself but it did not work. I need some help figuring this out.
I think my idea for how to get specific positive or...
Summary: I want to design an electronic circuit that takes an sine wave as input and output a different wave
I want to design an electronic circuit that takes a sine wave as input(Vi) and it outputs a different wave (Vo). Vi goes from +5V to -5V
Vo is constant with the value of three, when Vi...
Hey guys,
I am designing a system that would monitor the coolant tanks of about 10 CNC machines through a centralized system consisting of valves, a pump & a refractometer. The system would be connected to the tanks through fixed piping in the plant.
A pump would draw small amount of liquid...
Hello everyone,
So, I want to make a fuel tank for a motorcycle with a glass window in it. I have seen a custom bike with a completely pyrex tank, so I know it's not impossible. My current questions are:
Are there any important regulations for fuel tank construction which I will need to...
Hello!
I have some plans that i want to share and get some feedback on before i start construction and buying parts. I have some land next to a lake that i can build a dam with head of 30m around 10000m2 and almost 50000m3.
I am thinking of solar panels and wind turbine to generate electricity...
Hello
I'm working on project called"design & implementation of EMG data acquisition",after I search on these systems i really confused about what the gain and the filter type that i have to use.
at the first stage i use instrumentation amplifier to amplify the signal, so how much the gain of...
I need to make the design of car floatation devices. In my case, the airbag/raft is for floating the car in case of floods. I am considering to use Sodium Azide, just like in car airbags, but it inflates very fast and shrinks in a short time. Is there any other chemical reaction that can produce...
Before I ask my question, here's a little introduction of myself. I am a college student studying in Bioengineering, so I've been tasked to create an equipment to help rehabilitation for upper limb (any point of the upper limb, doesn't have to be the entire upper limb).
So I have this initial...
Im just finishing up my first digital electronics class right now. I know how to design the logic for basic circuits and some slightly more complex ones.
I don’t quite understand how to design actual circuits for a few reasons.
1.) When we design “circuits” in class, we just draw them without...
Homework Statement
A hydrocooling unit can cool fruits and vegetables from 30 to 5 C at a rate of 20,000 kg/h under the following conditions: the channel is 3 m wide by 90 cm high. The water is circulated and cooled by the evaporator section of a refrigeration system. The refrigerant...
hi, i am studying about design the box carried on car.
i am really stuck in how to draw free body diagram for when 3 or more boxes stack together on car running and braking. there are many example with 2 boxes but i don't know why i can't find any case with 3 or more boxes
thanks in advance
Homework Statement
So I've been tasked with designing and band pass filter for my signals class. We're given the specifications that it needs to go from 200-5000Hz, and we need to use a kaiser window as the window function.
Homework Equations
There are 2 parameters, beta and N, given by these...
I am finding a dual supply op-amp which has rate of voltage dropping to be low , input resistance is high about 30 -100MOhm and input offset voltage is low. All of them serve me to design a sensor that is pH sensor. Can you give me some your ideas for choosing ? Thank you !
Greetings,
I just wanted to post a 2-bit full adder I have been working on and which I think is my final design. I wanted to ask if there was any way that I could make it with less logic gates?
Any advice is appreciated!
I am a student trying to design a Butterworth LPF to meet the class 1000 specifications, by SAE J211 (https://law.resource.org/pub/us/cfr/ibr/005/sae.j211-1.1995.pdf). My sensor is an ADXL377 accelerometer with analog output.
My filter requirements (from J211) are
fp = 1000Hz (Pass band...
At our class on digital structures, this assignment has been given. It's a preparation for upcoming lab work, and I'm not sure my design is correct. Is anyone please willing to check it out?
1. The problem statement, all variables, and given/known data
Design a two-bit comparator using NOR gates...