Design Definition and 1000 Threads

Homework Statement I am designing a voltage divider common emitter amplifier given the following parameters Av= 40 dB +/- 1dB Zi> 1000 ohms Zout< 5000 ohms Stability factor = 5 Beta*re= 650 ohms Beta minimum = 35 Beta maximum = 300 Vcc = 20 volts Rload = 33 kilo-ohms Rsource =...

I am nearing the end of college, and have to start picking my electives to get approved. You can mix or match or do an emphasis in either mechanical design or energy. Ever since I started school, I was sure I wanted to do energy because the classes sounded interesting. But now, I have really...

Hello everyone, I am working on a project in which I need to make a broadband/pulse transformer. The transformer will operate in the 20-80kHz range. The transformer will use about 20 watts of power. I need a turns ratio of 1:3. 20V input 60V output It's just for hobby use. I don't have...

Hello all, Its Ali here. I am a Electrical (Telecom) Engineering student and my Final Year Project (FYP) is Portable GPR in which I am designing UWB transceiver. Currently I am working on the transmitter part. Here are a few specs of the design: -Simulation Software: NI Multisim 12.0.1...

I'm trying to understand the angles and force involved with my current project of building a 3 wheel front loading cargo bicycle. The current design stipulations maintain that the rear wheel always remain inline with the cargo(There are a vast majority of designs that do not adhere to this)...

Hi all! I am happy to find this very informative forum! I have graduated with a degree in Production Engineering and Management and I am interested to gain more knowledge in CAD and work as a Design Engineer. While in University I had a CAD course where I learned to use Pro/E, but that's all...

Hey everybody, a couple years ago, I came across the top gear video for the Arial atom: a ~1000 lbs road legal 'go-cart' with a supercharged I-4 engine with a power to weight ratio of 600HP/Ton. Even though the body is already light, I would love too (once I get the time and resources) build...

I need "book smart" help with this boat design. Here is a picture of the design which I will explain in a minute...

Homework Statement I have to design a Common Emitter Amplifier using a 2N2222 NPN transistor and an 18V DC supply. The specifications are as follows: Should be stable for variations in forward current gain, β. The input signal to the amplifier is a 0.2 Vp sinusoidal signal, at a frequency of...

Hey guys, For my degree project this year I am designing a Vertical heat pipe to be used in a geothermal heat/power production application. I was wondering if anyone knew of some good resources about this topic. Any advice would be appreciated!

Homework Statement Find the design ultimate sagging and hogging bending moments per metre width of slab. Load on slab- Imposed 32 kN/m - Permanent 39 kN/m Length: 5m Depth: 8m Thickness: 0.175m Not sure if relevant but it has 2 spans (i.e. two 5m lengths of slab) but...

I am studying basics of analog circuit design from microelectronics circuit analysis by donald neamen And in that i encountered a problem in design of audio amplifier. The question and solution is given in the attachment. And i want to know that in the output emitter follower why there are no...

Homework Statement Assume the op amp is ideal. Design the circuit such that Vo = Va + 2Vb + 3Vc The Attempt at a Solution Not sure how to go about this one. I started with \frac{V_a}{R_a}+\frac{V_b}{15k}+\frac{V_c}{R_c} = 0 since the op amp is ideal, the sum of the currents going into the...

Hi everyone. I need small help regarding my BE project. I would like to design a current to voltage converter circuit for silicon detector, which produces current of 10pA. can anyone help me how to start please. Best Regards, nani

Hi, i want to design a heat sink for following mosfet http://au.element14.com/vishay-formerly-i-r/irfp360pbf/mosfet-n-400v-23a-to-247ac/dp/8649359 its technical data sheet is provided here http://www.irf.com/product-info/datasheets/data/irfp360.pdf i am not sure how to design it...by...

I have to calculate the number of M6 Button head screws required to hold a door panel of 40 kg when 700N (calculate at the center line of the mounting holes) of force is applied laterally. I want to consider only lateral case when the force is applied perpendicular to the door panel. Any idea...

how do i determine the bending stresss on the vertical column?? i already have the bending stress on the horizontal member due to a load of 4000lbs..and i have the bucling st or compressive stress on the column.i was told that the column undegoes both compressive and bending stress.. is the...

I plan on undertaking an Undergraduate Degree in Games Design, however I also hold a keen interest in Mathematics. I know that both degrees are a great combination for the programming aspects of game design so I want to do Mathematics afterwards. I'm wondering whether I will get any kind of...

I need to design studs for a front truck wheel inlcuding the pattern, position, type of stud etc. I am having trouble developing a free body diagram of the wheel studs and finding all the forces on the wheel studs. I know the following info: Max all up mass loaded...

Hi, I was wondering if anyone knew how to design a single supply difference amplifier... I don't want a comparator or a difference amplifier chip. I need something that will output an AC wave. The inputs of the amplifier are AC sine waves which have slight difference in amplitudes. I designed...

Hi, I am trying to design a Synchronous PM linear machine but do not know from where to start. The only known parameters are the required power and the maximum distance that the translator can move. Can anyone guide me on how to proceed please? Thanks Annalise

Hi, This is my first post, and if this is the wrong area, I apologize. I was wondering if anyone knows of a software package that will design the pole faces for a quadrupol or hexapole electromagnetic beam focusing magnet given the beam parameters and electromagnetic magnetic field strength...

Hey All, I've been a long time viewer of these forums but only just joined because I'd like to get some other viewpoints. For one of my biomechatronics assignments, I was asked to design an active knee exoskeleton for assembly and use in the developing world. I've already conducted a...

Hi everyone, Recently i went to visited my grandfather and he brought me to his room where he pulled out an old artifact that he got from his father that got it from his father. He says it is from Egypt. it like a circle container and has a symbol on it. The symbol really intrigued me so...

I'm designing an inline heater for a coffee brewing project. My plan is to use an aluminum tube with Nichrome heater wire wrapped around it to heat the water flow. For brewing I need to dispense somewhere around 16 fl-oz per minute at a temperature of 205 F. I would like to determine...

I know that in collage, you need to take a mechanical/electrical engineering courses, but what is the design process for weapon making? As in, the thought process of creating it?

Hello folks I am about to start on my final year project and I am not sure how to go about it ,, as in what I need to write about and what calculations I should do relative to my design, its bascailly a system that apply s plastic hanging tabs to a product ,basically it will be a motor that...

Dear All I have been recently started to work with Reverse Engineering technology and I would now like to determine a circuit layout diagram of a charge controller from its PCB Layout. Can anyone please help me with this one. I have uploaded the PCB design for your reference. Please...

Anyone can guide me how to design gearbox on speed reducer? If I using spur gear on my design which type of spur gear has better lifetime and lower cost? 1) Brass Spur Gears 2) Steel Spur Gears 3) Stainless Steel Spur Gears 4) Ground Spur Gears If Steady-state input speed 1000 rpm and...

I've been design a simple ohm-meter which can measure resistances in the range 0.001 to 100 Ohms. I am aiming for an accuracy of 3%. Here's the circuit (so far): The circuit is basically a programmable current source which can source a current of 100, 10 or 1 mA. At junctions Va and Vb...

Need on urgent basis as to design supercell lattice of pcf

The link is an image with the question and circuit representation: http://i49.tinypic.com/2mmwg8l.png Here are the equations I used: V_out/V_in = R_2/(R_1 + R_2) {using the node method} R_thevenin (R_th) = R_2*R_1/(R_1+R_2) And given the conditions => 10 < R_th < 30...

Hi all, I'm curious about what you guys did for a senior year project. Even though I'm still far from graduating, I'm already thinking about senior design. Anyone have any ideas for an EE project that involves mechanical engineering as well? Maybe that wouldn't be feasible since as an EE...

Perhaps someone may be able to suggest (Windows) software that I could use that allows me to draw experimental set-up schemes on my computer (i.e. include images such as beam splitters, wave plates, PBS’s) without much hassle? Anything that is open-source, perhaps? And easy to use? Otherwise...

Homework Statement Given = 5 - light bulbs Light bulbs 1 and 2 each dissipate 180 mW at 12 V Light bulbs 3, 4, and 5 each dissipate 45 mW at 9V. 1 - 12 V supply 2 - Resistors (Range 10-1000 Ω) 5- switches The design must meet the criteria: Each light bulb can be independently...

Homework Statement Design a suitable combination of resistors, capacitors, and/or inductors which has an equivalent impedance at ω=100 rad/s of 1Ω using at least one inductor. Homework Equations Zeq=ZR+ZL+ZC ZR=R ZL=jωL ZC=-j/ωC The Attempt at a Solution I really am not sure how to start. I...

Hello every body! Last weak I decided to make a corner reflector antenna for reciving TV signal.Now I need design and construction theory about it with total idea.I also need circuit diagram.Please share with me if anybody knows. sorry for my bad English. Thanks

Hi, Can anybody recommend me a good video lecture series on Introduction to digital logic design? I want to watch these videos before going to class.

Hello, Does anyone know any (free) software for generating simple crystal structures like forms of SiO2 or TiO2? It must be a really common problem. My current strategy is to search the web for hours until I get lucky. There are online databases which have really complicated structures from...

I am thinking of building a Stirling engine and am debating between a gamma type and beta type. Any advice on which type I should go for, and what the advantages/disadvantages to each is? Thanks

What are some usefull softwares to use for pipe work design? Are there any softwares where you can select material? Can design to specific standards?

Hello all, I was wondering what kind of references design engineers like to have handy? So far, I have Shigley's Mechanical Engineering Design and Roark's Formulas for Stress and Strain What other references do you like to have on your bookshelf? Thanks :smile:

Background: To prevent too much torque having to be transmitted through the gearbox on a gate valve, a shear pin is to be fitted between the hand wheel and the gearbox spindle. When a certain torque is reached the pin should rupture and no torque transmitted. See attachment for reference...

My question is kind of simple, does the calculus of variations find its way into the design of the shape of an airfoil? I'm interested in what kind of mathematics gets used in basic airfoil design. I suspect the calculus of variations must be involved, but I know nothing about deriving the...

I am designing a flywheel for my own system. I don't know what are the input I should consider to design my flywheel and need to find what is mass & speed of flywheel should I use for my system to avoid fluctuation and uniform motion. I have attached the system picture and I have mention the...

I'm starting my undergrad senior design course and I'm having a bit of trouble coming up with a good project idea. The team consists of 2 EE's and 2 CpE's. Our project is supposed to take 2 semesters ( design / build and test ). I want to do something challenging and fun. Please share some...

I have a quick question regarding graduate school. One of my dream's has always been to design aircraft - hence, I would like to focus my career on engineering design. The problem is that I have no idea what type of background a student would need to enter into this type of field. Currently I am...

Hi, for my third year project i have got to design a nozzle to fit a fire extinguisher. However firstly i must analyse fluid flow within said nozzle, but i have no idea how to use GAMBIT/FLUENT and finding it difficult to find relevant user guides on the internet. Anyone care to offer some...

Hi everyone, I am trying to understand the basic design requirements and rules for designing a pulse transformer which includes two secondary coils, one of which acts as a DC reactor. Does anyone know of any papers or software or have any experience with such a design?

Hello all, Maybe it will be a silly idea, but I fink about design engineering database-handbook site creation. In this site will be published something like: material standards, fitting element standards, short guides about some elements design key elements creation, or advantages -...