Designing Definition and 577 Threads

I have been given a project to design a bunk bed for a caravan. This must in some way be stored when not in use against the wall and fold out over the permanent lower bunk or could perhaps be integrated into the lower bunk as a sandwich design and could be moved up and fixed into position when...

here is the task; Design a labatory experiment to investigate how the range of a projected object depends on the angle of projectory and find the optimum angle i was thinking of getting dome tubing, and ataching a preasurises CO2 canister (fire extingiser basicaly), and put something in...

hi to anyone and everyone. i am thinking of using a dry sump system, there is no kit available for my application, so i would have to design my own sump. could anyone help in this area please. any help/advice greatly appriciated. many thanks

This is a UART problem, we need to design a counter for the receiver unit. And the specs go like this: system clock is 20 MHz, while data arival frequency is 2MHz, also I need to assert a STOP_RECEIVING signal once all data is received. And of course, data has a start bit and a stop bit. And...

Hello All, Can someone give me some suggestions for a chip that can drive some high frequency mosfets to create an AC square wave? I am designing a circuit that pulses the voltage from a capacitor into some coils I am working with but I need the square wave to be AC and not DC. I want to use...

Hi, I'm designing a circuit in pspice and having some trouble with the switching. In my circuit in pspice I'm using an ideal voltage controlled switch model "S" and using a vpulse to control it. My current through the switch needs to be bidirectional, and maxing around 80mA with an average...

im designing a preamplifier, but my waveform is sweeping at around 2.5 volts, as the is a preamplifier it should be swinging around 0.0 volts. Does anyone know would to fix this problem? i am only using discrete components no ic's as this is one of the specs. the specs are as follows: 1...

I am a double major in EE and physics and I was thinking that a great senior project would be to design and build my own mass spectrometer. I would not only like to build the basic device, but also calibrate the device so that it provides the m/q value based on the radius of curvature caused by...

This is not homework please do not move it to the homework section. I need a pulse generator for an experiment I want to conduct at home... but I don't have that kind of money so I am trying to design and build one. I am trying to see if the type of pulse generator I need is even feasible...

The rebuild of my bike is well under way but i have hit a snag, i decided to convert the primary drive from chain to belt drive, all the parts are under construction, the problem is the origonal housing is 3/8 to narrow, and these housings are notorious for leaking oil any way, the oil comes...

Hi, I'm making an AUV and need to design my own acoustic modem. Now, after hours of research I found these PDFs (attached). In theory, can I remove the signal generator from XXXXPinger.pdf, add a DTMF encoder and then use a build the transducer as described in bender2.pdf to transmit the...

Hi, I'm new here. can somebody put here an a schematic of Class AB, D,G or T. I need an audio amplifier that work with bjt and mosfet simultaneously, i think that kind of amplifier is class g, but I'm not sure,for example i saw an 5000w amplifier with 2sc5200 and his pnp pair working with...

Hey. I've been given the opportunity to perform a physics experiment this summer, and I have free range over what type of experiment I choose to perform. I'm sure most physics majors wouldn't have a problem designing a project, but I am finding the task really difficult. So far I've only...

Has anyone here happened to design a remote control... I am just into it...so i am looking for information to understand how can we go about doing it..

I have to develop a mechanism with which to tension shade sails (its basically material tensioned between four posts to provide shade). I've got the mechanism going, but for the failure analysis, I need to calculate the peak tension in the shade sail. This is my information: 1. Largest shade...

Hi, I am designing a solenoid driver ckt. The solenoid can hold a max force of 2.75lb. If I want my ckt drives the solenoid with max force, what current or power the ckt need to draw? Thanks for any help. Mike

I have a Buick Grand National. There is a company that sells a kit that consist of 4 bars connected in the back seat area of my car. http://img.photobucket.com/albums/v625/BrockBlackZ/braces1.jpg" . I wanted to get your opinions on what you think would be better for rigidity (round hollow or...

Hey, I have some problems with my synchronous counter. Here is what I got. sorry for the big and bad quality of the pic. My scanner sucks :( Here's the karnaugh map. I need to simplify them and use only NAND and inverters if needed. http://img101.imageshack.us/img101/7335/hw4na.jpg I need to...

Hi! I want to design a simple, frequency synthesizer that synths from 1KHz to 16KHz is 1Khz steos. The required frequency should ideally be chosen by a "switch" of such. Does anyone have, at least, some ideas or uselful links. I've googled this but I've been presented with rather complex...

Hi everyone. There are 2 questions i cannot solve here. So i am hoping someone here can help me out. Here are questions: (1) Design a synchronous counter using J-K flip flops which will count through the sequence 0, 2, 4, 6, 8, 10, 12, 14, 0. (2) Design a synchronous down counter using...

Hi everyone, Im designing a new device for openeing bottle caps. But I am stuck, :cry: basically I have a second class lever (pivot at one end, effort at the other and weight in the middle). The weight is 72.21N the overall length from the effort to the fulcrum is 64mm and the length from the...

Hi everyone, Im designing a new device for openeing bottle caps. But I am stuck,:cry: basically I have a second class lever (pivot at one end, effort at the other and weight in the middle). The weight is 72.21N the overall length from the effort to the fulcrum is 64mm and the length from the...

Hi Experts :smile: Finally I think I found the correct space to assist me from experts. I need urgent help from u pp about the Cascade Cooler. We r doing a project in our college as final year BE, Mechanical students in India. We have choosen to Design the Cascade cooler which is used...

Ok I'm designing a simply system for a three input game show buzzer. I'm thinking about using a demux chip that simply handles analog voltages like the 74hct4051. However I need to only allow the light for the first person that clicks their switch to be displayed. A microcontroller could be used...

Need help designing ADC system - URGENT! I have to design a system where an analog input is converted to a digital output which will be sent to a parallel digital data bus using a ADC chip. the specifications are that the input should be between 300-3200Hz with a digitisation error of 1%...

I am designing a three phase permenent magnet generator , and have a question. as a magnet pair passes over a coil , inducing a voltage, that voltage is most dependent on ? 1) the angular velocity ( that's a given) 2) the pole strength 3) flux density 4) energy product. 5) thickness of...

I'm planning on building a small ski lift for my kids. It's been 20 years since I've taken a physics class so I'm lucky to remember what gravity is. :blushing: Here's a poor image of the hill. I would like to know the following: A) how much lbs of tension is against the lift wire? B)...

hello everybody, my teacher:mad: wanted me to design a few circuits like these; 1) an electronic termometer, 2) a circuit that switches on the lights and pulls the pitches in evenings by using circuit elements like LDR and NTC. pls help me :rolleyes:

Hi:biggrin: , I am again, I want to know How I can make simple rectifier, If you can give me graph for rectifier. Thanks I appreciate it :approve:

I have to design a beam for my Materials Class design project to be tested on a univ. bending machine. We have to be within 2.5" by 5" in max size, and 24" long. I wrote a MATLAB prog to calculate every possible configuration to optimize what sizes to pick for a block, a T beam and an I beam...

Is there a way I can design a broadband reject filter using a lowpass filter with cutoff frequency f_1 and a highpass filter with a cutoff frequency f_2,\ (f_1 \ll f_2) , combined in parallel with a summing amplifier? My current design yields a response that isn't a broadband, there is a...

The new design here made me want to redesign my boring standard phpBB look. How would I go about testing the new look without having to actually make the changes on the site? A sort of demo. In the admin panel for phpBB, there are certain basic fields I can edit to change the basic color scheme...

Does anybody know where i could find info (books of links) on designing an anutomotive differential? Thanks

Hi for school i need to design a balsa wood beam. Winner is judged be strength to weight ratio. i have searched around and found all the stress and strain values for balsa wood at different densitys etc... now my dilemma is that i have to use formulas to design this beam before it is...

friends i am making a stop clock.iwant to add certain extra ordinary and good features in itwhich are technicalyy feasable.if anybody has some noble idea in this regard please answer me.

Does anyone, by chance, happen to have some good, practical references in the design and preparation of piping systems for use in pure oxygen service? My ASTM references are about as close to worthless as it can get. Thanks.

Hey friends, My question is that why only 2-stroke & 4-stroke engines have been made?Why not 6-stroke or 8-stroke?Is it possible to have such engine? Any useful suggestions are welcome.

Is there any software out there where you can basically design a new bathroom or living room or whatever? And i mean like, drywall, tiling, plumbing, cabinetry and all that kinda stuff and not a bed or a curtains or whatever. Is there any software that can do this rather well? Sounds like some...

I am doing a project in Design & Technology and intend to design a product that is to be used by Playstation 2 (or other consols) users. I have a few questions, which I would be very grateful for if I get a few replies: Do you have a Steering wheel and pedal that you use to play car games with...

been stuck on this all day Design a test to determine whether the charges on an electron and a proton are exactly equal. any help would be good

Is there a program for designing circuit boards that does not require knowledge of circuits? Were you can just specify what you want the circuit to do and the program designs the circuit board for you.

Hi guys, Im thinking about designing an intake manifold for my car for fun. I don't necessarily want to make it or anything but I think it would be a good project to do. Can you guys recommend me some books or software that would help me out? I don't have much of an idea with CAD, but...

This post is cross listed at the below url https://www.physicsforums.com/showthread.php?t=73985 I'm attempting to use MATLAB to solve an electrical engineering problem dealing with controls... I'm trying to design a transfer function which will control a servo motor using what is often...

i realize that this is a common question, but i have a partner for this assignment and she's doing something different than me. i just want to make sure I'm not off base the assignment is to design a bungee ride. the problem involves someone being launched from 150 ft above the ground and...

You're designing a toy rocket to be launched by a spring. The launching apparatus has room for a spring that can be compressed 14 cm, and the rocket's mass is 65 g. If the rocket is to reach 35 m altitude, what should be the spring constant? U_o = 1/2*kx^2 K_o = 0 well work is being stored...

I am doing a project for my physics course...I have to design a device that uses electromagnetism. I'm thinking of doing something "different" rather than the boring bells/radios etc.. Would a small-scale model of a maglev train be feasible in everyone's opinion? I am planning to build a...

Does anyone know of any software (preferably free) that can design relatively simple cicuits?

Hello! We've begun a new project in our Physics class, and the objective is to walk on eggs with shoes designed by each group. My problem is designing the shoes. I have learned that we need to increase the surface area of the shoes to reduce the pressure, but I don't know of any ideas on how to...

A front wheel driven trike to be exact, how would i start designing the suspension geometry, i have in mind an ultra light vehicle driven by the most economical engine "within reason", and street legal, maximum speed 70 mph, to carry two persons with some comfort. the driven wheels would be...

For a class, I need to design a basic overhead projector. I know a little bit about optics from an algebra based physics class I took a while back, but I don't remember most of the specifics, such as what kinds of lenses flip objects before and after their focal points. I'm also not sure what...