Designing Definition and 577 Threads

I recently started programming a basic web based app. that calculates the forces within a standard wood truss. I thought it might be of some interest to visitors to the Physics forums. I've added most of the common types of trusses used in residential construction, with more to come later...

For my senior project for my BS. in mechanical engineering , I'm thinking of designing a water purification system, perhaps powered by solar energy. The senior is a one semester course for a team of two Mechanical engineers. I know that one way of doing this is passing the water through...

Homework Statement Design a dc circuit utilizing a 15V voltage battery to provide the following node voltages: +10V, +5V, and -5V w.r.t. a circuit ground node. Select your resistors such that the maximum power demand on the battery does not exceed 1mA. The attempt at a solution I've...

Homework Statement You are working with a device in a black box which has two terminals, which are in turn, part of a larger circuit. You measure the voltage and the current at the terminals and record the following: vi (V) | i1 (A) 100 | 0 120 | 4 140 | 8 160 | 12 180 | 16 a...

Help in designing a small yet very powerful electromagnet! I was wondering what are the major things I should concentrate in creating a strong electromagnet? What are the best materials to use? The input source I'm going to use is a 1.5V dc battery. What do you all recommend? + How can I...

Homework Statement Design a 2-input XOR with the following specifications: RL = 1KΩ VDD = 1.8V VOL = 0.1V VOH = 1.7V Homework Equations Triode: Id = μnCox W/L VDS (VGS - Vt - VDS/2) Cutoff: Id = 0. The Attempt at a Solution Searching on my book I found the image...

I began designing a clay disk launcher for when I go to a gun range and I want it to be something like this: I am having trouble sizing an electric motor since I don't have much exposure to E.Eng. The clay pigeon launcher is about 10cm by 10cm and I calculated my exit speed to be 20-35m/s...

Hi everybody. My goal is to design a process that, with no automated machinery (I'm using a mechanical pipette), would allow for extremely uniform coverage (that is, with minimal area of multilayers or empty spaces) of a hydrophilic surface with a thin film of polymer solution. I would...

Homework Statement This is just for a formal engineering report, no product will be made. for my ME class, one of the very first courses. pre-requisite for this class is only vector static. This is the first week of class, and the lectures covered the role of engineers... I am being...

Homework Statement We need to design the cross section of a beam to make it suitable to carry a uniformly distributed load. The beam is held up by 4 ropes which are shown on my diagram as R. In the same attached picture I have the shear diagram and the bending moment diagram for this...

Hi guys, I have a circuit for AM generation using BF494 (beta = 160) and and an IFT (455 KHz) etc. The problem is that I don't know how we arrive at the resistor and capacitor values in this circuit. Can anyone help me withe design of this circuit. Vcc = 12 V. I am attaching the...

How do you design a BJT switch to ensure it is (Vce) saturated.

My teacher told me plan and design about 4 labs, okay the thing is I'm not sure about the layout of P/D for physics labs. I know there has to be expected results, I'm confused I don't know what to put there. My teacher gave me a lab manual to try and guide me okay, in the book at the end...

i am trying to design a robot which can track a transmitter which produces rf signals in a given range of frequencies(example:- 400-900 MHz). i want to know the following details. 1. i have a design of wireless robot with A433MHz RF modules. i need to change the frequency of transmission...

Homework Statement Need to design a second order notch filter whose transfer function is given by: H_a (s) = \frac{(s^2 + Ω_z^2)}{(s^2 + \frac{Ω_0}{2}s + Ω_0^2)} For part a (which is what I need help with) it says to assume suitable values for Ω_0 and Ω_z with Q = 2. The Attempt at a...

Hello and thanks for taking a look I'm an undergrad student that is trying to design and make a ion thruster for my research project. I know, I should of started with something simpler. The first part of this project is creating an electron source to provide the electron beam to ionize the...

I am working on designing a music visualization system using LEDs. I would like to create an analog design that uses op amps to filter, amplify, and add DC bias to an audio signal so it can be read into the A/D of a 5V microprocessor. The input signal is a +/- 1.5V volt audio signal coming from...

Designing Mechanism -- Updated Anyone got any idea on how to design a mechanism that… ◦Translates rotational motion (clockwise OR anti-clockwise) to linear motion ◦Linear motion ONLY to the right ◦Upon release, the mechanism returns to its initial state

Hi I already created a 4 bit adder but for my assignment I need an 8 bit one. Is it correct if I design to separate 4bit adders and connect their outputs (Cout) with an AND gate? 4 bit adder: https://www.dropbox.com/s/ao60s6dgtrnhal3/4bit%20adder.PNG

I have no idea what is to be done. Please help! I do not how am I supposed to proceed/begin as well. The zip files contain a data collected from an ECG machine and the pdf has the problem statement. Any kind of help would be much appreciated. Thanks

Homework Statement Have a design project in thermodynamics. The problem reads, Someone has suggested that the device shown in the figure below be used to improve the maximum force F against the spring, which has a spring constant of k. This is accomplished by changing the temperature of...

I'm doing my homework, and encountered a problem. The problem is the one as attached. It includes a part of solution that I don't understand. I've known that when designing the PI controller, we start from D(s) = (Kp + Ki/S) The condition of the PI controller is, firstly, unity DC gain. So...

My first-year engineering group is designing an automatic shut off oven system. We will integrate smoke detector systems inside the oven. Details about that don't matter. Smoke detectors work on a trip wire type alarm. Alpha particles are emitted from a small source of Americium, the alpha...

Homework Statement I am given the transfer function Gp (s) = 1/(s+16) and I have to design a controller of the form Gc (s) = K(1 + 1/T*s) (which is a PID controller) To meet the following requirements: Maximum steady state error to a steadily changing desired position = 5% Maximum...

Hello everyone, first post on this forum and I'm really excited to hear you feed back. For my first year engineering design course I'm asked to design a vehicle that will undergo a hairpin turn (180 degrees) around a 2 by 4 piece of wood. The vehicle must only harness the power of elastics or...

Homework Statement I am working on a 16:4 MUX that is comprised of four cascaded 4:1 MUXs. Each MUX has an active-low enable pin. To enable one MUX at a time, I need to use a counter that outputs the following: Clock Cycle 1: 1110 Clock Cycle 2: 1101 Clock Cycle 3: 1011 Clock Cycle...

Hey guys, is it possible to design a Bitter eletromagnet that produces 25T and is approximately 500 cm3 in size? If so, how much current would it require? Thanks in advance for your responses guys..

If designing a carbon-fibre pressure vessel (over a aluminum sleeve), how can ensure your vessel splits if ruptured as opposed to exploding?

Homework Statement Design a load which draws an average power of 25 W at a leading PF of 0.88, with Vrms = 120 V @ 60 Hz. Homework Equations P = VIcos(\theta-\phi) Q = VIsin(\theta-\phi) S = P + jQ |S| = VI The Attempt at a Solution Since it has a leading PF, the load should be...

Homework Statement Consider a buoy in the form of a vertical right circular cylinder of outside diameter (D) of 8 feet, and height (H) of 12 feet. The buoy is a hollow cylinder formed of glass-fiber-reinforced plastic (FRP) that is ½-inch thick. The buoy is to be placed in a large river...

Consider a buoy in the form of a vertical right circular cylinder of outside diameter (D) of 8 feet, and height (H) of 12 feet. The buoy is a hollow cylinder formed of glass-fiber-reinforced plastic (FRP) that is ½-inch thick. The buoy is to be placed in a large river and tethered to the...

Hi I am trying to design a TTL circuit, which is based on a NOT-gate (http://en.wikibooks.org/wiki/File:Electronics_TTLNOT.PNG). It has to do the following: When 5V are applied to it, it should deliver a short pulse such to A. The exact length of the pulse is not important at all, what is...

Hi I am trying to design something similar to a NOT-gate (very simple), and I have been following this figure: http://en.wikibooks.org/wiki/File:Electronics_TTLNOT.PNG. My question is the following: Say that I instead of grounding the lower branch want to send a current through it to e.g. a...

hi guys..so this is my first post..i would like to start of with what everyone's talking 'bout;yes the 'curiosity'..how did NASA and JPL manage to pull that off! Well...so i got thinking and decided to design a primitive curiosity which moves along certain- coloured paths...awaiting your...

Hello everyone I have completed my freshman year in EE. For the summer, my professor has asked me to design a lock-in amplifier. First he has asked me to read about AD630. Now after reading the datasheet at (http://www.analog.com/static/imported-files/data_sheets/AD630.pdf), I was a bit...

Hello, I thought I'd run this past you guys. My wife wants to start making LED trees for outside use. I have been running a part time solar power business, but all my stuff comes assembled to a degree. I have no idea how electrical code might come into play regarding electrical...

ion accelerating source setup I'm currently building a rectified, filtered power supply for use as an ion accelerator. The setup is attached as a JPEG. I am wondering how/where I can add resistors to the arrangement to make it so that when the dielectric breakdown voltage is between the...

[FONT="Fixedsys"]I'm designing a driver circuit for a 12V DC motor (Power Window). I'm using an L293D motor driver chip. According to the http://www.zartronic.fr/doc/Z1/L293D_ST.pdf the chip can withstand a supply voltage Vs up to 36V. I'm only using a 9V battery. The circuit and the motor are...

Nozzle designing help ! hii . i am supposed to design a converging nozzle for water flow Its outlet pressure should be 6 bar and flow rate is 36L/m . no. of nozzles are 3 . this is the only data i have . .i don't know how to proceed . i think its less data but its only i have ...

Homework Statement I'm doing a project right now which deals with designing a closed loop recirculating system using water to cool multiple components. However, this post will only deal with the fluids portion. Below is the diagram of a very simplified system. Note that the areas marked red...

Hello. I am attempting to design a generator that works with the (admittitedly) inefficent design or rotating a conductive material inside a magnetic field to produce current flow. I could use help finding the formulas I need to calculate the amount of spin and size of coils i will need to...

I am working on designing a trailer that will hold a load of 350lbs on 2 centered posts. It needs to have a safety factor of 3, so 1050lbs plus trailer weight. I am trying to determine the size of Steel square tube I must use. Any advice on formulas or methods of determining this? I would...

Homework Statement electric power = one million kW working fluid = steam maximum steam temperature = 550°C river mean speed = 10m/min river,8m deep,60 meter wide Homework Equations It is proposed to build a one million kW electric power plant with steam as the working fluid...

i have to design one shielding box. in that there is cylinder having high voltage +60kev. and box having metal plate. so i have to calculate the electric field on that cylinder and then decide , what should be the distance in between plate and cylinder. i have attach the geometry on the file...

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...

Hi! I recently built a small 555 based monostable password protection circuit. I designed it so that upon pressing the right keys the monostable goes on for 15 seconds. I can get a small geared motor running for this period but I' am at a loss at designing a suitable lock with it to get a...

We need to design an archimedes screw turbines to power a pump of 80 watts. Any tips to design this? I have tried a way, but I think it's very wrong. Thanks in advance :)

I want to create a programming project that involves creation of a discrete autonomous system. It is very similar to cellular automaton as the simulation environment is composed of 2D cells on an unbounded grid. Cells have attributes assigned to them which makes them behave and function together...

Hi I'm a bit stuck on a problem I'm trying to figure out. I am trying to design a damper, the layout is show below: (apologies for the poor 'cad' drawing!) So far i know: I for the beam, how much energy needs to be absorbed by the damper (4500j) and the stroke (15mm). The maximum loading...

Homework Statement Cast iron has a strength in compression of about three to four times the strength in tension, depending upon the grade. using the stress as a prime consideration, design the optimum T section for a cast iron beam using a uniform section thickness such that the compressive...