Building Definition and 891 Threads

I'm taking an intro electronics class and I'm really enjoying it. I want to be able to work with electronics in my garage, I have a proto-board and but I would like to build a power supply that can go from 1vdc to 15vdc, this is what my class has. I've looked on the net for instructions, but...

1. This was just a quick question that I was thinking about. If you jump of a really tall building, let's say 100-story building and you fall most likely you won't live to tell the tale. But let's say you jumped with a cardboard (or any object) and a couple feet before you hit the ground...

Allow me to be so bold as to ask,how do you build an Electronic Inclinometer to measure a boat tilting until it reaches a 5 degree angle. When the boat tilts to a 5 degree angle, the inclinometer has to be able to read the 5 degree. The Inclinometer has to be waterproof because it will be...

Im trying to do just that, that is build a timer that countsdown accurately to the minute. Ideally this device should have a range of about 5 second countdowns to 36 hour countdown. I'd like to add a 7-segment LED display wired to count as well but I am not sure I think i can do that with a 555...

I am supposed to make a car similar to that of a mousetrap car, except without using a mousetrap. I have basic materials and I am completley dumfounded when it comes to making the car "go." please help me! i am so desperate! i originally thought that using a car to make the car go would be...

Assume a rigid building(assume the building to be like a pyramid and its empty inside) to be vacuum. If we open a hole(about r=.5m), then, how long will it take for the air to take up of the whole space apprximately? Will, it's just curiosity because I found a little pump in a class room...

I need to build a timer(using a 555) with a frequency of about 1KHz and a duty cycle of about 25% to provide my clock signal. So the 555 is obliviously in astable mode. From my engineering data sheet: D=\frac{R_B}{R_A+2R_B} f=\frac{1.44}{\left(R_A+2R_B\right)C} where C is my capacitance value...

Homework Statement Use the given information about the asymptotes of a function to write an equation for a rational function. You may leave your function in "factored" form. Homework Equations 1. Vertical Asymptote at x=3 and x=-2 2. Vertical Asymptote at x=5, Horizontal Asymptote...

Homework Statement Take up as positive. A rock is projected from the edge of the top of a building with an initial velocity of 16.5 m/s at an angle of 40 degrees above the horizontal. The rock strikes the ground a horizontal distance of 82m from the base of the building. The acceleration of...

This semester, we have to build a database management system (DBMS) as a mini-project. We do have the database theory course covering database management concepts, sql and pl/sql. The project is to be done using Oracle and possibly Visual Basic for the front end and maybe a programming...

Hello, I'm tasked with building a queue from as many stacks as I'd like, trying to get the fastest implementation possible. The best I can think of is using two stacks and as you enqueue items you push them on the first stack stack, but every time you want to dequeue if there are n items...

Hi there, For a personal project of mine, I have been designing a low-noise linear power supply to provide power to guitar effects pedals. A couple guitarists I know use a hodge-podge of AC adapters and switched PSU's to run their various pedals (sometimes 8 at a time). This mixture of...

im working on a ship that can fly; simple yes . well having a little trubble tring to found out how mutch HP is needed to lift one pound in the air. I am making the engine my self i can't really give to mutch information at this point in time becouse I am still working on the frame work for...

greetings :) so I'm pretty stumped on this one question from masteringphysics: A ball thrown horizontally at 23.7 m/s from the roof of a building lands 35.0 m from the base of the building. How high is the building? i first listed all of my given values ---------------------------...

Homework Statement "In a chase scene, a movie stuntman is supposed to run right off the flat roof of one city building and land on another roof 1.6 m lower." "If the gap between the buildings is 4.5 m wide, how fast must he run? " Homework Equations Vf^2 = V0^2 + 2a (Xf-X0) This...

I have a few questions and verifying statements regarding the concept as well as practical building of Faraday Cages. 1. A Faraday cage's mesh must have a grid with a spacing less than that of the wavelength that is intended to be stopped. 2. Why is it that foil and mylar also work as...

Design a method to calculate the height of a building?this is an engineering design question... URGENT! ...i need inputs !

Hi! I`m new here and I need some info where I can find project about building Geiger counter and where I can order the electronical components with shiping to Europe (Macedonia) :confused: Please help me!

hey every1.. at the moment for a school project a group of mates and i are building a rat trap operated car. This is made by obviously a rat trap with about 5mm diamater front wheels and cds as the rear wheels... this is just a quick explanation. what i need to do is find out how far the car...

Alright, I need this information not for science homework, but for writing a short story. You see, I am very particular about the tiny details, and in the story there is going to be a superhuman jumping off a building. I want to know the speed of such a jump to dramatise the description, but...

My name is Dain, and I'm wondering if someone would be able to help me, or point me in the right direction on designing a aerodynamic 3 wheeled billy cart. Once a year at my old home town of Beechwood in NSW, Australia, is a 5.6 km 2 person billy cart race down Pappinbarra Mountain...

Could i have some help with the following: Design, floor joists in a domestic building to span between walls 3.0m apart. the construction of the floor is 18mm timber boards joists 15mm overall plasterboard + skim coat The joists are 50mm wide and at 450mm centres The permissible...

rock is thrown from the edge of the top of a 100-ft tall building at some unknown angle above the horizontal. The rock strikes the ground a horizontal distance of 160 ft from the base of the building 5.0 s after being thrown. Assume that the ground is level and that the side of the building is...

I'm a beginning QFT student, trying to slog my way through Slansky's http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVP-46SPHMC-94&_user=4422&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000059600&_version=1&_urlVersion=0&_userid=4422&md5=c09eed961c9201786651592d71de94f3"... I...

Hello, I'm looking to build my first telescope from http://www.apogeeinc.com/product.asp?itemid=766 (PDF file). My question is this, is this a suitable guide in doing so? If not what steps should i take to successfully complete this task?

Homework Statement A rectangular building is being designed to minimize heat loss. The east and west walls lose heat at a rate of 10 units/m^2 per day, the north and south walls at a rate of 8 units/m^2 per day, the floor at a rate of 1 unit/m^2 per day, and the roof at a rate of 5 units/m^2...

Could anybody please assist me. I need to regulate 12 volts dc from a car battery down to 1.24 volts dc yet I still need to be able to draw 12 - 15 amps. Ideally I would like to be able to adjust the voltage. Does anybody have any ideas how I will be able to achieve this & if so, what...

Electric car, it has to have a 50 mile range before recharge, carry two people with room for cargo (shopping), be a home garage project, i have been looking round and think the WarP motor and Zilla controller are a good drive system run on 72 volts. Would a fiber glass monocoque with molded in...

I'm trying to build a motor like the one in this http://youtube.com/watch?v=h6Ev64h49wg&feature=related". I can't seem to figure out how the split ring works. From what I can tell, only one solenoid would be powered at a time, but wouldn't that be inefficient? Also if only one is powered...

Homework Statement a 75kg thief wants to escape from a 3rd story jail window.unfortunately, a makeshift rope made of sheets tied together can support a mass of only 58kg. how might he use this "rope" to escape ? give a quantitative answer. Homework Equations \Sigma F = T - mg (there...

Hi, I need to build a telescope for my physics class. I need to use any 3 lenses(converging or diverging) and 1 mirror. I was thinking of using an achromatic telescope design for that. However I am not sure what kind of lenses to use and whether I should make the eyepiece from two lenses or just...

Okay so completed a similar project the other day,but I am addicted now. I built a parallelogram binocular mount similar to this. Now I am trying to come up with ideas for a binocular chair...like this I would like to make the chair recline though. This is where I need help. I need to...

Homework Statement For my physics project I decided to make a Faraday cage to cancel out cell phone signal. Homework Equations The Attempt at a Solution For my first attempts at making a successful project I used chicken wire and wire mesh to make a cylindrical cage. Our goal was...

Homework Statement Hey guys! I am a year 10 student from Australia and our school is having an Engineering Challnege. One of the tasks is to build a 80cm bridge using only paddle pop sticks and PVA glue. To win, the bridge must hold the most weight but have least mass. It would be...

My physics teacher gave us kind of a cool end of the year project: To construct a boat made entirely out of newspaper, masking tape, and shellack (I think this is the proper spelling). The boat will then have to go from end to end in a pool and the first person who does so wins. My idea is...

Some of you may recognize this Mount in the picture. It is a "Window mount" for a pair of binoculars. There are two main components here. The bottom 'half' that mounts to the window. And the 'Top Half' that attaches to the binos and allow for a couple of degrees of motion. I just want the...

Hello, I'm an electrical engineering student and I've decided to build a robotic arm as a final project for one of my classes. Basically, my skills as far as building circuitry and solving electrical problems are at an intermediate level at this point, however, I'm not too familiar with the...

I have a very limited budget right now. How much do you think it would cost to build a small Tesla Coil? This would include buying the components of a Tesla coil.

Forgive my ignorance if I'm missing something obvious; although I try to stay informed my interest in physics is rather casual. However, I do like to think and speculate about such things based on the knowledge I already have. So with this in mind, I thought I'd just get some feedback on some...

Can we build a Magnetic damper ( for magnets ) with nano thec or any tech ?

i have a project for physics where i have to build a glider, its going to be flown in a hall way, so it shouldn't be too big. however, i don't really know of any designs that would work well so any ideas?

Homework Statement A symmetric building has a roof sloping upward at 34.0 degrees above the horizontal on each side. A)If each side of the uniform roof weighs 1.10×10^4N , find the horizontal force that this roof exerts at the top of the wall, which tends to push out the walls...

I wanted to get wireless (bluetooth) earphones for my mp3 player but when I checked I found that they were way out of my price range (bluetooth earphones for phones with bluetooth are relatively cheep, but for a regular mp3 player they're expensive ~ 200 dollars). So I had an idea: I can make a...

Hi guys I hope I'm in the right subforum. I was thinking of a way to map a house or outside area with radar or some other method, and then using that info to create a map for a game. So my question is, what are the different methods available for sensing the surrounding area and creating a...

build the circuit of http://img517.imageshack.us/my.php?image=img86381xv6.jpg using 4:1 multiplexer i don't know what the plus meens i know that the second after the plus is the don't care group but i don't know how to solve it i wrote a unified truth table for both groups...

Hi Experts! I have my own company and we are working on small project for goods movement. I would require your valuable help to achieve this... Brief: A vehicle which can carry mass load and can fly from one point to other. Direction is changable. Which can be controlled. This is manually...

which produces a sum of 2 bit numbers x0x1 y0y1 the output is C (carry) S0S1 the problem is i know how to build a truth table and a KARNO table and even how to build this circuit i know how to build a full adder circuit the problem is i don't know how to build this task using 2 full...

which produces a sum of 2 bit numbers x0x1 y0y1 the output is C (carry) S0S1 the problem is i know how to build a truth table and a KARNO table and even how to build this circuit i know how to build a full adder circuit the problem is i don't know how to build this task using 2...

Well... I am in grade 12 Physics and we were asked to make a Slingshot to fit within a 1 meter cube. If anyone has any ideas or know any websites with plans to making one.. it will be very helpful Thank you.

What are the forces that we need to consider when constructing a building? when there are tree that can resist an earthquake why can't a building resist it?