Design Definition and 1000 Threads

Hello everyone, first post :shy: Long story short, I'm sick of conventional role playing game attributes and the math used in combat and am trying to create my own set to make combat more realistic. I realize that the stats are over simplified just to keep it simple for the player (and the...

Hello, I am building a mousetrap car for my physics class. I have looked at other threads for the best materials and designs but none of them have helped me much. I was wondering if anyone could give me something new to work with. I would like to have a three wheel design but my main...

If anyone Have a Process Of Design Or any Designed Axial compressor can help me in my project ...cuz I have a Graduation project Of Design Axial compressor and I need Your Help pleasezzzzzzzzzzzzzzzzzz :)

G’day everyone I need some direction / advice in the area of electromagnet design. Application and restrictions: DC supply Push down and hold with 100N of force Pull up with 100N of force and hold with 1,000N of force (or pull up and hold with 1,000N of force) Stroke length: 10mm...

I want the LED to be off when there is a certain input voltage let's say 5v (the exact value doesn't matter), but when that voltage drops I want the LED to turn on. I would also like the LED to remain on even when the voltage goes back up to 5v. I was thinking of using some sort of logic gate...

please excuse the writing in some of these messages as I am typing this from my phone, but I am looking to build a high output wind turbine. I have a few questions. I am a high-school senior and have a large understanding in physics. my idea involves a 12 wing rotor as wind speeds are low in...

I am creating a coil gun using a capacitor bank consisting of 3 470uF capacitors rated for 500V. They charge to about 250V using a Cockroft -Walton voltage multiplier. A switch controls the amount the capacitors are charged and a voltmeter gives and accurate reading of the current voltage of...

from online descriptions of laser mouse operating principle it's unclear to me that the mouse would need to be particularly big. Is the size of the mouse really based on ergonomics considerations and it could in practice be fit into much smaller case if we wanted to? Is the mouse actually mostly...

Dear All, Can someone give a specific answer to the question 'What is advantage of using Cast steel over Cast Iron in gear box casings.' Or let me put it like this we have changed our specifcation from CI to CS for Gear Box casing(gear boxes for belt conveyors),now we want revert back due...

For my grade 12 physics class, we need to build a roller coaster. We are given a marble weighing 5 grams and it must be projected at the end of the track. It needs to land 0.5 m at a target when it is projected. Since the coaster is made entirely by myself the ramp in which it will be projected...

Hello everyone, I'm Jamie and at the moment I'm at the final stages of my final year design project. I'm designing a piece of exercise equipment that motivates children to exercise but have run into a bit of a problem with regards to the circuitry. The image above shows the finished...

Homework Statement You have two 120VAC:24VAC transformers, 16 high voltage capacitors and 10 high voltage diodes. Design, on paper, a circuit that maximizes output voltage. What is the maximum voltage of your circuit? Homework Equations The Attempt at a Solution So my textbook...

Hello everyone, I'm interested in making a basic 3d fountain design using some of the software in my lab, mainly to start developing intuition in using such software. Would Creo or Inventor be better for the setup? Also, if I wanted to test the water flow through the fountain at different...

Hi I have taken a very rudimentary course on antenna theory, now i am interested in further deepening my knowledge. I have bought myself Balanis's book on antenna theory, I need some guidance regarding what chapters should i study as it is quite a large book. Secondly, after i have got...

[SIZE="2"]By a simple procedure , what should I do when I'm going through the thermal hydraulic design of nuclear reactor core...? .. I put initial guesses for the core dimensions ( fuel , clad , gap , length) initial guess for the fuel element pitch desired power ... I've found q'' critical...

Hello, This is my first post, so I believe, that you understand and help for me. So I have a task to design vacuum vessel, precisely, my task names "Training stand to measure the height of the flight fuel pump". Height will be simulated by vacuum in fuel tank, which will create a vacuum pump...

Hello everyone, I was wondering if there is someone out there that could point me in the right direction as how to get into designing An ex-navy nuclear machinist mate, I am currently a sophomore/junior enrolled at ODU in Virgina perusing a bachelors in ME and a minor in EE with a GPA of...

I am making a robot that entails a moveable base and a basic moving arm. I have made a force diagram using a 50kg, 110lb weight 9the maximum intended load. Doing the math (some of it I rounded) I would need at least 540 N of force to raise the weight. How could I design a shoulder joint in such...

Homework Statement Hi, I am trying to complie my counter (writen in system verilog) using synopsys design compiler. It comes out this error: The expression in the reset condition of the 'if' statement in this 'always' block can only be a simple identifier or its negation. (ELAB-303) ***...

Hello everybody, Please i need a reliable software to use in electronic circuit design, and to check the circuit to be working before manufacturing,i mean not to make it, and then find that it doesn't work, so software to design and another to do analysis of the circuit, or one software do...

I'm trying to make an elbow joint for a robotic arm that is actuated with a stepper motor and two gears. Here's a quick sketch of what I'm trying to do: http://imgur.com/mBlg7 The two bottom plates will be attached to the 'bicep' and the two upper plates will be attached to the 'forearm.'...

Hello Need to verify please if the following custom design lens is reasonable -- Sensor: CMOS sensor, 1/3”, 6μm x 6μm pixel, Wide VGA 752H x 480V, 4.55mm x 2.97mm Imaging Area -- Focus: 50m till 200m -- Lens: f2.8; Focal length=34mm; Diameter=13mm Pay attention I am not a physicist...

Hi I am in my final year of uni and for my project I am looking at doing it on a wireless sensor network for a car park application. The thing that I am currently stuck on is that I am trying to define my specifications for the project, in particular the hardware specs. My project is...

Manufacturing design / process engineer -- hands on or sit on yer butt? I've heard that manufacturing process design engineers (not sure if that's exactly the right title, basically designing the things you see on "how its made") have much more "hands on" experiences than other engineering...

Hi, I was reading about PWR control system and I saw that control rods are stainless steel tubes encapsulating a Hafnium absorber material , it has Excellent mechanical properties and exceptional corrosion-resistance properties allow its use in the harsh environment of a pressurized water...

I am designing a coil which will have 2100 turns of 30AWG wire. The bobbin diameter is 1.045" and the length is 1.28" From my calculations I will use about 8,420 inches of wire. I tried an online calc but they did not take into account that the wire I am using has a heavy insulation so it's...

I have a question regarding an oscillator design from a controls perspective. An ideal harmonic oscillator has just 2 poles, both on the imaginary axis, and their location along the axis determines the frequency of oscillation as well as the amplitude. Now, please correct me if this is...

i have to design gears for a screw jack. i have initial rpm 1500 and final rpm 100. my gear at the point of the power screw is 0.04 m and i want to calculate the diameter for the other 3 gears. can you please help me thank you

I am building a little balsa wood model. I was hoping there was a program to help me test designs before I spend hours gluing sticks together. I've used a 2d program for testing bridge designs, but I've never seen a 3d version. I'm hoping this question is cake walk for you guys. Also, I...

Hi. I'm building a small automated robot that will only work with 2 motor, 2 wheels, and 2 sensors. My goal here is for this little robot to make through a track without falling off. Here's a little sketch I drew on Paint to help understand what I'm saying. Each sensor will be connected to a...

hi.. can someone help me out with noise in engines.. i am specifically interested in noise due to running of chain on sprockets.. it is a sort of whistling noise... which are those parameters in design of sprocket and chain which contribute in noise.. we can also talk in terms of different...

Hi there! I am an engineering student and I have a project to do. It involves creating a heating/cooling system for our shoes. Well the instructoor asked us to choose a heating cool system so I chose this topic (assuming it would reach some where where I would get a patent for my hard work). So...

If specs on a 300Hp electric motor; 480 Volts 3 Phase 60Hz The full load Amps of the motor is 361A, which I found in the NEC table. My distance is 700ft to a control center and I can't seem to figure out what copper conductor size to use. In order to find the Voltage drop I have to know...

Hi This is my first time on this site and it looks great so far. It doesn't matter if it is 12v or 24v either will do which ever is the easiest. What I would like is to be able to run say up to 6 12volt 5 amp water pumps for my hydroponics individually say every 2 hours for 10...

Hey all, If I understand correctly, transition frequency is synonymous with the unity-gain bandwidth frequency. With that said, if you divide the gain at the operating frequency by the transition frequency, you should get the operating frequency. Please correct my logic if I am incorrect...

Hi all, I am a second semester junior mechanical engineering student. I am taking a class titled "Mechanical Engineering Design." The class has a design project where we pick a problem and design a solution. He does not want something a freshman engineering student can design, but rather, a...

Hi all, I need a voltage to voltage converter design(circuit) from DC +/-5V to +/-15V Thanks...

Hey! New to the forums here, and I wonder if you guys could give me some help. I've got a problem! :D Problem: Let me give you the scenario. I've got some GPS equipment that runs on ignition, constant, and ground. I have a barge that has two motors, and two ignition switches. I need to power...

This is probably an extremely awful question to pose at this point, but I feel lost. I'm in my Junior year at 4 year uni after transferring from 2yr college and the jump seems so huge. One of things that is giving me headaches a lot this semester is learning how to design with extremely little...

Hello, I am designing LC low pass filter for single phase sinusoidal pwm inverter, where the cut off frequency is f = 50 Hz. And i have to chosse L, C such that: f = 1/2π√(LC) but there is many combinations of L and c that result in this cut off frequency. So my question is, how to choose...

Hey everyone, I'm looking for some references on solenoid design - core materials, geometry, etc etc etc. Can anyone suggest me some canonical references that I should check out? All the books I've found are from the 60s or so. Thanks!

Hi everyone! First post on this really awesome forum! I'm thinking of an AC-adapter for hot-shoe flashes, which are usually powered with batteries. Here a guy describes his unsuccessful attempt: he built a wooden battery pack with contacts at the right place and connected to a universal...

Design a noninverting voltage amplifier which can be varied between 1 and 100 capable of driving a 10 K load to +5V at a frequency of 1KHz. Also how do i design same thing with inverting. Can any1 help me schemetic with multisim or pspice. also make me understand how we should...

Elevator design -no electricity supply? I hope someone can help me. I'm designing a building for uni that requires several lifts (elevators) which transfer bicycles and pallets vertically. My tutor suggested to look at energy efficient lifts. He mentioned that he had seen a lift, which...

Hey everyone, I'm in the process of designing a rocket that could achieve high(er) altitudes. Of course, I want to make the rocket as small as possible, but maximize the height. I understand that the Mass fraction of the craft should be 0.91, where 91%~ is fuel/propellant, 6%~ is payload, and 3%...

I need to design an electric circuit which require PWM to let the battery and supercapacitor take turn to supply current to the loads. stage1: battery charge up supercap and supply current to the load stage2: supercap voltage increase to a certain level, battery current is cut, supercap...

Good Evening, I am currently desiging a heat exchanger to heat Air from 10 oC to 110oC and cool flue gas from 1259.4 oC to 725 oC. As both fluids are gases, i would like to know if it is advicable to use a shell and tube heat exchanger? Could you suggest a heat exchanger type please ...

I'm making a portable generator box, and I'm currently designing the baffles. The design is quite similar to this: http://media.photobucket.com/image/hush%20box/Audiomechanic/ProjectorHushBox1.png There will be an extra wall on the left and right to accommodate louvres on the exterior...

I am going to put a digital panel meter on my boat to measure the battery volts and a few other things. For this, I need a DC power supply for the meter with a negative which is below the boat ground. I could easily use a 9V battery and a push button to keep it on just for taking readings...

Howdy - We're a small nonprofit that hosts a single annual event. For advertising this event we construct a large sign on a hilltop that's visible from the nearby highway. In years past this sign would last a few weeks before it would be destroyed by wind. Obviously our guess on how strong...