Design Definition and 1000 Threads

I want to design a simple home use electronic wacky talky. Please help.

Friends, I want to know the methods involving the airfoil design and optimization. from initial step onwards...how to start my works.

I am looking for some insight with a problem I have. I am trying to design a foundation that is partially under the current water table. It is a hollow rectangle that is 30 m long, 11 m wide and 9 m high with a wall thickness of 0.5 m, it is attached to a triangular shape foundation that is 35...

I need to design a basic setup to rotate the workpiece in Die Sinking EDM Process. I made some design but they were complicated and were not easy to fabricate so I need someone who can help me.

I am creating layout of cmos inverter in cadence virtuoso using 0.18um technology. channel length is 2Lambda = 0.18um I read that contact should be 2Lamda X 2Lambda that is 0.18um X 0.18um right but my LVS Check is throwing error telling that contact must be 0.22umX0.22um whats might be the...

For the above op amp circuit: Vin= squarewave with 10Vpp and 1kHz. C=0.01uF. Vcc and -Vcc is 15V and -15V. Using the above specs, I calculate R using these equations: Requirement: Create a triangle wave with output voltage Vo to be 10Vpp. This is a gain of 1. Using the above, I find...

Hi There, I'm in the preliminary stages of building a spring powered car to race over a distance of 10 metres. It is a yearly event held in my local area and so far we've only seen one spring powered car. I think this is because it may be difficult to design a way to harness the energy...

I need to design a CAM composite with a spring for an exoskeleton to aid elderly mobility. However, the problem I face right now is that the CAM I designed provides a linear force profile, i.e., the force varies proportionally with the extension of the leg. How can I delay this force applied so...

Hello all, would like to ask what seems to be a general rule when designing power systems. In the power system design program which I just started to use. It is advised that: For every simulation to be run, it is best to have a "flat start" before running any faults. I'm not too sure...

I was just assigned a design project to work on and this is my first time doing something like this and I'm not sure what to do! I would like useful advices from experienced people regarding what type of product should a first-timer like me choose to work with? It's telling me to "design" so I...

the front end is a slo 100 on a soundcity 120 guitar amp, this was when I didn't know what I was doing (and I still don't :redface:) but tell my design mistakes, the output transformer was what came with the soundcity 120, sadly during a move I lost all the parts to the amp, still I'd like some...

Homework Statement "Determine the design angle θ (0° ≤ θ ≤ 90°) for strut AB so that the 400-lb horizontal force has a component of 500lb directed from A towards C. What is the component of force acting along member AB? Take ϕ = 40°" Homework Equations x-component: magnitude*cos(θ)...

Hello, what PCB Design program do you prefer? What's the reason for your choice? I am freshman to PCB design and working on PADS from Mentor Graphics. But I have to admit it seems me a little bit unintuitive and I am unhappy with non-perfectly fitting transmission lines and prolonged editing...

I Need to design a Vertical cylindrical water tank to be build by Fiberglass. I need to calculate the tank also for 7.5 m bar pressure and 2.5 m bar vacuum pressure. Tank Dimensions to be 4m Dia, 5 m High (60000 Liters). I have Fiberglass laminate of 6 mm Thk and Modules is 1470000 psi. I have...

Hello! My friend and i are interested in doing a project.My area of interest in Fluid mechanics and my friend's is mechanical design can you guys help us out by providing some topics of research which encircles both these areas.

Hi, I just started my first job and I have to complete one unfinished project. This is a dust collector system and i have the ducting blue print but I am not sure how to calculate the friction losses in the ducting. I have the dust collector in place plus the ducting diagram, need some help with...

I want a design for a small 15 cm long beast wolf I can use- -wires -motors -rubber bands -cardboard -matchsticks :thumbs:

Hi, I've been trying to teach myself electronics. I have read a lot of introduction books and now want to build a circuit. However, I have not been able to find good books on how to assemble simple circuits. In other words how the parts (resistors, caps, coils, diodes, transistors) go...

I'm trying to design mechanism similar to this video https://www.youtube.com/watch?v=t1JNWnTpmkA where i have concentric rings that spin within them selves around x, y and z axis. I intend to use track roller cam follower bearings to support each ring, with a bearing width of 10mm and a...

Hello All ! Above is the title of the topic and am looking for inputs. Right now I am working on this as my thesis. And I am looking for some one how have already worked in the similar field for a better guidance for me. Thank you in advance. Regards,

Dear all, I am following Shigley's Mechanical engineering design as a textbook for my course of machine design.But i would be very thankful if anyone gives me some references books of machine design in pdf format containing more and more problems.It will be helpful also if you can provide any...

respected members I need advice I am taking course on embedded system & vlsi design I have to make project but here is two domain (embedded system & vlsi design ) where I can make project on one domain VLSI or EMBEDDED. but for learning purpose I want to make project where I can use both...

Hey guys! I am currently creating some automated snips for trimming plants. I am using auto desk inventor to design it all. The design and concept is solid and modeled/animated to show proof of operation. However now i want to try prototype - i can sort out everything aside from the gear. I...

hello. I'm designing a 100w 4Mhz class E amplifier. I need a ferrite core transformer for impedance transformation and load isolation but unfortunately I lack the knowledge required for designing it. if anyone could guide me to a good book or a web page, or simply give me some formulas I would...

I have a pretty specific problem that I'm trying to solve and I'm out of ideas. I can't divulge too many details, so I thought I'd use an example to describe my problem in general terms. I'm not sure if it's really possible to brainstorm using this forum, but I thought I'd give it a shot...

Homework Statement You are given two ideal batteries with ##\epsilon_1 = 1.5 V## and ##\epsilon_2 = 9.0 V##. You are also given three ##120 \Omega## resistors.You may use any or all of the components. Design a circuit where there is a current of ##21 \pm 1 mA## through at least one of the...

Hi, I just went through the PhD programs offered by this university. They have 4 pillars...as they call it..one of which is Engineering Product Development (EPD), which I am interested to pursue. From what's given in their brochure.. "EPD pillar’s mission is to prepare graduate-level leaders...

I have a tub randomly filled with light longitudinal parts like pencils or matches. My goal is to gather them into a buffer nicely aligned (independently of which end is facing side). What's the fastest way to achieve this? I have considered unconventional bowl feeder with substantial radius...

Hi all, I am rather new to the forum and am a second year mathematics and physics student if that has any relevancy to the question I have. My passions involve studying things like ballistic trajectories, missiles/drones, explosives, and other sort of weapons with possible military/defense...

Hello I wonder if anyone here might be able to help me. I am writing a children's book called The Wing Giver about a boy who wants to fly and a Spitfire pilot. However words are my thing and physics isn't! In the book, the boy wants to solve a formula his dad has set him which is to work...

hey guys For the last year, I've been learning and working in solidworks, mainly youtube videos, reading tutorials, manuals and solidworks support . But I don't know when you reach "PRO" What (else) Can I do to improve my solidworks skills.

Recently I've started to investigate Spacesuit Design and different aspects of it. I was just wondering if anyone could provide me with some preliminary books or websites that I could use to get my research going, I would greatly appreciate it. P.S If my post is in the wrong forum just tell...

anyone know what the metal fin-like structures are? i see these on a lot of LED bulbs. they look like heat sinks but if conventional bulbs don't need heat sinks why would an LED bulb need one? besides! i thought the conductivity of semiconductors was proportional to temp.

Hello everyone, I have a few projects in mind that call for various sized solenoids. I have been experimenting with various gauges of magnet wire, however, every time the battery is connected, it gets too hot to hold. with that being said, is there a way to calculate how...

I have just joined the forum so please be nice as I'm not an engineer. lol Thank you for any and all help. I wanted to tap the knowledge here because my brain hurts... I'd like a better understand of how to get the answer not just the answer if possible. I am designing a mechanical...

I want to design a single phase induction motor (1/3 HP,50Hz,220V). I face a problem to design the main dimension of stator and Slot shape and Rotor skew angle . Would you give some idea for design ? or any related book and software ?

I have read a discussion about a centrifugal fan on a wheel system The fan pulled air to itself and push the air outward from center. Most flying machines that I aware of push air down, as Newton describes. Since air is move downward, but toward machine could a new drone work this way...

hi friends, I am going to program a double pipe heat exchanger designer software and I need to every detail on heat transfer and mechanical design considerations. I've read some on double pipe heat exchanger on net like this http://scopewe.com/double-pipe-heat-exchanger-design-part-1/ guide...

Quick facts: Age (19) / Mech. Eng. Sophomore / Automotive & Physics Lover In an attempt to design and construct a new less restrictive engine intake system I've run into a number of questions I am not yet able to answer. Main Goal: To produce a new intake system and associated plumbing...

Hi I had a neat idea for a relay design, basically its a relay that takes very tiny movements to open/close a circuit, I.e. I can make a 10 micron movement to create/close a 1mm gap very easily and in a small package (3mm by 10mm by 20mm say) and with a fairily large contact area (for that size...

hello this is the first time I'm using this forum so I hope that my post is in the right sub-forum I'm working now on a project for water treatment , I don't know exactly how to design the setup of the experiment. what is needed 1- 50l feed water tank connected with a pipe , I have to...

Hi Physics Forums! I've been browsing these forums for a while now and not actually joining in.. Now I'd like to ask for your help! I'm about to enter into my final year of my degree in Automotive Design and Engineering and need a project. I need to re-design a part of a car and engineer...

Axial flux alternator is an easy to make pancake of stationary coils between spinning permanent magnets. Having made one and played with it, i ended up with a few questions. Would it make a good motor? There are axial flux motors for sale, and my alternator spins nicely when hooked up to a...

The Little Rocket That Could [Figure 1. Check this out.] This post illustrates an example of KSP rocket design. The following are the rocket's design goals: Get three kerbals and a bunch of science items to the Mun, in an Apollo style mission: such that two kerbals (and science) land on the...

Hi there - this is my first post here so apologies if it is not in the correct sub-forum. I am working on a passive solar powered pump that uses pressure built up by heat in a closed cylinder (expansion chamber) to displace water from a sealed reservoir to an elevated target tank. I am...

Hello. I'm trying to design a AC to DC LED driver with PWM dimming. I have a design that I can use with the LM3406HV but I would like to design something that I can wire up 110V AC mains line. With the LM3406HV I need a DC power supply. I was thinking about using a switching power supply but if...

I believe artillery guns and barrels that are highly pressurised often use shrink fitting (heating up a tube causing it to expand allowing it to be fitted over a smaller tube which it will apply an inward pressure on when it cools) to oppose the pressure from inside the barrel. Could this...

Hey guys, I have been trying to design a constant current source that has a digitally controllable (μcontroller) range of maximum current outputs. Ideally the source would be able to be adjusted from .25mA to 2mA. The input voltage for the source would be in the range of 9 to 14 volts. Also I...

I have two exam question (embedded computing system) Q1. write short on embedded computing system design process Q2. write short note on specification I am confused how to write answer for this questions for Q1 Embedded system made with both hardware and software I know about hardware...

when designer design new circuit, they think what's the requirement step I 1)power dissipation should be less 2)raise time and fall time should be less 3)propagation delay time should be less 4)size should be small as possible step II 1) how can we reduce power dissipation in cmos...