Design Definition and 1000 Threads

Hi friends, I am studying this circuit which is the first all electronic television receiver created by Dr. Farnsworth back in 1927. Triode are being employed along with some caps and coils. The design is very simple and clear, basically this receiver is a detector circuit which detects the...

I think I know the answer,but just to make sure. I have two coupled inductors through a core that provides better flux permeability, aka a transformer, I provide say 5v and 1000 amps AC to the primary loop, in my secondary loop I have a capacitor in series with the loop (of sufficient...

Hi all, I'm fairly new here. I'm currently designing an as-homogene-as-possible permanent magnet for low-field NMR and similar experiments. I'm on a fairly tight budget, and having finally found pole pieces for my magnets, I got them even though they have a small saw cut in the edge. approx. 5...

Hello , I have an medical device assembly, where I trigger the needle for injection, mechanically, with a pretensioned spring. Injection takes 3 minutes, then I have to retract the needle. How can I trigger the needle, using an electrical impulse ?

Hello, I have a question about electron guns. I have read a lot, and all designs use high NEGATIVE voltage (-1000v for example). Is possible to use high POSITIVE voltage like this drawing?. Or do you think it will not work this way? Considering that all the chamber walls are at ground voltage...

Hi Everyone, I would like to measure voltage output from a sensor via an Arduino. The sensor outputs 20 mV at max capacity. I'd like to bump this up to around 5 volts so it is easier to measure. My plan was to use a non-inverting topology coupled with an LM393N op-amp. The schematic for a...

Hi folks! For those of you who are familiar with ellipsometers, are the following some significant pains/problems with the apparatus? Are there other significant pain points? 1. The machine is too bulky. 2. The change of angle is too slow. 3. The minimum angle is limited by thickness of arms...

Bolt comes out by distance d=1.58 mm when speed of rotation of shaft reaches its trip value (w_trip). m is mass of trip weight (Bolt assembly) One of the approach which I had considered is work energy theorem. Initial energy = 0.5m*(w_trip*(r+d))^2 Final Energy= 0.5m*(w_trip*r)^2 (Assuming bolt...

I’m wondering what skills are needed to go from being a project engineer (in the construction industry) to that of a mechanical design engineer? More specifically, what exactly is an employer looking for when they hire a design engineer? We all know that any good engineer should have great...

Hello. I've built this syringe pump. The chosen motor is a NEMA 11 with a maximum torque of 6 Ncm. The thread rod is an M5 with a pitch of 0.8 mm. The whole system will consist also of a long tube (1 m length, 3.175 mm external diameter, 1.5875 internal diameter), at the end of which I'll need...

I have a project which consists in making a tennis ball launcher for training kids (6-12 years), but there is a catch, the mechanism can't have any elastic parts (springs, bands, rubber). It has to be purely mechanical. I need help

How do you increase torque in gerotor design other than increasing flow. Will lengthening it increase torque? Will increasing diameter increase torque? What about running 2 or 3 in series?

Hi, I am making a half bridge power amplifier that operates at 24 V. The bridge has to supply around 3A current to an inductive load (10mH) The bridge will be controlled using 20kHz PWM from a microcontroller. I have put a ACS712 current sensor in the load path to give feedaback to the...

I found this interesting engine design on the internet. It is one of the most powerful and largest machines human have ever designed. It is a fusion powered propulsion device, it uses “heavy fusion technology” which can use any elements lighter than Fe-56 as power source. Is this design feasible?

What is the method to design a Non - Telescopic, Non - Linear, conical compression spring from a Force - Deflection characteristics

I've been working on modifying the cyclotron particle accelerator. Tell me what you think? It's pretty basic though

I am working on a design for a water powered drive shaft. The water source would be from a 2.5 inch diameter hose, at approx 75-100 psi. The goal would be to get 55-115 RPM from the shaft and max torque in the smallest possible handheld device. That being said, it seems my best options for...

I remember a while back someone told me that there exist programmers who don't believe in null. I thought that was a crazy idea. Until recently, as I've gotten better at OOP and have figure out that if my object has a property that is allowed to be set to null, it usually means that I am not...

I am going to graduate this year with a bachelor in electrical energy engineering, i am very passionate about designing and fixing problems, i would love to work in the R&D department of some multi-national company, but i don't know where to start. What qualifications do they usually ask for...

I need to design a mini projector as a part of a project I am working on. The body of the projector is approximately 7 inch tall and 5 inch wide. I don't know what kind of a lens I need to ensure the projection is sharp and crisp (it is only black and white writing). I know I would need a zoom...

[I've searched the site and did google. I couldn't find a satisfactory answer] I have the motor characteristics and the moment of inertia of the object I'm supposed to spin with it. I have to design the shaft considering the torsional failure. Now, if I consider the inertia of the body, there is...

Homework Statement Design a 4-2 priority encoder with active low and enable. Homework EquationsThe Attempt at a Solution Here's my work , but I don't know how to connect the enable input. Any help would be greatly appreciated ! ##A = \overline{I2}+\overline{I3}##...

Let's say I have a service that publishes events, like eo ("Bought 100 shares of AAPL") e1 ("Bought 100 shares of T") e2 ("Sold 500 shares of TSLA") and there exist stateful services subscribing to the events and whose state depends on the events being processed successfully and in the correct...

Homework Statement a) Design a 3:8 Decoder using 5:32 Decoder. b) Design a 5:32 Decoder using 3:8 Decoder. Homework Equations - The Attempt at a Solution a) b) ( X3 and X4 are grounded , because we need 3 inputs only ) Could someone check my answer please ?

Homework Statement Homework Equations - The Attempt at a Solution Here's my work : When I added 0000 0001 to 0000 0000 , I didn't get the correct answer . Could someone check where is my mistake please ?

Homework Statement How to design a 2 to 4 Decoder using 4 to 16 Decoder ? Homework Equations - The Attempt at a Solution Truth Table : A B 0 0 0 1 1 0 1 1 ( O3) Is my answer correct ?

Hello all, I've been entrusted a project of developing a Vacuum Drying System for my company. This system will be used for instant drying of automotive parts after washing. Needless to say the parts will be wet and at an elevated temperature (approx 50 degree C). The requirement is to dry the...

Which Design courses are available in Electrical engineering for getting good job opportunities

I have been reading up on clear-air pulsed radars and am wondering if it is possible to scale down a large radar system to one with reduced power and gain, but also greatly reduced range. Here are the specs for a large radar: Output power = 2.5 mega Watts Antenna gain = 47db. Range = 15km. If...

Let me describe the problem I see as an engineer when a business wants to create microservices out of its "monolith" (a term used derisively to describe an existing service that works quite well). You have X that you want to divide into A, B, C, or maybe A, B, C, D, E. So you want to create 3...

What is the coefficient of drag on a flat surface? Note: The body is in free fall The object has 2 wings planform (it's a paper helicopter), which is flat The object's wing spin in a circular motion (anti-clockwise) during free fall

Homework Statement 51300 kg/hr caustic soda (= 1.115, = 0.349 Btu/lb ∙ ℉ ∙ ft) leaves a dissolver at 190℉ is to be cooled to 120℉ using water at 80℉ which will be heated to 120℉. Knowing that the specific heat and the viscosity at the mean of 0.88 Btu/lb ∙ ℉ and 0.76 cp respectively. Plant...

Hi! Given that the chamber is airtight and no air leakage occurs, is the design in the picture below possible? Can the pressure inside the chamber cause the button (black part at the top) to be "pushed"? https://imgur.com/a/wOSD30D Obviously the temperatures are over-exaggerated, but the...

Below I've attached a sketch of the rig designed to wear down the gears.f Firstly my project idea is to test the durability and overall wear of plastic & 3D printed gears however the 3D prints will be electroplated to see what difference it potentially makes. The idea of the rig is to have a...

Homework Statement It is desired to heat 5130 kg/hr of cold benzene from 80 to 120℉ using hot toluene using double pipe heat exchanger. Toluene will be cooled from 160 to 100℉. The specific gravities at 68℉ are 0.88 and 0.87 respectively. A fouling factor of 0.001 should be provided for each...

Hello, I am looking for resources that show you how to design an simulate and engine from scratch. I want to design a complete engine using CAD. Afterwards I would like to analyze the engine using FEA and CFD (Heat transfer, fluid flow etc.) simulations. This is all for learning purposes. I...

Let's suppose we are given a set of requirements and we are to design a motor that meets them. Requirements are: 3 phase synchronous, 480v, 50Hz and of hysteresis type and alnico is the only available option and it should deliver a 0.6N.m output torque. Dimensions should not exceed 150 mm and...

Homework Statement 2. Homework Equations 3. The Attempt at a Solution For the first set of questions: I've worked through to part 6), at which is I encountered my first problem. I'm not entirely sure what the question is asking. Is it as if there would be a capacitor between...

Can anyone recommend a place to find case studies in electronics design? I am looking for concrete examples of the engineering process from requirements definition through PCB layout. As a physicist who designs instrumentation I would like to improve my improve my design process and employ more...

Hello all, I am after some advice regarding a hall sensor type air flow meter. I know from experience that most hall sensor flow meters allow a bypass of fluid around the turbine/fan. However I would like to know what would happen if this was the case of the design below. Specifications...

Hello, We just finished up midterms and I actually did well--got an A. However, somehow between the midterm (class before last) and last class we jumped to creating a circuit with a diode. I am pretty lost. 1. Homework Statement Homework Equations Voltage / Current = ResistanceThe Attempt...

good afternoon I would like to design a self-reversing screws for a small personal project, but I can not find anything to be able to carry it out, as well as measurements, thread pitch, gypsi, ... to see if you can help me

Hi there! I am currently making a design about drive systems used for micro-hydro scheme. I don't know what type of driving element is suitable to used for transmitting the power from a turbine (cross flow turbine) to a generator. I'm planning to use both chain and sprocket & V-Belt Pulley which...

https://en.m.wikipedia.org/wiki/Table_tennis_racket Would like to know the impact for the table tennis game if the racket is changed to a String type Lawn tennis or Badminton racket? Thanks & Regards, Prashant S Akerkar

Hello, I'm a student of mechanical engineering and I'm doing a project for my university in order to graduate. Right now we are doing the design for the boom of the crane but I have some doubts according to the analysis we could say is the FBD part my team says that the beam is considered as fix...

Two pontoon boat design approach and how to find center of gravity, center of buoyancy, buoyancy, volume of displacement, meta center, meta centric height. I need to know is there a different approach to designing dual hulled boat than a single hulled boat and all the formulas and examples I...

I have currently only worked on resistor networks and gaining the skills to analyze them. I am now beginning to learn about RL, RC and RLC circuits and still I don't think this is enough knowledge to create my own circuits. To create a circuit you must have a function in mind as in "what do I...

On p. 566 (Section 563) of Hamilton's Lectures on Quaternions, I find "Operating with phi, and making reductions analogous to those of recent articles..." The 2nd derivation, beginning with "phi rho prime" so far totally eludes me. Let me apologize if this is the wrong forum. Quaternions have...

hi, I'm designing a 50ftx50ft, 8-cable Cable Driven Parallel Robot and am thinking this is a pivotal decision. the corner posts are 10ft tall and the machine should be able to lift 100lbs at least 5ft off the ground. traveling speed of the end effector is less important than accuracy but I'm not...