Questions tagged [engineering]

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-2
votes
2answers
57 views

Installation that suspends a 24ft tire mockup in mid air through optical illusion or maglev, anyone interested in a paid collaboration? [closed]

We are working on a project for an esteemed client and request your assistance in brainstorming the design Brief - Permanent structure outside Delhi airport (Tire floating/appears to float in ...
35
votes
5answers
12k views

When Intel / AMD choose their Nanometer Processes, why were the specific numbers, 5, 7, 10, 14, 22, 32, 45, etc chosen?

When looking at the roadmaps for the CPU manufacturing process https://wccftech.com/intel-expects-launch-10nm-2017/ 10 µm – 1971 6 µm – 1974 3 µm – 1977 1.5 µm – 1981 1 µm – 1984 800 nm – 1987 600 nm ...
1
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3answers
51 views

Question about RLC circuit and struck in a problem, in the calculation getting current as infinity for the given values

Question about RLC circuit and struck in a problem, attached the photo related in the calculation getting current as infinity for the given values.any idea how to move forward
0
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0answers
32 views

lyapunov function derevation

hi could you please help me to know how did they find the derivative of V lyapunov function
0
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0answers
26 views

Split Inverter Air Conditioner installation location

I'm an working for an organization which provides solutions for Air confitioning in sri lanka. I came across this issue few weeks back and still tring to solve it. Anticipating Your utmost support. ...
0
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0answers
50 views

Understanding MOSFET circuit

I don't understand how I can find RS, RD and RG so that ID=.1mA. Help.
0
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2answers
80 views

Designing a Moore sequence detector using three always blocks

Trying to implementing a Moore state machine using three always blocks. The Moore state machine has two inputs (ain[1:0]) and one output (yout). The output yout begins as 0 and remains a constant ...
0
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0answers
24 views

Need help to convert Reverse Engg files to Garber files

i've generated .nod .par .edf .dfx .pdf and many other files from reverse engineering of a PCB. how can i generate Garber from these files?
0
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1answer
76 views

Not understanding NPN transistor in circuit

I'm sure an analog of this question has been asked before, but I've spent the last day researching this and I've decided it's time to reach out for some help. I'm working my way through Electronics ...
0
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1answer
57 views

Can I design a photovoltaic system, or is that unrealistic?

I'm new to stack exchange, so ... feel free to ask for clarification, as many posters seem to be rather vague on their questions, from what I've seen. A little background: I'm a recent graduate in ...
0
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3answers
100 views

How does a transistor sweep generator work?

In particular I'm wondering about oscilloscope sweep generators, but the concept I don't understand remains the same for any type, which is, what does the triggering? I know a transistor can be ...
0
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2answers
34 views

EFT Simulator Duration Time Setting / IEC 61000-4-4 / KeyTek CE 40

I've got an antique EFT simulator, it's a KeyTek CE-40. I'm debugging a device for EFT as per EN 61000-4-4. The manufacturer doesn't provide support for the device anymore and I don't have a product ...
-2
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3answers
83 views

What does “p-p” mean in a spec sheet?

I've been searching for what these unit abbreviations mean, and can't seem to find anything. I'm hoping for some help. I'm looking at a spec sheet for a Vacuum fluorescent display For the Grid and ...
0
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2answers
106 views

What do you do to help you grasp a concept or understand something you're seeing for the very first time?

Often in industry you come across a lot of different devices or even concepts you're seeing/hearing for the very first time. Things like encoders, resolvers, PID, pressure transmitters etc. I would ...
1
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4answers
81 views

Special soldering requirement

I have a special requirement on soldering which I do not know how to achieve. I now need to solder cable to large copper part, which require high solder power. On the other hand, the temperature of ...
0
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1answer
49 views

Microphone Pre Amp Book? [closed]

I'm wondering if there's a book that discusses resistors, capacitors, inductors, transistors, transformers, impedance, op amps, power supplies, and the general circuitry of a microphone pre amp. Thank ...
1
vote
1answer
41 views

Graph theory for Networks

To use the formula, [Bf][Zb][Bf'][I] = [Bf][Zb][Is] - [Bf][Vs] for the concerned, or any tree, should [Vs] and [Is], be written with respect to the directed tree I've taken, or with respect to the ...
16
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6answers
2k views

Does the word voltage exist in academic engineering?

In Portuguese, the word voltage does not exist. Neither academic nor technical. In engineering, Portuguese speakers refers to volt as electric tension or potential difference. The word voltage was ...
0
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0answers
87 views

Whenever two system or sources are coupled they should have same current sink or common reference point (say ground). How to realize this in ECG?

Electrode (Ag-AgCl) are placed at different part and directly fed to positive and negative input of differential amplifier. How can we realize human body and amplifying system have same current sink ...
1
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1answer
81 views

Does these terms consider the same Voltage, electric potential, and potential difference

What are the differences between these terms ? do they are considered the same
-1
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1answer
80 views

Can you connect transistors directly to high voltages or is there precautions neccesary?

I understand that the circuit above will simply work, but what if the voltage input from the battery is significantly higher and the necessary voltage for the motor is high as well? Can you still ...
1
vote
1answer
146 views

Find rotor stator loss in a 3 phase delta connected induction motor?

I'm trying to work out stator input power of a 3 phase delta connected induction motor. I have the equation Stator Input Power (P1), where P1= Pm + rotor copper loss + rotor stator loss. I have Pm ...
0
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2answers
421 views

Should startup torque be higher in value than full load torque in an induction motor?

I found out values of my 3 phase delta connected induction motor for full load torque, maximum torque and startup torque. My maximum torque was higher than my full load torque, but the thing I'm ...
1
vote
1answer
139 views

Torque in a 3-phase delta connected induction motor

I know the equation for torque is T=[m*(N2/N1)^2/2*pi*Ns]*[s*E1^2*R2/R2^2+(s*X2)^2] N2/N1 is the effecting rotor-stator turns ratio. I have it written ...
1
vote
1answer
86 views

Finding value of slip in an 3-phase delta connected induction motor

I know the equation for slip is s= (Ns-Nr/ns)x100 and that to find Ns is Ns= f/p. I have been given ...
1
vote
1answer
89 views

what is cut off current in dc motor?

This question is conceptual question. May it is easy for engineers to explain cut off current in DC Motor. In our formula, we are finding motor torque, $$T_{motor} = C_{motor} \times (I_{cut} - I_{...
0
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3answers
322 views

Using Thevenin's theorem, how do you find the Thevenin voltage?

The above image shows a circuit. It is required that we simplify the circuit using Thevenin's theorem to find the Thevenin voltage, current and resistance. I've done a countless number of problems ...
1
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1answer
386 views

Bjt circuits, “Vbe = 0.7 at edge of conduction”

could you explain what "eoc" and" eos" (edge of conduction and edge of saturation) is? The problem says "Vbe = 0.7 at edge of conduction" , is that in cutoff mode?
0
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1answer
51 views

In which branch of engineering can I learn about display technologies like LCD, LED, OLED? [closed]

I am finishing high school this year and want to pursue a career where I can learn and develop display technologies like LCD, LED, OLED, and flexible displays. Can somebody please tell me what branch ...
10
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2answers
3k views

Why does the current not skip resistors R3 and R5 when R6 and R4 have no resistance?

I do not understand why the current still flows through resistors R3 and R5 when R6 and R4's resistance is 0. To me, it would seem that the current would skip R3 and R5, however the answer key says ...
0
votes
4answers
701 views

Is electrical designer same as electrical engineer? [closed]

A job I'm interested in has a title of "electrical designer". The qualifications are either a Bachelor of Engineering or Electronics Engineering Technology. Is this not an Engineering job? ...
0
votes
1answer
87 views

Assemble Peltier Cooler to Li-poly Rc Battery

I have procured a thermoelectric cooler (TEC, this one) and my purpose of the TEC is to produce current for the Li-poly RC battery to increase its battery life. The Li-poly RC battery has 7.4V stated ...
0
votes
1answer
81 views

How do I convert 1/3 to signed float 8 bit?

The formula is as follows: (-1)^[signed bit] * (1.[significant bit]) * (2^[excess bit -3]) or (-1)^[s] * (1.[f]) * (2^[x-3]) It is a question posed by my signals and systems instructor, hence the ...
0
votes
3answers
186 views

Alternative to alternating relay? or help?

I'm using a littelfuse relay shown in the link to switch motor directions. I'm sending a pulse to the relay switch of 0.02s in order to switch between the L1 and L2 contacts. The pulse seems to be too ...
1
vote
1answer
108 views

What is the relationship between Ground Potential Rise (GPR) and Source Voltage?

I am looking at the results for an earth grid study for a 50Hz substation. Primary Voltage (Vp) = 11,000V Secondary Voltage (Vs) = 415V Secondary Fault Current (If)= 24kA Secondary Grid Current (...
1
vote
2answers
741 views

Detecting Open Circuit, Short Circuit and Battery Reversal

I am facing various design challenges with a project that I am currently working on. I've been trying to figure out a way to build a circuit that detects open circuit, short circuit, and battery ...
4
votes
1answer
1k views

MOSFET: How can I find conduction parameter and transconductance based on graphs?

So I have my graphs (below) with various MOSFET characteristics. I don't know device dimensions or geometry, therefore I can't solve for the 2 directly with an equation. Otherwise I would just do that....
1
vote
2answers
96 views

Does this look like a correct Bandpass filter?

A project task assigned me to make a simple series RLC bandpass filter with values B = 73kHz & freq center = 4.8MHz known. I use equations B=R/L and fc=1/(2pisqrt(LC)) to get the RLC values. ...
2
votes
3answers
704 views

Advice for 25-50 Mbit SPI lines - PCB design

I would like to ask some advice for my layout design. I am working on a layout design. The designed PCB will be a Beaglebone Black (BBB) extension card. It is a four layer PCB with the following ...
0
votes
3answers
299 views

Is a normally high switch the same as a normally closed switch?

I'm very much an amateur when it comes to electronics so apologies for the stupid question. I have a switch that is normally high (5V) and then when i hit the mechanical button it drops to 1V. I need ...
0
votes
1answer
44 views

Where does the indicated negative voltage terminal lie on this circuit?

Does the negative voltage terminal lie after the 150v source ?
0
votes
1answer
27 views

How to get the Forward voltage of a tachometer?

I am currently in the process of building a circuit board for components that I am going to use on a lathe. I want to use this tachometer. https://www.amazon.com/dp/B00VKAT8A2/ref=...
2
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0answers
109 views

Identify this circuit symbol with two overlapping circles [duplicate]

I came across some images of schematics and have never seen this component before - what is it?
1
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0answers
123 views

What is the definition of hull voltage?

I'm studying the subject Electrical Safety in Engineering and a special term really drew my attention. When I tried to google it, no any option was suggested but hull protection. In the presentation ...
2
votes
2answers
56 views

Connector type suggestions required for 12V supply

I made a power supply enclosure with a mains switch and now I need external DC connectors to be mounted in the slot shown. I want to mount two female connectors onto a 3D printed panel, that will sit ...
0
votes
2answers
80 views

Engineering approach to choosing a motor, voltage and gears

I am working on a project to automate the opening and closing of my venetian blinds at home, by attaching a motor with an H-bridge to them. I started with a practical trial and error approach to it. ...
4
votes
2answers
704 views

Capacitor and inductor working principle

I want to know that there is opposition mechanism of current in inductor say back emf than what is opposition mechanism of voltage in capacitor ??? And also want to know that when inductor suddenly ...
0
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1answer
55 views

Can the TFT in LCD displays be made in the nanometer range?

Can the TFT elements and hence the pixels in an LCD display be made in the nanometer range? Say 10nm x 10nm?
-1
votes
1answer
67 views

Toggle between two leds [closed]

I am designing a circuit with not a lot of knowledge in electronics and I am close to finishing it. The finishing part remains. So, I have got a logic 1 or 0 from comp op amp and based upon that one ...
0
votes
2answers
178 views

Where to have PCB with microcontoller designed? [closed]

I’m involved in CNC milling/manufacturing/prototyping, a product we are designing needs an electrical interface that controls timing and dwell on 2 solenoids. This is something well outside of our ...