# Questions tagged [engineering]

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### I want to use acoustic sensors to locate an impact on the other side of a half inch piece of wood [closed]

I am currently constructing a project that will require me to be able to locate an object hitting the other side of a piece of wood. I would like to use multiple sensors so that when an object falls ...
69 views

### What does this sine wave say exactly? [closed]

I am currently just trying to understand how sine waves function and what the readings they're giving mean. I have an example of a demodulated signal that I found and was wondering if anyone could ...
83 views

### Homework Help with Node Voltage

Hello, I just need a little guidance on if I am analyzing this circuit correctly using Node Voltage. Mesh and Thevenin Theorem resulted in Vy= 36V If i leave the ground where it is, the node after ...
24 views

### How would I use PhaseFrequencyOffset correctly in MATLAB?

So I am currently using MATLAB Live Script to run a script with a modulation index of infinity, but at this point im using 5. The programme itself is a synchronous demodulator using a non-coherent ...
24 views

### How to calculate the properties of spiral antena?

I noticed some articles about analysis of Archimedean spiral antena. My understanding is that the antena of such type is a compact one and it allows broadband performance. To be more precise I'd like ...
36 views

### Singular interval condition for Multi input in Optimal control

The definition of singulr interval is shown in Figure. I've struggled with this problem. I think the solution of this prob is "because if the E_j matrix is not singular, it means the System is ...
31 views

### Need some help with nodal analysis

I have this circuit where I'm supposed to find the current I. I know I'll find it by (V3-V4)/R10. I have done the nodal analysis, however, my teacher says that I have done my nodal analysis ...
50 views

### Need help with this transformer circuit

I need some help with this circuit. I have simplified it in three steps. The task is to find the current I. The values to e(t), Z1, Z2, Z3, Z4, and the turn ration N1/N2 are known. I'm not quite sure ...
63 views

### HOMEWORK: Need assistance inputing Mesh Analysis complex equations into TI89

Good Afternoon, I am having calculator difficulties in regards to inputing my mesh equations into my TI-89. The answer I am receiving is not the answer that was presented in the solution provided by ...
33 views

### Moore Sequence Detector for 2 sequence

I am currently working on making a two sequence Moore machine detector. I am having trouble as to how to have the machine detect my second sequence and how to make a state table with T flipflops from ...
62 views

### Question about nodal analysis with an ideal op amp circuit

Iam trying to do nodal analysis of this op-amp circuit, but iam not quite sure if I have done it correctly or if I have missed something. The op-amps are considered being ideal so there is no current ...
77 views

### How would this circuit work?

This is a frequency doubler from a graphene frequency doubler paper if anyone know the working with substituting a normal transistor instead of a GFET?
54 views

### State machine correct? 4b'1001 sequence detector

[![enter image description here][1]][1] Is this a correct state machine correct for detecting the 4 bit sequence 4b'1001? If any bit is out of sequence reset to the initial state. Once the last bit of ...
623 views

### kcl and kvl what is the difference

I am very confused in the terms of what is the actual difference between kcl and kvl? I don't want to have a question on a test and not know where to apply kcl and where to apply kvl? Please help and ...
54 views

### How can I make a “digital switch”?

It would work that way: An IR sensor is used as input, if it receives some IR signal, the input is 0. If it detects that input, it should output some voltage. If it detects that input again, iy ...
44 views

### Do the bremsstrahlung radiation size depends on the size of the accelerator?

According to https://apps.dtic.mil/dtic/tr/fulltext/u2/a351472.pdf HERMES III, a 16 terawatt pulsed power accelerator at Sandia National Labs, which fired electron beams with peak energy at 22 MeV and ...
58 views

### Can this be simplified even further?

Wondering if this could be simplified even further. Feels like I can do more with the 1000 ohm and the 2000 ohm resistors on the righthand side.
69 views

### What methodology to build an electronic system? [closed]

Electronic engineering is not my field but I enjoy build some very little electronic circuits for fun. When I try to build something, I have no methodology at all: I try, fail and try again until my ...
74 views

### I am trying to find Vc(t) for t ā„ 0

I am trying to figure out how to find $V_c(t)$ for $t \geq 0$ in this.
2k views

### Why use aluminum wire in an (old) TV degaussing harness

I used to take TVs apart for fun (and parts, and learn.) Some of the degaussing coils were beautiful -- nice, thick copper. Others were made out of aluminum wire. If I were engineering it, though, I ...
84 views

### Ideal order to study EE [closed]

I'm currently studying Electrical Engineering (second year), and I have a lot of gaps in my knowledge. What would be the ideal order of topics (Ohm's law, capacitors, sinusoidal steady-state analysis,...
166 views

### Amplifiers without vacuum tubes or transistors?

Are there amplifiers that can work without vacuum tubes or transistors? Is it possible to create a working amp with high power without vacuum tubes or transistors?
13k 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 Āµm ā 1971 6 Āµm ā 1974 3 Āµm ā 1977 1.5 Āµm ā 1981 1 Āµm ā 1984 800 nm ā 1987 600 nm ...
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
33 views

### lyapunov function derevation

hi could you please help me to know how did they find the derivative of V lyapunov function
28 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. ...
50 views

### Understanding MOSFET circuit

I don't understand how I can find RS, RD and RG so that ID=.1mA. Help.
369 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 ...
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?
95 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 ...
59 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 ...
147 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 ...
38 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 ...
92 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 ...
118 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 ...
82 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 ...
51 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 ...
44 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 ...
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 ...
88 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 ...
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
95 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 ...
201 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 ...
563 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 ...
163 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 ...
90 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 ...
116 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_{...
406 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 ...