Questions tagged [computer-engineering]

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21 views

How to measure time taken to run SCPI commands?

we all know that every program takes time to run. Normally in Python, the time built-in Python library would be sufficient to measure time-taken to run code. How may I determine how long a SCPI (...
4
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2answers
341 views

Microscope Camera Windows NT

I'm not sure this is the right stack exchange community to be asking this, but I have a little issue. There's a great microscope-camera from Carl Zeiss (AxioCam HRc) which I got for free and would ...
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3answers
51 views

how can I control 2 stepper motors with RS-232?

Hello everyone this is my first post to the forum. I want to control 2 stepper motors using RS-232 as a way of directly communicating with step drivers from my desktop. I am new to communication ...
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24 views

Has there been any deliberate implementation of combinational logic soft error correction in any consumer-level product, like a CPU/microcontroller?

It is well known that many error detection, mitigation, and correction methods, such as parity or ECC, have been available in large memory banks, like for RAM, for decades now, and even in CPU caches ...
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30 views

2 complement code and Carry, Zero, Overflow and Negative Flags

Assuming I have a negative 8-bit number represented in 2 complement code, let's say -12, what number can I add to it to set all flags mentioned in the title (Zero, Negative, Overflow and Carry), or at ...
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23 views

Arduino Programming IR Sensors and Actuators

Create the circuit below (Arduino) You are supposed to use the following code (must download correct library if IDE is too old): ...
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3answers
38 views

Placing an accelerometer on arbitrary position and define this as the new coordinate system

I'm working on a small home project and I'm looking to use an accelerometer for tilt sensing. I would like to be able to place it anywhere on the object. If I place it in a way that the coordinate ...
3
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0answers
27 views

Is there a solution for USB Multiplexing, i.e. passing data between different devices by sharing/splitting a USB connection?

Forgive me if my title is vague, I will attempt to explain my issue. I don't know if such a solution exists and I have tried searching without any luck. I would like to utilize a passive USB protocol ...
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2answers
46 views

Exclusive Or Circuit in SimulIDE

I have been testing basic circuits in SimulIDE. I created a basic exclusive or circuit that works most of the time. There are two inputs. When both inputs are off the bottom LED does not light up, ...
1
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1answer
26 views

If you have a small fan that blows hot air, and a larger fan that blows cold air against it, what happens to the hot air?

For context, I have a laptop that has a fan that sucks in cold air from the top on the left side (for cooling the cpu), and a fan that blows hot air out the bottom on the right side (for cooling the ...
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16 views

Macro to atomic scale software

Is there a software that exists that takes a macro object for example a MacBook casing and its composition (Aluminum) and allow you to zoom between the macro scale (a fully rendered MacBook) and the ...
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5answers
118 views

What sensors/methods can be used from the roadside to determine if a truck is loaded or empty - without weighing it?

What sensor, using what physical principle, can penetrate a closed rectangular object like the trailer of a truck and tell if the space is empty or loaded? Why is this question relevant? One of the ...
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1answer
43 views

Are pixels not squares and more like rectangles?

When I open Paint, I change the size to 500x500. It appears more as a rectangle than a square. Has anyone else had this happen? Is there an explanation? Not sure if this is a thing that differs on ...
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1answer
26 views

How is the most basic display driven?

I am curious how taking the most basic display such as this OLED one that works with the ardunio is driven: i.e. We are using just a clock and data line to drive a 128x64 pixel display. The pixels ...
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2answers
124 views

Screw type associated with COM port/DB-9

DB9 female port often have female slots for two screws to secure the male plug onto it. What is the type of this screw? Word 'screw' is mentioned 7 times in Wikipedia DB-9 article but not the type. ...
2
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1answer
214 views

How can I calculate overcurrent from over voltage for the AP9101C IC

I designed a battery charging, protection, and boost circuit for a project I am working on. However, I made a complete noob mistake and forgot to find the overcurrent value for the battery protection ...
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0answers
31 views

Why are the outter tracks of a magnetic disks more stable?

In our digital computers class, the professor mentioned that the outter tracks of a magnetic disk is more reliable because the outter bit are "bigger". Isn't the packing density of a magnetic disk ...
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58 views

How to add external sensor data to pictures, canon DSLR, hot shoe, electronics

Here's a challenge - I am trying to add different sensors data (height,temperature,distance by laser) to pictures i take with a canon DSLR camera. Would it be possible to connect different sensors ...
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1answer
284 views

How to get similart Geomagic two stl file deviation in free Cloudcompare software?

I need to compare two STL (Dental model Scanned) files and find the deviation between their points, SO this two STL files have different boundary, so i already used the GEOMAGIC Control software for ...
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1answer
46 views

Memory management in for multiple cores of a processor

I come across a question-'How big an address space should I allocate for each ARM A53 core in a mobile processor?' What is the answer for this? Does it refer to memory management in SoC?
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1answer
8k views

How to detect what wattage that my Windows laptop is receiving via USB-PD?

I don't know too much about USB-PD. I understood that USB-PD requires negotiation between the charger and the receiver. So probably my Windows laptop (Dell XPS 9570) should be able to know the current ...
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1answer
52 views

How exactly do noise canceling headphones work?

I purchased a pair of noise canceling headphones today and I was just wondering how exactly they are able to cancel out background noise?
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0answers
17 views

motion gesture and axis definition

I read something about defining hand gesture, which include mid-air hand gesture (e.g a peace sign with the two fingers moving one after another), touch-based gesture (e.g. on touch screen), and ...
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1answer
28 views

How can I transmit signals from pre-amplifiers to a laptop nearby using bluetooth?

I am trying to collect signals from preamplifiers (Aquarian Audio preamps, PA-4) and have them sent to a laptop nearby wirelessly, I have not found a dedicated device for this process, and the ...
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1answer
208 views

How to find the smallest change in voltage

You are comparing different A/D converters that will have 3.2 V and -3.2 V as their positive and negative reference voltages, respectively. Out of the following, converter _ can resolve the smallest ...
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1answer
23 views

What is the mechanism of transition in applications of finite state automata?

Just began studying automata. I've already seen several examples of the applications of finite automata: pattern matching, automatic doors, etc. And so far, I understand the logical connection between ...
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0answers
168 views

Multiple sensor data to WiFi visualized on React Native app: Guidance [closed]

Objective: I want to connect multiple sensors to an item of equipment and visualize the data real-time on an iPad. Mock of Desired Output: Question: I need advice on the best methods to use to ...
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0answers
22 views

Confused about information on a state transition table

I'm working with a State Transition table with a variable I can't identify. Here's the table: I'm pretty sure "a" is the present state. "b" is the next state and Sx and Sx+ are the inputs. ...
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1answer
99 views

How to introduce the CONSTITUTIVE equation into structure mechanics [closed]

Suppose I have stress and strain relationship and it can be simplified to the equation $\sigma=Function(\epsilon)$. This is the CONSTITUTIVE equation of the material I want to do research. Assume ...
2
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3answers
147 views

Memory and Transistors

I'm asking this question as an early computer science student who is beginning to get way more interested in really low level stuff/computer/electrical engineering. I am very unfamiliar with hardware, ...
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1answer
149 views

Relation between residual stress and von mises stress calculated by FEA in comercial software

Suppose we do nonlinear structure mechanics computation. In each time step, we can get the results and can get Von Mises Stress at each node of the mesh. Can we say this number also means its ...
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2answers
538 views

How can I vaporize metals?

What are some common ways that I can vaporize Metals into a vacuum chamber? How can I keep these Metals in a gaseous state?
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1answer
163 views

How does punched card computer circuit design work?

I am trying to understand the underlying process of computer circuits from the beginning. I am reading about punch cards. I have come across several youtube videos and articles which are useful. ...
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1answer
98 views

How can I convert (AF36) hexadecimal to 2421 BCD? [closed]

How to represent numbers 10 to 15 in 2421 bcd? The original question is this:
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0answers
94 views

What is the proper way to handle string-to-float decimal truncation in IEEE 754? [closed]

This is not a StackOverflow question because the software engineers do not have appropriate math skills to answer an IEEE 754 question and thus must be answered by an IEEE tutor. I had to implement ...
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1answer
50 views

How did scientists develop the stencils that made even more precise processors than they had previously?

The history of computers seems somewhat pervasive since there are so many steps in modern manufacturing and so many changes in trends with transistors over many years. Grasping how we got to our ...
2
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1answer
48 views

Computer “Ports”, port scans and daemons

If I do a port scan from the internet, do I hit a bundle of wires that are physical ports into the motherboard (like a PCE port)? Or do I actually go into the operating system and interact with the ...
3
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2answers
1k views

Use two passive CPU coolers on one single CPU?

I aim on building a silent, completely passively cooled PC, with no moving parts at all (I am aware that it is cheaper to go for an inaudible computer instead, using low speed fans. This is not the ...
2
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1answer
276 views

MSP430 - Semaphore - C language

I'm dealing a C code here which is run on MSP430 LaunchPad. What I need to do here is modifying the program, so that at the push of the button, the micro cycles through 4 different modes: LED1 ...
2
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1answer
85 views

Why laptop keyboard has so many bus lines?

I changed one laptop keyboard on the new one and while changing it I noticed that it has 30 line bus. But from my VLSI practice, I know that keyboard can use only 1 data line and 1 clock line (PS/2) ...
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1answer
55 views

Similarities between OBD-II and VGA

I'm working on a project to make a Heads Up Display in my car. I need a way to present my project in front of my class, for I obviously cannot bring my car into the presenting room. My professor ...
2
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0answers
85 views

Connect a GPU to a mobile FPGA using

Please indicate if this question would be better asked on other fora, I'm not an engineer but computer scientist, and have very little experience with FPGA's / ASICs. As far as I understand from ...
5
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1answer
1k views

Byte organized and Word organized memory using memory modules

I'm currently learning about how a CPU works on the hardware level and something that keeps coming up is memory organization. From what I've learned (and please, do correct me on anything that is not ...
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2answers
78 views

Computer engineers — do computers use varying amounts of power? [closed]

My friends and I are trying to hypothesize how computers use energy. Please settle the debate. Do computers, or any other electrical device of the sort, e.g. 3d printers, use different levels of power ...
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0answers
32 views

MIPS Assembly stalls and forwarding when a register's value isn't modified in previous step

I'm going over pipelining and stalls and forwards with MIPS architecture, and there's a couple things I'm uncertain about. If two adjacent instructions, such as the first two of each set bellow, both ...
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1answer
31 views

Can you perceive similar kind of “humanizing” of technology in other fields of engineering than computer science?

So I've noticed that computer science has actually been developed so that it has become more human and less technological in the sense that development has raised the abstraction level up to a "more ...
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1answer
50 views

DLX assembly synthax

I see some example of DLX assembly instructions such as: LW Ri, 0 (Rz) but I can't find out why Rz has brackets around it.
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1answer
118 views

I Say To myself:“I Am An Engineer!”…How Do I Arrive At That Point? [closed]

"Ponder the path of your feet, and let all your ways be established." Proverbs 4:26 Over the last two years I have had a strong will to become an inventor within the field of computer-technology/...
2
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1answer
90 views

How do I hook these components together to get my desired functionality?

I have a big button http://store.2xlnetworks.com/thebigbutton/ and a display counter Microframe Model 265 https://www.microframecorp.com/d0265-6-digit-rugged-computer-controlled-display . I want the ...
0
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1answer
27 views

Deep out-of-order buffers

I was reading about the new Intel Xeon Phi processor on Intel's site https://software.intel.com/xeon-phi/x200-processor/remote-access and ones of its features is: Highly-parallel performance: ...