Questions tagged [data]
Data are values of qualitative or quantitative variables, belonging to a set of items
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What do the letters mean on this LiPo (or Li Ion) battery?
I’m trying to find a replacement battery for my Bluetooth earphone as they drain out very fast. It is a 3.7 V 55 mAh.
Looking through the options I see batteries with better capacity but the letters ...
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PS/2 Mouse Movement Frame - How do I detect, or correct errors on reception from device?
This question is from a project of mine I have been working on for about 3 months now, and I reached a point where I was going to go the route of using an interrupt based handler for my packet ...
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I want to get the data from my fraba encoder directly to my pc without using PLC
The Fraba Encoder which I have is OCD-EEA1B-1213-C10S-PRM Ethernet/IP encoder in which we to get the data from the encoder to show to the PC where we will not use PLC and the communication will be TCP/...
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broken micro sd recovery with one piece lost?
I'm aware of the practical limitations, but say a micro sd card has broken in half (straight through the NAND) and one of these pieces has been lost, can data still be technically retrieved from the ...
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How to measure time between incoming packages on an FPGA?
For measuring the speed of incoming data packages on an FPGA, would you use a clock that is connected to a counter and each time a package is detected, it would store the time?
And if there would be a ...
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How to connect LEDs to D+ and D- of USB 3.0 cable [closed]
I need to connect LEDs to USB 3.0 cable that connect to PC and to embedded device.
I want visual control to see data transfer by this USB cable and want to connect LEDs for this purpose, like Ethernet ...
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Is it possible to combat SR Latch oscillation or there are better alternatives?
I need to store a bit value and then ignore any attempts to store/change it again until it's reset by another signal. So I figured the SR Latch is suited for the task. However in my project there is a ...
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Transmitting binary data from scratch via radio (wireless)
What is the basic concept of transmit binary data wirelessly or from radio?
Here are so far my knowledge about it.
Any digital data (image, sound, video) is represented by binary digit (bit).
Binary ...
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1
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Verilog signed numbers representation
I am confused as to when the '-' sign is used and when 's' is used. This post is somewhat helping, although not entirely.
Please correct if I am wrong:
For example, to interpret 8'sd244, we write 244 ...
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How do drives deal with user overwriting data?
Let's say I create a text file and write "Hello world!" to it. I stick with the default 4096 byte allocation size (assuming NTFS file system). I wonder what happens when I change (overwrite) ...
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Can polarity protection circuit be useful for also data transmission?
For example, CANBUS has two transmission lines CAN_HIGH and CAN_LOW. Polarity matters. Would the performance be affected if a polarity protection circuit with couple of diodes would be implemented?
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Photodiode speed limitation
I have a system which demands optical data transmission since rotating parts are present. A mixed mechanical-electrical engineering project has led us to use photodiodes to receive data from one ...
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Combine uncertainty of multiple measurement instruments
I'm currently working on a project where I'm trying to figure out if there exists a significant difference between measurement instruments for RF power measurements. I will measure multiple Bluetooth ...
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Do there exist Touchstone/S2P/SnP files for capacitors and inductors in the public domain?
I'm writing a Touchstone Perl module for reading and transforming Touchstone files to different parameter (S, Y, Z, etc) and format (DB, MA, RI) types. (Touchstone is also known as .s2p files or s-...
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Call variables in Keysight Genesys software for designing RF system
I am using Genesys 2012 software by Keysight in order to simulate electronic RF system. I can see that after the simulation it generate variables. For a certain simulation it generate "...
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What is the maximum data rate of AS-Interface?
After online search, I could not find exact information except some marketing words. It is said that it supports up to 100m and can be extended up to 600m but there is no information of maximum data ...
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Is it possible to use I2C fast mode+ with 30m cable?
I2C can reach up 1Mbps with fast mode+ and 3.4Mbps with High Speed mode. I just want to ask if it is possible to use 3.4Mbps mode with longer cable and what is the max. possible cable length.
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Is there a database containing typical transistor data and characteristics? [closed]
I guess the title says all, but basically I'm looking for a searchable database on typical transistors' data. Such data would ideally be arranged like:
...
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Hamming code question
Suppose we have m data bits and n parity bits. In order for the Hamming code to function: $$m+n<2^n-1$$
If we have 3 parity bits we can have up to 4 data bits. But lets say we don't have 4 data ...
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Instrumentation Tools for Collecting Data in DRAM accesses
We can use instrumentation tools, such as Pin tool, to collect memory accesses of an application running on a system. The type (read or write) and memory address can be collected. How about data? Can ...
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Send float with Serial Port
I'm trying to send float temperature data from stm32f103c8t6 to qt application. When I try tosee value with Keil I can. But When I try to transmit to App I got some error about convering uint8_t to ...
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Transcieving 125khz rf signal
Does anybody know if it is possible to connect a coaxial cable to the tx rx pins on a wireless module ? I am trying to send data via coaxial RG58 cable. Or would a twisted pair be more suitable? I ...
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Sliding window protocol
In the sliding window protocol when the receiver sends RRn to the sender the receiver's window is shifted to the right now starting at the n position correct?
Suppose this is the window of the ...
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Timing Arduino response with ADXL345 accelerometer's data rate
I'm currently working on a system that calculates the velocity by integrating the values of the acceleration.
I'm using the ADXL345 accelerometer with a ESP32, and so far, everything's going good, i'm ...
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How to get RMS voltage and frequency from datapoints read from an ADC?
I have an ADC that samples 4000 times per second or 0.25 ms interval per sample. I would like to extract the RMS and frequency value of the signal being read. How do oscilloscopes and multimeters do ...
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How to reconstruct phase data from magnitude only data in a frequency domain function?
I'm trying to do a reverse-engineering a software called LEAP from the now disappeared LinearX company. This software can perform an operation called "Minimum Phase Transform". This takes ...
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UTD 2052 oscilloscope: read data from .sav file
I just recently got an oscilloscope and was happy to try it out. Now I have a problem with reading the data. The model I am using is the UTD2052 50 Mhz scope.
I can save the data to a USB drive in the ...
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Best way to store very small amount of data?
I'm building a side project at the moment and I want to be able to store and retrieve a very small amount of data (10 kB tops). If the power is disconnected I want to be able to retain the data. I ...
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Bandwidth of signal
What exactly do we mean the signal bandwidth is the range of frequencies the signal is made of?Is this referring to the Fourier transform of the signal in the frequency domain?
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How decode serial data stream
I am trying to decode a data stream. This signal comes out of an STC 8H1K16 micro-controller. It is from the pin labeled TxD is the picture.
When I trigger the signal I am trying to understand I get ...
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Adding two termination resistors on the same node?
Can someone please explain to me why this is the wrong way to set up a CAN bus?
When I measure the resistance between CANH and CANL I get 60Ω, so why must I put the termination resistor on node 2 when ...
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How much data could be stored on a standard compact cassette using modern encoding?
My father and I recently dug out his old Commodore 64 from his basement and tried to revive it. Among other accessories, we also found his old Datasette drive, which is essentially a normal tape drive ...
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Average lifespan of typical project box LEDs widely available for purchase [closed]
I tried searching for this but I just get light fixture LED information. I'm trying to determine the expected lifespan of a typical small LED like you'll find in electronics kits or hobbyist stores. I ...
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Embedded C++ save and restore data
I am working on an embedded C++ project. I am dealing with complex and dynamic objects with lots of objects pointing to one another. I need to store and recall these objects to non-volatile memory. In ...
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Configuring SPI circuit design for use in 485 transceiver for long range data transmission (50 meters plus)
So quickly getting out of things I have previously done in trying to send SPI controller signals across long ranges using either 18 AWG cable or based on all the recommendations we have been reading, ...
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What is the best LED driver to use for this setup - Help with WS2815 data amp over long lines
Currently have 5 m WS2815 strips installed running from 18 AWG wiring connected to 12 VDC Meanwell power supplies and our controllers (SP108,SP102,SP608), power injection on all lines. When we tested ...
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Amplifying long run wiring to addressable WS2815 LED 12V to pool line noise issues [duplicate]
I amurrently working on running WS2825 IP68 lighting (finishing up) in our pool along with LED lights. After moving the controllers to a centralized location, we have been having issues (lights ...
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Missing and insufficient data read from embedded BMP180 pressure sensor in motion [closed]
We're building an avionic system which will fly onboard on our rocket. And we have embedded BMP180 Pressure Sensor on our avionic system and we want to get smooth data when it is moving. Our BMP180 ...
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What makes the stack concept useful in embedded programming?
Below is an illustration of the stack concept:
I have read many times about the stack pointer and how some variables are stored in SRAM on a stack.
Many tutorials explain how it works, but not why ...
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Could data transmission power consumption be lessened by transmitting more zeroes?
According to the IEA 250 TWh of power was consumed in 2019 due to data transmission globally, about 1% of worldwide electrical power use.
I would like to pose a very simple question regarding power ...
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Random Voltage Spikes Reading From ADS1115
so I have a pcb circuit that uses a Raspberry Pi, ADS1115, BME280, and a TGS6810 sensor to detect natural gases. The circuit seems to work perfectly and I am able to see clear curves when I plot the ...
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Crystal Oscillator
What are the markings mean on this crystal that I found on a motherboard? Thanks.
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How do I ignore the content in a txt file while plotting on Matlab?
lovely friends!
The file in my impedance measurement data is in.txt format, with a title and numerous comments written on it. When I try to plot the data in Matlab, I get an error, which I assume is ...
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How to collect data from LTspice
I am trying to collect data from a circuit and use that data for a regression analysis to get results. For my analysis purpose, one input needs to have different output (as the circuit I am using is ...
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How is data transferred through wires? is it [5,0] volts (DC) or is it [1,-1] volts (AC)?
So basically I am learning about how data is transferred through wires for a networking course and I stumbled upon this Ben Eaters video on this topic and I got a bit confused because I know that ...
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Difference between Li2YCY and LiYCY
I would like to ask about the difference between Li2YCY and LiYCY TP cables.
As far as I know, the main difference is that the Li2YCY has core insulation based on PE and wrapped screening made from ...
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Is binary data in actuality a range of high and low to mean each in Computer Science [closed]
I do understand why 1 and 0 are used and why we have to make two states for data transfer storage and the rest. And why those two symbols and not off and on or some other means. It was most efficient ...
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How information is collected from a photographic sensor
For example, you have a sensor measuring temperature, light intensity or anything else.
You have microcontroller reading your data and a sd card to save your data.
I can understand how you can ...
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Algebraic Data Type
I understand the concept of algebraic data types, but I don't see in what context they are useful or when they would be beneficial. When should I consider using them and how are they useful in ...
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Why do we use a low resistors on Data lines for an ADC for example or a clock?
Why do we use a low resistors on Data lines for an ADC for example or a clock ?
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