Questions tagged [data]
Data are values of qualitative or quantitative variables, belonging to a set of items
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Feeding data stream to FPGA using PCIe [closed]
I am trying to use PCIe with ultrascale+ device and feed the fpga with data stream and send it to another device using PCIe over SFP+ optical cable. However, I don't know how to feed data to the fpga (...
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2
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How to send large quantities of data via HID
I'm making a 100% customisable mouse, that can be programmed from an app.
You program it in a node based language similar to the Unreal Engine 5 interface
Your code is encoded to binary, and sent to ...
0
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2
answers
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Connecting Two 24VDC Power Supplies
I have a system that has multiple different gas detection sensors and we are datalogging our readings onto a PLC. To power our sensors we are using a 10 A power supply and have everything grounded ...
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1
answer
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Oscilloscope slow sampling with GPIB
I have a 12 GHz oscilloscope with a 40 GSa/s sampling rate from Keysight, and I have a National Instruments GPIB-USB-HS with it. Sampling for 30 seconds with no averaging of data, it only gives 20 ...
0
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2
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High speed data transfer from STM32 to the PC
What is the best way to transfer high-speed data (12.288 Mbit/s) from the STM32H723 microcontroller to a PC? I'm controlling a four-channel audio codec (AK4619vn) and need to sample the FFT of the ...
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1
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I need to capture and store short bursts of synchronous binary bit-stream, arriving at 1.5meg bits/sec [closed]
The binary bit stream arrives on one pin on a circuit board and a synchronous clock arrives on another pin. I don't need to store the clock - it's just there in case I need to use it during the ...
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Data collection board
Im currently working with the DC718C data collection board, and I'm using PScope to collect the data and MATLAB for further processing.
I want to know if it's possible to collect more than 131072 ...
18
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8
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Data transmission protocol with two lines and no explicit clock
Are there communication protocols that transmit bits using two lines A and B as follows:
When line A is toggled, a 0 is sent.
When line B is toggled, a 1 is sent.
I currently use this to push out ...
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1
answer
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Interrupted SSI clock sequence
I measured the following clock and data sequence (time axis is in microseconds) between a Beckhoff KL5001 encoder module and a 19-bit SSI encoder. Apparently the clock is interrupted 3 times before ...
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Losing external EEPROM data after power Cycles on ESP32
Sending "1" starts the write operation into the eeprom every 1 second to the next available address, and sending "2" starts reading the written values into the eeprom. When there's ...
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1
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Can S-ATA cables wear out?
I have a hardware S-ATA disk imaging device here. You connect a SOURCE disk and a DESTINATION disk and the device makes an image of the source disk onto the destination disk.
After using for a couple ...
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2
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Ladder Logic - Recognizing Pattern Failures
(First Post Here)
Something I want to look into adding to a production process is being able to recognize the same failure (that's in a pattern) and having the machine give an alarm once it sees the ...
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2
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1
answer
809
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I2C data held low and clock held high
We are having issues with the I2C communication on our I2C bus and it seems like one of the INA233s on the bus is causing the issue. We are using the INA233s as current and power monitors. We use ...
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3
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555
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With modern connectors, is the metal shell used as a conductor?
Does the metal shell of a connector, such as USB and HDMI, serve a conducting purpose? The metal shell of my TV's HDMI terminal is corroded. Should I make effort to have it contacting and conducting ...
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1
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Gyroscope dps conversion
I am doing a data collection using an Axivity AX6 IMU equipped with an accelerometer and gyroscope (BMI160). I am using the OMGUI software to start the collection where I can choose between different ...
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2
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How should I test my USB cables?
Some time ago, I purchased the FNB58 USB multimeter from FNIRSI with the intention of testing some of my USB cables. Ideally, I wanted to throw away those that are redundant and/or those that pose a ...
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3
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Power Cycling USB
BACKGROUND
I am connecting a USB device to a PCB with a microcontroller. The USB must be power cycled (plugged out and in) in order for the USB to be recognised by the software. The USB connector will ...
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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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1
answer
171
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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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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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1
answer
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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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2
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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 ...
2
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1
answer
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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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2
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508
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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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3
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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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8
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3
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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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4
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1
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394
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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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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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2
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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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1
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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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1
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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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1
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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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1
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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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1
answer
168
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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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3
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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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676
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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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2
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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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2
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627
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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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3
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571
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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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