Questions tagged [data]

Data are values of qualitative or quantitative variables, belonging to a set of items

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16 views

Confusion about max data rate of NR supported device

The following is the formula for the max data rate is from 3GPP specification document "User Equipment (UE) radio access capabilities (3GPP TS 38.306 version 15.3.0 Release 15)" I am ...
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1answer
52 views

Average lifespan of typical project box LEDs widely available for puchase

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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2answers
115 views

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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3answers
129 views

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 however trying to send SPI controller signals across long ranges using either 18 AWG cable or based on all the recommendations we have been ...
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1answer
103 views

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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46 views

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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2answers
43 views

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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14answers
9k views

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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6answers
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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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45 views

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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1answer
106 views

Crystal Oscillator

What are the markings mean on this crystal that I found on a motherboard? Thanks.
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0answers
38 views

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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4answers
179 views

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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1answer
73 views

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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1answer
83 views

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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6answers
135 views

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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1answer
56 views

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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0answers
43 views

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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2answers
75 views

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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1answer
94 views

MAX233 problem with receiving data

I need to make serial connection between regular PCs and a 3.3v TTL device, I using the Maxim 233 which has internal capacitors. I have the PCs incoming TD connected to R1_IN and RD T1_OUT. The ground ...
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0answers
33 views

How can I simulate microwave radio link transmission?

My task is to simulate a two-way data transmission microwave link. The fixed parameters are distance, transmitter power, carrier frequencies, bandwidth, receiver noise figure, intermediate frequency, ...
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2answers
104 views

The results of my magnetic flux data from voltage recorded

For my electrical engineering senior design I created an experiment to test magnetic flux (more voltage) through a receiving coil. There is a large sending coil with A.C. voltage and a small receiving ...
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1answer
33 views

MQ-4 sensitivity characteristics - raw data

I need to convert Rs/Ro ratios of my MQ-4 sensor to PPM. For that I found the sensitivity plot in the datasheet (https://www.sparkfun.com/datasheets/Sensors/Biometric/MQ-4.pdf). However that is a pdf ...
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0answers
48 views

Data transmission through multiple IoT devices

We are implementing a device which will have multiple sensors inside multiple houses in our local area. Each house will have 1 device fixed at a place and data will be transmitted to one central ...
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2answers
122 views

Should I double data or power lines for UART device

I just have a quick question. I'm connecting PN532 NFC reader with RPi, for this I am using around 30m of UTP cable from my front door to rack with RPi, preliminary test showed the device is able to ...
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0answers
44 views

Leaky Bucket Example

I have an image below of a leaky bucket image that I am trying to understand for my telecommunications class, and I was hoping for some guidance/verification if my train of thought is on the right ...
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33 views

Connecting a smartphone android camera while charging the phone

I am hoping for advice. I have a android camera (the same as in this video: https://www.youtube.com/watch?v=AvWIp5vtsEU) and want to connect it to a Sony phone to see if I can use it as a streaming ...
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0answers
83 views

FPGA Connections

Im a senior EE major whose going into their senior design project. In the past Ive always struggled with data and computer systems. But as luck would have it that's what my senior design project is. ...
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0answers
60 views

How to calculate how much voice channels is being multiplexed

I would like to know how I could calculate from the bitstream which has a bitrate of 2,048 Mbps into how much voice channels is being used. I know that the syn has 32 bits and sign is 16 bits. Bitrate ...
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0answers
26 views

What are odd-even memory addresses in 8086 and how do they work? [duplicate]

I have recently started to look more into microprocessors at the hardware level, and i am a bit confused on what are the odd-even memory locations that 8086 uses. As far as i understand, it has ...
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1answer
74 views

How do modern CPUs treat memory operations? [closed]

How does a modern CPU treat memory reads and writes on the hardware level? With old 8-bit architectures all memory locations are read and written to one byte at a time, but how do modern CPUs that ...
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1answer
260 views

read negative voltage with mcp3008

how can i read a negative voltage by the mcp3008 ? , i tried to do that with this code but i I could not read it , i see that the most readings are 0.00 , this is my code : ...
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92 views

Should I solder the shielding wire (braiding) on USB cable for better data transfer?

So Ive cut the USB wire of my racing wheel (like xbox controller) and joined them again, to skip the breakaway USB cable part. While splicing, I Ignored the shielding wires, just picked them off and ...
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2answers
91 views

How do I turn off multiple data connections with a single switch? [closed]

I am pretty new to electronics but so I've been doing a lot of reading and whatnot. I have a question I can't seem to find any information on. I am modding a handheld device (the device in question ...
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1answer
65 views

using mcp3008I/P adc with raspberrypi

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1answer
47 views

Outputting correct data on shift register with clocks tied from microcontroller

I want to be able to output correct data from the microcontroller to the 74HC595 shift register without using the clock lines separately. This schematic matches my ideas for 16 bits of data: The ...
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2answers
163 views

Why does a higher bandwidth allow a higher data rate [duplicate]

I have not taken any signals processing classes yet but I am interning at ATnT in the RF department. I do not understand why higher bandwidth increases data rate and the other answers did not make ...
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0answers
148 views

How to use the print step option in LTspice XVII?

I'm aware of the print_step option for transient analysis, but I can't seem to get it to work. I'm using LTspice XVII for windows 10 to simulate a DC DC converter for about 3s (It is necessary to do ...
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1answer
44 views

Can I use WP(Write Protect) pin of a USB flash memory controller to prevent tampering with its firmware/stored data?

I want to have an USB stick that I can make it read-only and insert it in any untrusted PC without risking a silent BadUSB infection. I was thinking about finding an USB stick that has this WP pin in ...
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1answer
76 views

Beginner trying to learn how to read start and end addresses for memory chips in hexadecimal

I'm new to electrical (construction management student) and am trying to learn how to read start and end addresses. The practice problem I have been given is in the picture, and I was wondering how I ...
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1answer
36 views

How are these Data Buffering Methods same or different from each other?

I am trying to understand the operation of a Serial Bus protocol converter chip. It connects with the serial bus on one side and on the other side it provides its data on the MCU host interface. ...
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1answer
53 views

R65C02P4 (6502) microprocessor R/W pin state while suspended

I'm building a circuit with a Rockwell R65C02P4. When the RDY line is pulled low, the manual specifies that the address lines will reflect the current address. It doesn't specify what the R/W state ...
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1answer
126 views

Import Parametric Sweep data from LTSPice into Matlab

In LTSpice, I am running transient simulations with input 2 parameters (Amplitude and Frequency) being swept. The initial graph of all the data looks like this: Obviously it is hard to tell what is ...
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1answer
48 views

Binary Data encoding and decoding format

I am trying to understand what is the meaning of this data coding format as shown in the following image. It is not simple binary to decimal conversion. Can anyone tell how this conversion formula ...
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1answer
36 views

Stream Audio and WebCam Video through Radio Frequency [closed]

I and my friend would love to make a better communication system between us since his internet connection is not the best and neither is mine. We are 20 km away from each other. Our project is to ...
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2answers
625 views

How do i measure Ethernet signals on an oscillocope

I have a device that works on 100 Mbps using a CAT5E cable. Any idea of how can I show the data communication (capturing the signal integrity eye pattern) of this device using an oscilloscope (4 GHz/ ...
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1answer
108 views

Altium Designer Libary Ref Field Missing

I'm trying to create a MySQL database for my Altium company library. I've created a MySQL database with utf16 encoding that contains tables for each category of components. Here is an example table: <...
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2answers
125 views

Two USB ports for one IC

I have to get two USB 2.0 ports connected to a single chip delivering data and power. If only one port is connected, this connection and power should be forwarded to the IC and if both are connected ...
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2answers
90 views

Chosing microcontroller for a sensing project

I am upon chosing a microcontroller for a PCB board project. MCU collects data from capacitance to digital converter (from a capacitance sensor) via I2C and I would like to pass that data to a host PC ...
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1answer
98 views

Read serial data from unknown source using Raspberry pi

I have a fuel dispenser, which has one keypad and two displays, each display has three of 7 segment LCDs. I want to control the fuel dispenser with a PC or a phone. The way to do this in my knowledge ...

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