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Questions tagged [data]

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

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1answer
36 views

What happen to a dff(flip flop) without input?

I have this question but I don't know what happen to a dff without an input is it always 0 ?? like this picture below the 2nd dff hasn't any d ??? Also, if someone can draw the answer of the question ?...
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0answers
13 views

Determing proper wireless parameters for HMTRP radio module

I'm trying to properly setup an HM-TRP FSK radio module to send and receive data the best it can at 56kbps. I think I'm wrong with setting it up to use 600Khz "receive bandwidth" and 160Khz "modulate ...
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0answers
20 views

Bidirectional data bus divided into nibbles not returning correct data - 8051

Since I have 10 I/O lines connected between two microcontrollers (AT89C4051 + AT89S52), I am trying to get away with elegant data transfer. Instead of spending months redoing an entire circuit board, ...
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1answer
43 views

Do some microcontrollers require data to be loaded in temporary memory before programming?

When I programmed the AT89Cx051 series of microcontrollers, I didn't have to use special memory to program the data, but now even though I'm following the instructions in the datasheet (found from ...
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2answers
119 views

Package detection in datastream on FPGA

Hardware: I have an asic-"sensor" which sends me 32-bit packages (serial). I need to detect this packages with an FPGA. When I start the readout, the sensor is sending me data-packages until I stop ...
0
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1answer
38 views

Using multiple ports to transfer data to single device

I have the datasheet of a camera which has various interfaces (computer buses) via which it can transfer data to other devices: I2C bus, CAN bus, RS-422 serial port. I know the camera can use ...
0
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1answer
31 views

Implementing a simple logic equation

I need to do a lab that seemed like it was simple, but for some reason i cant get the right output for this function. its G(0)= T1T3'+T5T7'. These are data inputs.. I can only use NAND and NOR gates. ...
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1answer
65 views

What are the advantages of a wider bus in comparison to those of a higher clock frequency? [closed]

The aim is to increase data transfer rate. I understand each may have some drawbacks and advantages. Frankly I'm not knowledgeable enough to know of many so I'd like some input from others. I know ...
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0answers
30 views

Sending data from Simulink Matlab to development board F28379D

I'm fairly new to Simulink programming so bear with me. My project is to measure some parameters with the ADC of the board and send them over serial (SCI_A) to a Simulink file I'm running on my PC ...
0
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2answers
88 views

Is it better on two closely connected microcontrollers to send nibbles with an ack or a byte with a delay for an ack?

I'm trying to figure out the best approach to transfer high-speed data one way between two microcontrollers (with their own crystals of the same speed) of the same variety (between AT89C4051 and ...
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2answers
103 views

How do electrons travel in data transmission wires?

I've searched and googled quite a bit on this subject, but haven't found any concrete answers. I understand that pulses are generated at the transmitter's end to get to the receiver's end. More in ...
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4answers
156 views

Fiber-optic transceiver ICs for applications other than fiber-optic Ethernet? [closed]

When we talk about fiber-optic transmission, we almost always talk about copper to fiber-optic Ethernet conversion using fiber-optic transceivers. But since fiber-optic communication is just ...
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2answers
409 views

How to extract data from an NAND chip with an NAND reader from iphone 6? [closed]

I am not an electrical engineer and I cannot take phones apart. I had an iphone 6 that suffered no water damage, no smashed screens, no dust... but suddenly it got an NAND memory issue. The phone ...
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2answers
88 views

Data over DC Power, mono-directional, simplest circuit

(To preface, I will probably just run 4 wires, with RS485 on 2 and power on the others, but this came to my head, and I started thinking about it.) I was thinking of a simple way to send simple low ...
0
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1answer
54 views

Can 74HCT buffers work just as well as 74HC buffers between parallel port and target?

I'm making a circuit to program the AT89S52 microcontroller in a serial fashion as follows: Call me paranoid but this time I'm using resistors on all outputs to the micro as well as RC networks on ...
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2answers
38 views

Schmitt trigger inverters or regular inverters for clean high speed data processing

I made a circuit in which data is passed in from phototransistors (part# PT334-6C) into a microcontroller (part# AT89C4051) serial port via schmitt trigger inverters (part# 74HC14) and a demultiplexer ...
11
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8answers
5k views

Saving data without a microcontroller?

Is there a way to save voltage data directly (without a microcontroller) to anywhere, like EEPROM, SDCARD, etc.? For example, I am using an MPX pressure sensor which gives 0V to 5V analog output. ...
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4answers
142 views

Does computer memory record the zero binary state?

It's been two years since I started reading about electronics and computer circuits. I fell in love with the homemade computers and the possibility of building one by myself. You will see: When ...
0
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1answer
52 views

Obtaining data from parallel port without the “phantom power” problem

After making failed circuits in the past, I learned that the cause is that the parallel port was producing "phantom power" (aka powering the circuit). This is because I plugged my circuit into the ...
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0answers
55 views

Send data from MCU to Embedded Linux CoM

I'm using an ATSAME70Q21 MCU to record 32 channels of analogue data (via SPI ADCs) and 32 channels of digital data (via GPIO). My embedded device has an iMX6-based CoM (Toradex Apalis), which runs ...
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1answer
89 views

understanding of UART , if two devices share a common ground. How do they get to the same voltage level for a save data transmission?

My question is related to the common ground in a UART communication. So far, what I understand how communication in general works is: Distinguishing the voltage between two cables (one is a GND and ...
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1answer
32 views

Can a bilateral switch block transmitter interference and can my board still produce great audio?

I made a circuit in which an ISD1760 chip outputs music via an LM386 IC and I like the quality and volume of sound, however, when I run an HM-TRP transmitter on the same circuit board and the ...
0
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1answer
102 views

Transmitting through IRDA as if its a native serial port. Possible?

I'm currently making a lazertag project that utilizes the standard UART data format for data I/O. Before I go make up another circuit board that connects a photo-transistor that senses a laser beam ...
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2answers
161 views

Does 8b/10b decoding take running disparity into account?

What's unclear to me in reading literature about 8b/10b encoding is how it is decoded. How an 8b word is translated to a 10b symbol clearly relies on the running disparity. But when it comes to ...
0
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1answer
56 views

Using my sensor values, what are relevant data analysis techniques?

I am currently trying to devise a system using gyroscope+accelerometers placed in on a hat/cap in certain areas of the head (Front-left, Front-right, Centre, Back-left, Back-right). I want to create a ...
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0answers
28 views

Calculating cell resistance in dependence from cell temperature from CAN bus logs

I'm part of a formula student team. When we go testing we are logging the CAN bus data the car produces to further understand what the car is doing. We log all the battery cell temperatures/voltages ...
-1
votes
1answer
165 views

I need help to identify a technology i only can define as “magnetic data pins” [closed]

I was interested in the "wireless" pins technology used on this here: Would be much appreciated if you could guide me towards some modules/components or the name of such tech. Or something similar ...
0
votes
1answer
57 views

Recieve serial data on multiple pins ATTINY85

I am working on a project in which multiple ATTINY's need to send numerical data between each other. In most cases the ATTINY wil have to receive multiple streams of data on different pins. See the ...
0
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0answers
176 views

3 external ADCs connected to STM32F7

Currently I am doing a project to develop a system with three external ADCs. I want to read the 3 ADCs at the same time. I bought the following components 3x ADS1256 / http://www.ti.com/lit/ds/...
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0answers
37 views

Faster 8051 not taking the slower 8051 pin status correctly

I'm trying to do a rather simple data transaction between two 8051 microcontrollers using a variant of the SPI protocol. The large one is a slave and the small one is a master. The documentation for ...
1
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2answers
72 views

What serial communication interface would work best for data logging when the nearest sensor and main MCU are (at least) 1 meter apart?

I would like to setup a "sensor array" which has 4 sensors attached to it. Each sensor is expected to send data at rates of up to 8 Hz. The data would be shipped off to an MCU that is around 1-2 ...
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2answers
131 views

NAND flash retention using USB charger?

NAND-based digital flash data storage devices such as SD,SSD,USBstick,eMMC,UFS,etc. do have transistors, where the small amount of electrical charge does slowly leak over time, resulting into data ...
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2answers
85 views

What is Clock Data?

I am learning i2c communication and I got stuck in understanding: clock data, I understand what data is, but what means: clock? ...
0
votes
1answer
54 views

Can this circuit validate AT89Cx051 micro if best valued components are used?

This is a circuit I made in an attempt to validate that the 20-pin microcontroller is an AT89Cx051. and the correct LED will turn on based on how much ram the chip has. While the first step is ...
1
vote
1answer
840 views

in SPI, can MOSI and MISO be connected together?

I'm using an 8051 series microcontroller, and documentation states that if I use serial mode 0, then its RXD pin can function as a bi-directional pin (both input and output) while TXD is strictly a ...
2
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2answers
159 views

How did the Motorola 68000 handle instructions on 32-bit data?

The Motorola 68k, despite its 16-bit external bus, had 32-bit data and address registers, with support for .L-width instructions over four bytes -- which is 32 bits ...
2
votes
1answer
2k views

Calculating series resistors for i2c/spi lines to reduce EMI and ringing

How do you determine if a series resistor is needed for i/o lines, and what value is needed? Where should the series resistor be placed? My assumption is the resistor should be placed as close to ...
1
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1answer
42 views

Looking for time-series grid data set

The electric power grid consists of many buses, with generators and loads connected to each bus. The so-called operating point of the system consists of the voltage magnitudes, Vn, and voltage phase ...
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2answers
243 views

Threshold voltage data analysis

I want to determine the threshold voltage of a diode from the graph of iv characteristic diode. From the point of view of the data analysis I do not know how to do to find a specific value. I have ...
1
vote
1answer
261 views

Serial port adapter reads 5V data but not 3V data

Each time I wanted to hook up a micro-controller UART to my computer via serial port, I make an adapter with the following schematic: For the capacitor, I use 47nF and for the diode, I use 1N4001. ...
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votes
1answer
53 views

How to send data from simple digital device to an Android application wirelessly?

I am trying to find a way to send measurements from a digital device (as the blood pressure device) to a mobile application that can analyse these data ..... How to send these measurements wireless ...
2
votes
1answer
108 views

USB 3.0 power and usb 2.0 data

I am planning on providing a system with the option of powering via USB. Now the system will require greater than 100mA, so USB 3.0 interface will need to be used for powering the system. The data ...
-1
votes
1answer
62 views

Why sometimes I have voice but no data on a GSM network? [closed]

From what I understand, both voice and data are using the same antenna (At least 3G). Sometimes in a remote area, I have plenty of signal but no data service. Is it possible some cell towers don't ...
0
votes
1answer
110 views

What is the minimum freqeuncy required to transmit 2400 bits per second? [closed]

Yes we can use diiferent symbols and modulation sechemes for example QAM ,DPSK,QPSK etc... you can use any modulation secheme. What will be or can be the minimum frequency to transmit information ...
0
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0answers
182 views

Sending Data with HC05 Bluetooth module

I have set of data that i want to send them via h-05 Bluetooth module.But data has variable baud rate and i don't know the baud rates.How can i do it?Is there any Bluetooth module that don't care to ...
0
votes
1answer
100 views

Using lower frequency signals to transfer data

I am working on a system that should transfer some integer data on a distance of couple of kilometers in a mountainous area and should be as cheap as possible. I've read about LoRa modules and the ...
0
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2answers
198 views

Hack fibre optic transceiver for wireless data link

I'm brainstorming ways to implement a high speed wireless laser data link without the exorbitant cost. Would it be possible to take a standard SFP transceiver module and use that across free space ...
1
vote
1answer
43 views

Implementing Best Linear Unbiased Estimator (BLUE) with real data

I have a set of data contained in an excel file that I wish to compute the Best Linear Unbiased Estimator. I understand the assumption of the signal observed must be x[n]=S[n]A+W[n], where S[n] is the ...
2
votes
1answer
1k views

Benefits of RAM vs FIFO in FPGA

If I want to process data in the order it arrives, it seems that a FIFO would be most appropriate; however, I want to look over the data multiple times (at least 20 times), so I am considering either ...
1
vote
2answers
170 views

Current measurement in 12V LED circuit

simulate this circuit – Schematic created using CircuitLab Just purchased an Omega data logger, i'm very concerned with the readings I am getting out of it. As a start I just want to make sure ...