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

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1answer
35 views

How is data transmitted on different media?

Thinking about computers primarily, I'm trying to get my head around how data is transmitted along various transmission media. In particular, I'm getting confused between the use of electromagnetic ...
3
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4answers
742 views

How much binary data is transmitted across a physical wire in one clock cycle?

How much voltage change, what I'm calling binary data, can be transmitted over a wire at one time in one clock cycle? I understand, I think, binary data is what we call it and the wire doesn't really ...
-1
votes
1answer
63 views

Clock and data vs rx and tx communication

I'm working on a project in which I have to make two pic10f200 microcontrollers communicate via serial communication lines. I know that with Arduino you interconnect the two board's rx and tx lines, ...
1
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2answers
94 views

Send analog audio through the rs232 port of a data transmitter

I would like to convert an analog audio signal into an rs232 datafeed to send it through a data transmitter and receive it at the other end. I already have the data transmitter and receiver. Thanks ...
1
vote
1answer
33 views

SharkX6 Flight Controller USB data connection cable

I have a SharkX6 flight controller (FC) that I am using in a quadcopter that I am building. The flight controller came with a broken (the fried IC is to the left of the '100' component) power ...
1
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3answers
60 views

Will Cutting the Data Lines of USB Still let power to go through?

A USB 2.0 Cable should have 4 cables. They are the Vcc, Data+, Data- and Ground. If I only cut the Data Wires and let the Vcc and Ground wires connected. Will it still be able to transfer power or ...
2
votes
2answers
52 views

Will cutting only the Power Lines damage the Data Lines or the Device?

A USB 2.0 Cable should have 4 cables. They are the Vcc, Data+, Data- and Ground. Will only disconnecting the Vcc OR Ground Wires damage the Connected Device or the Data Wires? I currently have a USB ...
0
votes
1answer
58 views

If a USB Cable is being used between two devices, are the power wires needed?

I am trying to figure out a way to give power to an android tablet and a DSLR camera at the same time (for a photo booth). I was able to purchase an AC adaptor "battery" plugin for the camera, but ...
0
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2answers
32 views

PCIe Data clocked refclk question

When only one clock is used in PCIe and let's assume the clock is connected to device A. How does device B transfer data to device A. Device B does not have a clock source.
0
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1answer
33 views

Microcontroller to Beaglebone data handling

I have an STM32F0 microcontroller wich is controlling an RS-485 bus interface. The sensors on this bus are providing 220 bytes of data every millisecond. I want to get the data from the ...
3
votes
1answer
42 views

Finding the maximum storage of a CD from measurements of pits and lands?

Full disclosure: This is schoolwork. I'm not asking for anyone to solve this for me, I am only asking if I'm on the right track with my thinking. I have imagery of a CD from an atomic force ...
1
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0answers
47 views

Does earth-grounding reduce environmental noise in data-acqusition?

There is a USB DAQ device where all the single-ended inputs have common grounds and are floating sources(i.e they have no contact to the earth ground on input side). These inputs can be hooked up to ...
1
vote
1answer
81 views

DRAM - is data pins order important when routing on PCB?

Quick question: I have SDRAM (SDR) and trying to connect it to uC. Can I route data bits from SDRAM to uC in any order? So they aren't connected respectively (d0->d0, d1->d2 ... d15->d15) but in any ...
1
vote
0answers
64 views

How to reduce SPI bit errors between a Bus Pirate and a BIOS chip?

I need to eliminate bit errors when reading a BIOS chip using a Bus Pirate v3.6. The BIOS chip is still soldered onto the motherboard. I'm using a Bus Pirate probe set to connect the Bus Pirate to a ...
2
votes
1answer
53 views

Strange behaviour of real log amp

I'm facing some problems with my log amp circuit. My configuration is this: http://i.stack.imgur.com/nrF12.png and the "gain" function in case of ideal op-amp is: V_out = -V_t log(V_in/R1 I_es) with ...
0
votes
1answer
38 views

Throughput and speed of data transmission cables [duplicate]

What are throughput and speed limiting factors in an ethernet or any other type of cable which is used for data transmission?
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2answers
44 views

Data rate vs. data volume

I'm a little confused by the two terms. What do data rate and data volume mean and what are the differences?
1
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1answer
58 views

Accuracy of a data acquisition hardware

In a data acquisition system absolute accuracy is defined as measure of all error sources as following: Abs. accuracy = error from Gain(Span error) + error from Offset + (error from Noise + ...
0
votes
1answer
51 views

Determine the number of bits before receiver misses a bit

A transmitter sends 100 bits per second but the receiver's clock runs too slowly causing it to measure once every 0.0107 seconds. How many bits are measured in a row before the receiver misses a bit? ...
-1
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2answers
82 views

Best memory type for data logging

I'm gonna design a board which data logging it's mandatory! I don't think that i have sufficient space in pcb for large parts but i want an embedded flash (dedicated IC). For handling unexpected power ...
-1
votes
1answer
31 views

VHDL - Wrong result changing MSB of R2 input

I'm implementing a shifter using a similar strategy of T2 shifter. My implementation is in structural way but I have a problem. My code of Shifter is: ...
1
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1answer
320 views

STM32: Saving 50Mbit/s data in sdram or sd card

Could STM32f429 save image data to sdram or sd card? Camera module outputs its data at a data rate of 50Mbit/s via 8 parallel ports. What I want to do is to save this data into the SDRAM or SD card as ...
1
vote
0answers
72 views

why my DAQ signal is a noisy signal?

background: My goal is to use an Arduino with two proximity probe (sensors) to achieve some output. It is worth mentioning that the output of the proximity probe has two components: DC output that ...
0
votes
0answers
51 views

Unknown voltage oscillations in sensor data acquired by NI 9234 DAq module.

I am using a National Instruments 9234 Data Acquisition module for the measurement of voltage across my pressure sensor which is used to sense the pressure on it by measuring the voltage across it. ...
2
votes
7answers
353 views
+50

How can I collect data from a hydrophone?

I want to collect data from a hydrophone over a period of days or weeks. A desired typical collection period would be 30 days. Hydrophones are a piezo-electric transducer that output millivolts ...
1
vote
3answers
299 views

Breaking a 16-bit long int to write into eeprom?

I am writing data to eeprom AT24C16 using PIC microcontroller pic18f4520. Every address of this eeprom can hold 8-bits while I am using long int's to store data that are 16-bit in size. How to break ...
0
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0answers
157 views

Receiving sensor data with Arduino: push or pull?

Every second I am reading a data string (comma-separated) from a battery management system via RS232. The first step was stripping the field name from the value; at times resulting in skipping a ...
1
vote
2answers
89 views

I want to send and receive data wirelessly from 90 different areas to a central collection site. longest distance is 8.5 miles.

I have 90 pump/lift stations that I would like to send information from to a central collection place (office). The longest distance is 8.5 miles away. most of these pump stations are line of sight ...
10
votes
4answers
1k views

Avoiding confusion between no input and a zero in binary?

Suppose I'm transmitting data through FM where 0 is 2Hz and 1 is 4Hz. The transmitter is transmitting 2Hz when there is no input. If I fed the recieved binary to a UART port of a microcontroller, how ...
2
votes
1answer
117 views

How can I make an accurate torque/RPM curfer for the random electric motors lying around my garage?

I am blessed with a garage filled to the brim with all sorts of electric motors, most of them sourced from broken household appliances and the like. I would like to gather some data about them, like ...
0
votes
1answer
118 views

Alternative to AM and FM transmitting for data transmission?

So, I need to communicate wirelessly between a micro-controller and my computer. I'm building a radio receiver circuit, and a radio transmitter circuit that works on FM transmission. However, I had an ...
0
votes
2answers
378 views

LEDs and External Quantum Efficiency (EQE), how to find Light Output Power with test results? How to find power?

I'll try explain everything as clearly as I can as it's slightly complicated. I really need help as I'm quite new to this kind of experiment and work so any help would be extremely appreciated. I did ...
1
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1answer
150 views

MATLAB function fixdt() question

MATLAB has a function fixdt() that creates objects describing fixed-point or floating-point data type. So if we write ...
1
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3answers
154 views

Convert MP3 recording of data casette to serial data

I have a retro EMCO F1P CNC machine with a matching M1 controller that comes with mini data cassettes containing the "Machine State Data" which must be fed into registers of the controller before ...
0
votes
1answer
56 views

Thermopile Detector Datasheet question

I'm working on making a detector using a Thermopile. Here's a link to the page and datasheet. Link I've looked through and am not sure what the values for Ra, Rb, Rc, and Rd are supposed to be. If ...
0
votes
1answer
66 views

Data acquisition noise or defect?

I'm using the following setup to measure a voltage across a resistor. I measure it both by a DAQ system and an oscilloscope. Below is the illustration for the setup: DAQ is the data acquisition ...
0
votes
3answers
89 views

Code advice with minimum clock cycles

My original question was: I've a 8 bit data with only 3 bit used, for example: 0110 0001 Where 0 indicate unused bit that are always set to 0 and 1 indicate bits that change. I ...
2
votes
1answer
116 views

MOSFET Help Needed

I am working on a home project that uses a micro controller to switch a set of transistors on and off rapidly(msecs). The current through the last transistor is about 300-400 mA to drive a high power ...
0
votes
2answers
352 views

Send data to an Arduino by using an audio cable

I want to send some Data to my Arduino by using the audio jack of my smartphone/computer. (USB is no option, since my smartphone does not support USB Host mode and I also don't want to go wireless or ...
0
votes
2answers
223 views

Can we observe addresses, data and other signals on the microcomputer buses by an oscilloscope, a LED or even an ordinary DC voltmeter?

Microcomputers are dynamic devices that are synchronized by a clock oscillator. So the signals (E, R/W, CS, A15-A0, D7-D0...) appear on their buses only for parts of a microsecond and, as the buses ...
-4
votes
1answer
92 views

What is data rate? [closed]

What is the definition of data rate? What is the unit of it? Is it related to successful bits?
0
votes
1answer
153 views

How can the Nyquist theorem for the maximum bit-rate of a noiseless channel be derived?

I've been given the formula: $$ I = 2* H * log_2(L)$$ where: \$ I \$ = Maximum data rate in bits per second for a noiseless channel \$H\$ = Bandwidth that the channel will carry (that is, the range ...
4
votes
2answers
1k views

How does a ps2 mouse send data to a computer? [closed]

I want to read data from a mouse with the help of Arduino. I want to calculate relative motion between two objects. My questions are 1) Is it possible? 2) How is mouse interfaced with Arduino?
2
votes
1answer
174 views

AVR USART wait for AVR's reponse to continue text stream

AVR USART wait for AVR's reponse to continue protocol I am doing a senior project, and I need to send a large text file line by line to an AVR (atmega32) which will control a piano using ~36 ...
0
votes
1answer
422 views

Can We send data using exisiting power outlets in homes

I am trying to build a project in which I want to transfer data through existing power outlets in a home through power lines while simultaneously using those outlets for power supply also. My question ...
2
votes
2answers
2k views

2.5mm Jack to USB data Cable

I was recently diagnosed with Type 1 diabetes. With the need to test my own blood upwards of 8 times a day I have a ton of data to keep track of. My testing unit has the ability to upload its data to ...
4
votes
2answers
2k views

What data format do audio cassettes use?

How do the sound pressure values correspond to the magnetic domains on the tape? Is the format analog or digital?
0
votes
4answers
223 views

How does a CPU choose a path? [closed]

This is the most baffling question of all other concepts. I ask my teacher "How does the computer choose a path?" "They program it" "How do they program it?" "..." I have a basic understanding ...
-1
votes
2answers
87 views

communication 101 [closed]

I have a couple of really basic questions. (1) When a device(Device 1) communicates to another device(Device 2), do the devices have to operate in the SAME frequency for the data transmission to take ...
0
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2answers
251 views

Best way to wirelessly transmit and receive data

I'm working on a project that requires wireless transmission and reception of data. I wonder what the best technology would be. It is not tons of data maybe not even a kilobyte. And the range should ...