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

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0answers
43 views

Synchronous serial data transmission protocol [on hold]

I have designed a new Synchronous serial data transmission protocol to transmit a set of characters(symbols) each 8 bits (7 bits + 1 parity bit) long using 1 start and 1 stop bit. What are the issues ...
0
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0answers
42 views

AD620 output question

I am building a data acquisition system. I am using AD620 (instrumentation amplifier), have read data sheet thoroughly and I have used the following circuit which I obtained from internet (image ...
0
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1answer
42 views

low pass filter and gain calculation

I am working on a data acquisition system project . I have used SMPS power supply and two pressure sensors(-5V to +5V input) and (0-20mV o/p) my analog circuit consists of one op-amp(OP07) and one ...
-1
votes
1answer
54 views

Is there an IC that works like a queue for binary, serial data (like a shift register)?

Is there an IC that works like a queue for binary, serial data? I have searched a few sites for an IC like this, but I have no idea what the name of this IC would be. Here is a basic description of ...
0
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2answers
207 views

Where is data coming from a bus stored in a microcontroller?

It might sound like a silly question, but somehow I am not able to answer this myself with confidence. Let's say we have a microcontroller (MCU) with a data/address bus and data is moving to and from ...
0
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0answers
50 views

Intel 80188 Bus Conflicts

I'm doing a school project that involves designing and building an MP3 player and I am really struggling to find a bug in hardware. I know it's probably hard to help without seeing the schematic and ...
9
votes
5answers
1k views

Why don't we use 7075 aluminum Ethernet and USB cables?

Since the skin depth of copper at 1Ghz is about 2.3 micrometers, it doesn't seem like aluminum would provide a worse signal to noise ratio. 7075 aluminum is also much more resilient and stronger than ...
0
votes
1answer
27 views

Sensor Performance Analysis

I've recently built a temperature sensor and have been testing it against a reference thermometer in several different scenarios/environments/temperature ranges. My question is, how do I analyse my ...
1
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0answers
30 views

Sources of online broadband RF energy data stream?

I am interested in finding recordings of broadband FM radio emissions, ideally in the marine VHF frequencies (156.0 and 162.025), in order to understand carrier artifacts and distortions that could ...
0
votes
1answer
104 views

Communication over DC Bus at low data rate

I am looking for a solution to modulate a data signal into a DC powerline that has 12-60V. I found for example the DC-Bus solution from Yamar. But they are the only ones offering this and their chips ...
-2
votes
2answers
87 views

Since it is possible to get high quality streaming video via a regular TV antenna, why can't we also get broadband internet that way? [closed]

I just bought an over-the-air antenna for my TV, and I am getting very clear and high quality video for at least 20 channels. It occurred me that if the over-the-air communication mechanism is capable ...
0
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1answer
186 views

USB Charge and data separate cables

Is it possible to split micro USB to USB cable so two cables (data + and data -) go to the PC with USB and two other power cables go to power brick?
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1answer
47 views

How is data transmitted on different media? [closed]

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
votes
4answers
905 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
132 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
vote
2answers
208 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
2answers
86 views

SharkX6 Flight Controller USB data connection cable [closed]

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
vote
3answers
156 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
91 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
83 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
43 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
votes
1answer
51 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
60 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
48 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
99 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 ...
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0answers
109 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
58 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
42 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
68 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?
2
votes
1answer
79 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
53 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? ...
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votes
2answers
144 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 ...
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votes
1answer
40 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
750 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
88 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 ...
4
votes
7answers
454 views

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
453 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 ...
1
vote
2answers
104 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
177 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
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1answer
148 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 ...
1
vote
2answers
824 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
vote
1answer
361 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
vote
3answers
210 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
59 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
94 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
91 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
119 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
458 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
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2answers
245 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 ...