Exchange of information between devices. Communication can be wired or wireless.

learn more… | top users | synonyms (1)

0
votes
0answers
13 views

Using an AV out to USB connector with USB sharing station and central router to live stream video? [on hold]

Goal: Hi! I am trying to get a live video feed from my camcorder (Canon Vixia HF G30) on my computer which is positioned ~1 km away from the camcorder in order to film races remotely from a central ...
-1
votes
1answer
43 views

Which is the most suited technology to communicate wirelessly between industrial machines? [on hold]

I'm in an industrial environment and I have to let multiple industrial machines to talk to each other. What is the best technology/protocol that could fit in such environment? I'm talking about ...
-3
votes
0answers
37 views

Visible Light Communication. Unable to Receive Square Wave Signal at the Receiver [on hold]

I am having trouble receiving the sent 1 MHz square pulse sent by the LED to the photo diode. Could you please let me know what needs to be changed in order to receive a similar signal.
0
votes
0answers
44 views

Sending data from an arduino after disconnecting the serial port

If I disconnect my arduino uno from my computer to measure an accelerometers data, how can I send the data from the arduino to my computer? Can I do it by reconnecting the serial port or can I only do ...
0
votes
1answer
26 views

Project Loon 20KM LTE transmission from Regular Handset

i read this question before asking. how does a cell phone transmitter work? i am very confused about Google Project Loon. I understand the balloons will be transmitting LTE from 20KM up in the ...
0
votes
1answer
15 views

Can FTDI Basic Breakout and FTDI XBee Explorer USB be used alternatively?

I wonder if these two boards from sparkfun can be used alternatively for USB to Serial communication? The first: (FTDI Basic Breakout) https://www.sparkfun.com/products/9716 The second: (FTDI XBee ...
0
votes
2answers
37 views

Best Hardware for Accurate Point Tracking System

Here is what I am trying to accomplish: In the middle of a room, I have a mechanism with a laser diode mounted on it that can be moved in all axis by a motorized pan/tilt head type device. This ...
-1
votes
0answers
87 views

How to design a comm link between Earth and Pluto? [on hold]

Such a comm link is needed for the New Horizons spacecraft going past Pluto. The space craft is 3 billion miles away. What would it take to make this work? Even better if you worked on the design, and ...
0
votes
1answer
16 views

Calculating the Power of the Upper Sideband

I solved a question in a book that goes like this: If the carrier power is 1000 watts, what is the power in the USB at 70.7% modulation? I solved it using the formula: $$ P_{USB}=\frac{m^{2} ...
0
votes
1answer
30 views

During boot-up, address of UART(0x8a000) is being used. With MMU turned off during that time how is this address being used.?

How is any peripheral address we use in our programming being used by kernel in actuality? Kernel with its MMU component, how does it work on the peripheral address.
6
votes
2answers
293 views

Wireless communication under water

I am looking for a under water wireless communication, distance up to 3000 meters. For this I quickly did some research on it and found out that Acoustic communication would be the best solution since ...
2
votes
2answers
73 views

RX/TX labeling standard

I'm familiar with the idea that RX means receive, and TX means transmit. Therefore, if I'm wiring two IC's together, feeding the TX of the sending chip into the RX of the receiving chip makes sense. ...
3
votes
2answers
115 views

How Channelization code is shared in HSDPA?

I am on my way to understand the HSDPA/HSUPA technologies. I have just started and came upon the topic of channelization code. I learned how these codes are generated - Hadamard code technique - and ...
0
votes
2answers
51 views

How to use a MUX DEMUX to communicate two circuits?

I'm trying to reduce two circuits with 14 connections to only 3. I was googling for hours and I read a lot about multiplexor and demultiplexor. But as is my first investigation in electronics (I'm a ...
0
votes
0answers
40 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 ...
0
votes
1answer
37 views

ANT-MMCX and Microstripe line and UHF RFID module circuit designing

Below, you see the only schematic of a 6 pages-datasheet of an UHF RFID module (working frequency = 840...930 MHz): There are three questions: What is that ANT-MMCX? I search it in Google and I ...
1
vote
3answers
98 views

12V signal convert to 5V without interfere

I have Wiegand 26bit bus. DATA0 - GND = ~12.5V when idle DATA1 - GND = ~12.5V when idle I need some sort of scheme or something to convert 12V signal to 5V without interfere. I have few ...
-2
votes
2answers
58 views
0
votes
1answer
129 views

MISO/MOSI vs DI/DO

Is there a difference between the MISO/MOSI pins and the DI/DO pins? Is it true that MISO/MOSI is for SPI communication where DI/DO is for USI communication? What is the difference exactly?
1
vote
2answers
74 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 ...
0
votes
1answer
61 views

Detection of the 3G network

Is it possible to detect a 3G mobile network without having the orthogonal code or the spreading code used in 3G? By detect I mean pick up the radiated radio frequency from the mobile phone then see ...
1
vote
1answer
42 views

what is the function of pre-emphasizer and dee-emphasizer in Stereophonic FM Receiver?

what is the purpose of theses two block ? I know that pre-emphasizer will boost the high frequencies before transmission and dee-emphasizer will reducing them by a corresponding amount in the ...
1
vote
1answer
60 views

Reliable way to transport data over 1-2 km distance

I am looking for some way to transport data (around 3000Kbps) omnidirectional. Transmitter should not weight more than 300 grams but receiver can be much heavier. The range I am trying to achieve is ...
0
votes
2answers
49 views

How PCIe can tranmit data at 2.5 GTps?

Serial transceiver for PCIe is using Reference clock of 100MHz. Then how data transfer at the rate of 2.5 GTs is possible?
2
votes
1answer
61 views

Working of ring modulator

I am having trouble understanding how this ring modulator works i.e. how it multiplies the input & carrier to give us appropriate output? Any help or guide will bedeeply appreciated. Reference - ...
2
votes
1answer
67 views

Why does using Discrete Cosine Transform lead to data compression?

DCT is used in JPEG standard along with Huffman encoding to further compress the result. I understand that most of the data in spatial domain which is an image is "present in low frequencies". This is ...
0
votes
1answer
69 views

Sync pulse from PC

Can anyone suggest a way that I can send or detect short pulses between a microcontroller and an old laptop with limited I/O functionality. I need to do this every 5-10 sec. The laptop doesn't have ...
0
votes
0answers
21 views

duobinary coding : how to find if there an Error in a given sequence?

why we can't have even number of zero between opposite polarity ? is the same things applies for even number of ones between opposite polarity
1
vote
5answers
337 views

Low cost simple communication between two microcontrollers

What tradeoffs and connection options are there in low cost bidirectional communication between just two microcontrollers? In this case: Master/Slave relationship, bidirectional data flow Distance ...
0
votes
0answers
30 views

Data Transmission Including Lasers + Shift Registers

In a project we're doing we need to be able to transmit data through lasers. Data is just 4 bit binary numbers. So what we intend to do is have 4 Parallel in - Serial Out Shift Registers connected to ...
0
votes
2answers
71 views

AtTiny45 read lag?

I have set up 2 AtTiny45 setup like this (The left one is also connected to power): from which one (the left one) is generating a signal which is (when measured) looking like this: The second one ...
0
votes
3answers
227 views

How to send string in serial communication in AVR-C

So as the title states, instead of sending a byte of information at a time, I would like to be able to send a whole string. What I tried to do was that I tried to put the user input in an array and ...
0
votes
0answers
44 views

USB signal analysis

I have a device that I want to control it has window software that runs it, and a complex interface. I just need a pair of commands, also I know very little about usb device hacking, and signal ...
2
votes
1answer
110 views

Can two PCIe endpoints communicate with each other through PCIe switch?

Figure shows basic architecture of PCIe. From what I understood, Root complex block will convert data into PCIe format. That means PCIe endpoint to endpoint communication will happens through Root ...
0
votes
1answer
98 views

One wire (+GND) serial communication. How to have a correct coupling?

I'm a firmware developer more than a hardware designer. I've a doubt about an idea of mine. I want to obtain serial communication between eight ATtiny85 (slaves) and an ATmega168 (master - It might ...
0
votes
2answers
125 views

RS-485 Modbus device to MCU

I have a device (an energy meter) that sends data via RS-485 (Modbus protocol). And I want to collect it with MCU. The important thing is that I'm trying to design a board and I want it to be ...
2
votes
2answers
123 views

Serial data received in wrong bits

I have an RS422 interface set up between an Arduino and a custom-built device. The device is set to transmit a 16-bit header, followed by 66 bytes of data, at a baudrate of 460,800 and at 200Hz. This ...
0
votes
1answer
73 views

Atmega328P FTDI 5V USB Serial Communication

I am working a Atmega328P and FTDI 5V USB Cable to get a Serial Communication between the Micro-controller and the PC. I am using Tera Term for receiving out from Micro-controller. I am using an ...
0
votes
2answers
65 views

Bidirectional connection between a device and a webserver

I'm a software developer, I'm in no way familiar with electronic devices but I'm working with people who are familiar with them. Our problem is: We need to design a small device able to communicate ...
1
vote
1answer
81 views

Make two Arduinos communicate with electrical signals

So I need to make two Arduinos communicate. Though, I can't use any clock related system (so no Serial, no I2C...) and so my idea was basically to wire one from another so they could read electrical ...
0
votes
1answer
56 views

why it is hard to generate an impulse train ?

I have understood the concept of Ideal impulse sampling ,but i have struck upon the fact that practically generation of impulse train is not possible.
1
vote
0answers
26 views

communication between ATmega88 and LPC2138

I am trying to communicate between ATmega88 controller and LPC2138 by sending some text on UART lines from ATmega to LPC. UART lines are connected through 100 ohm resistor on hardware.  Currently I ...
-1
votes
1answer
65 views

Which is the better way to send a broadcast signal to a great number of smarthphones in the same place? [closed]

I wonder which could be the better way to send a broadcast signal to a great number of smartphones in the same place at the same time? I'm thinking about 10.000 to 50.000 smartphones in an area of ...
0
votes
1answer
71 views

High frequency SPI-like communication: is there any hardware allowing software tweaking?

I will need to communicate with a device using serial protocol mostly similar to SPI but with several changes: Data packet can has any bit length (e.g. 35 bits) Stop sequence formed by lack of ...
0
votes
1answer
54 views

Question on Superherodyne Fm receiver to find the range of local oscillator and the image station …?

Consider a superheterodyne receiver designed to receive the frequency band of 1 to 30 MHz with IF frequency 8 MHz. a) What is the range of frequencies generated by the local oscillator for this ...
-1
votes
2answers
103 views

how to communicate between 3 devices

i want to communicate between uno, mega and netduino, which protocol should i use i want the uno and mega to send information to the netduino which mean that i don't need duplex connection which mean ...
0
votes
1answer
37 views

Serial port communication [closed]

I have transmitted the data from a PC to other devices using a serial port cable. In that case I was using windows 7 32 bit os. But when I tried it with 64 bit os I am not able to transmit it. Is ...
1
vote
1answer
41 views

Limiting wired low frequency signal transmission

I'm now considering TDA5051A to transmit information over the 230VAC power network. To avaid any interference between neightbours I will need to stop transmision beyond the appartment electrical ...
0
votes
3answers
54 views

Spreading of a pulse in time domain

I have a small doubt. Suppose I transmit just 2 square pulse with frequency of 100 MHz over a wireless channel, will it spread in the time domain when received by a wireless receiver. In other words, ...
0
votes
0answers
31 views

How do I use the XStream RF module for serial data communication with a BeagleBone Black?

I am currently part of a car team and we needed a minimum 2.5 mile range wireless system which would communicate the sensor values(Battery voltage, current etc.) to the ground station via a radio. ...