Questions tagged [transmission]

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1answer
374 views

Activate relays by different voltages

I want to make an auto transmission circuit using a magnetic pickup sensor with output 0-3.5 AC Volts. My device has 3 gears (1, 2, 3) and the one that's activated depends on sensors output. For ...
0
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1answer
10k views

D flip flop using transmission gates

In this circuit when D=0 and Clk=0 the value passes from w-x-y-z and z= 1. So at z= not D So this path constitutes what is called setup time of the flip flop. But at the same time the value at D can ...
9
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3answers
9k views

Why does more bandwidth mean higher bit rate in digital transmission?

I understand that similar questions like this one have been asked before on this site, listed below. However, I am confused about the answers. If I explain what I think I understand, can somebody ...
0
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1answer
400 views

Power transmission/AC or DC/Cable cross section/Converters

I have unusual project. I want to optimize mass. Here are strict questions (topics) I would like to get answers to. Any help would be appreciated (direct answer or link). I would like to deliver ...
3
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1answer
1k views

How can I replace this inductor with a transmission line?

I'm new in transmission line theory, hope you can help me. I have this circuit: And I have the admittance; Yin=(1-j) x10^-3 [S] and its frequency f=100 [MHz]. What I need its first to find the ...
0
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1answer
1k views

How best to detect missing/lost packets in XBee S2 communications

My main aim now is to determine if there will be any packet loss in transmission between two Xbee s2 modules, when the distance between them are varied, and in different environments. Please how best ...
1
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1answer
291 views

Wirelessly power multiple LEDs with antenna?

I'm working on a project that requires me to build an antenna and I'm not very experienced with wireless transmission. Here is an overview of my project: Four parking spots for cars with pressure ...
4
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2answers
11k views

How are multiple signals propagated in a coaxial cable?

I am reading that coaxial cables can carry hundreds of MHz signals at How Stuff Works. How are these signals propagated and how are they deconstructed once they reach their destination? One idea that ...
0
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2answers
897 views

How to show field strength varies as 1/r

This is a question, from a radio amateur, that should have a straightforward answer: but I cannot find one on the Web. Is there a robust but simple explanation, not needing advanced maths, as to why ...
1
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1answer
543 views

USART transmission errors with CP210x

I am sending ADC results from an ATmega16 controller to a PC through CP2102. Baudrate: 0.5Mb/s, 8 data-bits, 1 stop bit, no parity. I've written a software to visualize received data. Here is an ...
1
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2answers
1k views

RS485 signal transmission

I'm trying to build large LED panels (3x128 LED modules) using WS2801 LEDs, with data coming from a Teensy 3.0 microcontroller. I'm having difficulties transmitting my Data and Clock signals between ...
5
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2answers
2k views

How do I program 2 CAN nodes to transmit continuously in succession?

Suppose I have three CAN nodes: A, B and C. We know that when two nodes transmit at the same time, the node that has the least SID will prevail over the bus and the other node will have to give the ...
15
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3answers
871 views

Are different houses out of phase?

It's hard to see but on the overhead power lines, houses seem to only be grabbing one phase of the 3-wire transmission line. If each house is using a separate phase, what makes the 3-phase system an ...
0
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1answer
179 views

any way to boost data transmission in GPIB?

I have a pretty old device connected to computer with GPIB (IEEE 488 standard), the bandwidth is limited so it is pretty slow to transmission 1MB data. I wonder if it is possible to boost the ...
0
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1answer
84 views

Calculate transmitting power of the Transmitter

I cannot get a hold of my professor and I'm stuck tyring to understand how to solve this problem. It's not homework or an assignment I'm preparing my self for a test. So as the title states I need ...
6
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1answer
10k views

wireless transmission underwater

I am looking into constructing a closed and small device with arduino sensors that goes underwater. It has to be submerged into water and back several times, and that is made by someone with a rope ...
2
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2answers
2k views

Jerk in Power plants due to breakdown of transmission line

I read in news paper "heavy jerk in power plant due to breakdown in transmission line" what does it mean why does it happen?
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2answers
839 views

How does using Flip Flops between transmission links increase the maximum clock speed?

I am learning about things such as propagation delay and Transmission delays. About how they limit the maximum Clock speed in a given system (where all the chips use the same clock line). I can't ...
11
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2answers
23k views

How does a signal travel down a telephone wire?

Supposing a computer gets data over telephone wire, it has to send/recieve signals, but how do things work? Does it use analog signal or a digital bits? How does it send/recieve "1"s and "0"s?
0
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1answer
4k views

Can the Signal from a Coaxial Cable be Transmitted via Bluetooth?

If so, can the coaxial signal be maintained without degradation (think inserting a transmitter in the middle of a coaxial connection to relay that signal wirelessly without actually interrupting the ...
4
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3answers
2k views

Coaxial cable theory

Well I was learning transmission but I got a bit confused when I came to coaxial cables transmission at radio frequency. What I am lost is how the waves are propagating in the cable, I was thinking ...
-2
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1answer
165 views

Too cold for transmission? [closed]

I've got a weather station which only intermittently sends data. The technical support claims it's because the receiver must be in a room above 15C. It has got batteries, but even if I connect it to ...
2
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4answers
1k views

Single motor driving multiple targets - possible?

I'm a veteran programmer new to the electro/mechanical world and unfamiliar with the terminology and what's already available. I have a single motor that I would like to use to drive a carousel or an ...
5
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1answer
651 views

Underground cables and resonances in range of frequencies

Is that true that underground cables with no power factor correction have resonances in range of frequencies which leads to multiple zero crossing distorted waveform? But why? Is that is because it ...
7
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3answers
2k views

Why does the ionosphere reflect HF but allow VHF signals to penetrate through?

Wikipedia says: ... Unlike high frequencies (HF), the ionosphere does not usually reflect VHF waves (called skywave propagation) so transmissions are restricted to the local radio horizon less ...
3
votes
1answer
2k views

SMPS design, requirement of generating High Frequency

Question: Is that requirement of converting 50Hz to a higher frequency in SMPS (Switched Mode Power Supply) is just to reduce the transformer/inductor core size? Background: Since as we all know ...

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