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Questions tagged [line]

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0
votes
2answers
37 views

I2C Single Master Multiple Slave

I have a one I2C master and 14 I2C slave devices connected on the bus. I want to clarify the order of things that happen on the I2C bus. Let say the master send an ADDRESS, then all the slave ...
2
votes
2answers
54 views

Sizing a motor for a conveyor

There is a plethora of information on motor sizing on the internet discussing the rated voltage, current, torque and power of the motor, and how these parameters should be selected based on the load ...
0
votes
2answers
43 views

Can I connect a 16 ohm output signal to a line input if I use a resistor in series?

newbie here. I have a Hi-Fi system and I wish to connect its output to a line input in another system while still being able to hear through the Hi-Fi´s original speakers. If I use the Headphone ...
2
votes
1answer
51 views

What are the series inductors used for in this filter?

Regarding the below filter, are the series toroid inductors at the very right end of the filter used for CM or differential mode filtering?: I think R and Cx are for differential filtering. And the ...
1
vote
1answer
51 views

How Does Line Frequency Affect Coils of a Contactor?

I am using a generator as my source voltage, which produces 240VAC @ 240Hz. I was planning to use the following contactor from TE: CONTACTOR 4PST 40A 240V In the datasheet it says this contactor's ...
2
votes
0answers
161 views

Parallel transmission lines impedance

I just want to know the correct way to calculate \$Z_{in}\$ in this network. It's very simple but I think I might be doing something wrong. Is it ok to calculate the impedance over one line and get \$...
0
votes
0answers
24 views

Are differential line drivers “active” circuits?

Some quadrature encoder datasheets describe their outputs as either Differential Line Driver or Line Driver. On closer inspection of the diagrams, they appear to be the same thing (differential line ...
-2
votes
1answer
219 views

Line follower robot with obstacle detection [closed]

I want to build a line follower machine for a competition and as I know the track will include an obstacle like a brick on the line that the machine will have to avoid coming back on the line.I will ...
-1
votes
3answers
92 views

How i can use the same audio jack for input line and headphone output

I have an audio circuit that can record and play audio (saw schematic). I have a DAC and a class D amplifier for playing audio through headphone but i wanted to try to use the same audio jack for ...
1
vote
3answers
554 views

Using differential line drivers for digital signals

I need to send a slow (steady state most of the time) TTL signals over 10m - 1km (max) distance. Shielded CAT6 wire will be used and I can't use radio based solutions. Wire is only used for that ...
3
votes
1answer
324 views

How to connect a diy audio signal to my “expensive” audio interface

I'm a hobbyist and after some experimentation (around 4 years) I want to connect my signals I create on the breadboard to my expensive audio interface. Until now I was using the "mic" input on my ...
1
vote
2answers
102 views

Correct definition of transition in line coding

Hello I have following question and it says: I basically cannot understand this solution. My questions: isn't it a sequence of 4 0s followed by 4 1s? (answer says 4 1s followed by 4 0s) since ...
0
votes
2answers
332 views

3 Phase line to line voltage application

I've been tasked with designing a three phase system to be sent over to the US and have encountered a few questions along the way. My system will be hooked up to a 208Vac three phase socket and most ...
0
votes
1answer
468 views

Why am I measuring earth to line voltage as zero? Is that what it supposed to be?

I have a confusion about the topology below: I was wondering the potential difference between the line and earth. So I decided to check this through a 3-prong plug. I thought I would read the same ...
0
votes
2answers
57 views

Low-cost way of shining a wide line of light, kind of like some bar code scanners do [closed]

What is a cost-effective way (say roughly $15) to shine a wide but thin beam of light, directly away from the source, so that it would project a line onto a nearby surface? My particular beam would ...
1
vote
2answers
531 views

How to prevent eagle from attempting a specific route?

I'm using the eagle autorouter to route my PCB because it makes cleaner tracks than if I did it myself. One problem I have is that sometimes it insists on attempting to make the same connection over ...
0
votes
1answer
56 views

3 Phase Power Question Wording

I am running in to a problem when working on 3 phase problems. I don't really know how to determine if the voltage given in the question statement is the line or phase voltage. The magnitude of the ...
0
votes
1answer
138 views

Get line to line values from line to neutral reading

My device can provide reading of Line to neutral values through Modbus , I'm requested to provide Line to Line readings which is not available in our Modbus table for the device. Is it possible to get ...
0
votes
4answers
1k views

What is a return line in AC power transmission? Why is it needed?

This diagram shows V vs. t for three-phase power transmission: What is the corresponding I vs. t diagram? Would that diagram help explain what a "return line" is and why it is necessary? (cf. the ...
30
votes
3answers
8k views

Why 3 phase and not 1 phase power transmission?

Why does power transmission use three lines with three different phases? Why not three lines all in the same phase? Does it have to do with the alternators used for generating the power, or is there ...
1
vote
1answer
259 views

Effect of metal resistivity on the characteristic impedance of microstrip line

We know that the characteristic impedance of a microstrip line is given as follows: In general the metal resistivity is so small that Z0 can be taken as sqrt(L/C). But if the metal resisitivity is ...
1
vote
3answers
768 views

Square wave at line frequency. How does it work?

I found the following circuit next to a switching power supply in an electrophysiology amplifier (AXOPATCH 200A, an instrument for a technique called "patch clamp"). References to power outlet: L: ...
0
votes
1answer
47 views

Mimic Power Line

For a class I am making a system to remotely turn on and off a light as well as adjust the brightness through a dimmer(this one: http://www.homedepot.com/p/Leviton-Trimatron-600-Watt-3-Way-...
1
vote
4answers
403 views

Transmission Line Question

I have a question concerning reflections due to impedance mismatching. Now, assuming a lossless TL, the latter is modelled by sections of lumped L-C segments where L in a series (sub)element of the ...
-5
votes
1answer
585 views

Why did the world stop using Dc for transmission? [duplicate]

Why did the world stop using it for transmission ? And is there any countries still use it ?
3
votes
1answer
127 views

Is it safe to use an Y2 Capacitor where an X capacitor used to be?

Is it safe to use an Y2 Capacitor where an X capacitor used to be? I mean Y should be safer right? So Y2 where X should be is OK, but not the other way around, right?
0
votes
2answers
259 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 ...
2
votes
1answer
338 views

How to implement line code?

I am looking for an easy way to implement a line code (both the encode and decode parts). This could be something like Biphase Mark Code, Differential Manchester, or anything else that has the ...
0
votes
1answer
353 views

Build a thin line follower?

I'm building a line follower robot with just 3 sensors to follow a black line of 1cm. However the distance between my each of my sensors is also 1cm. Straight path following is not a problem. However ...
0
votes
1answer
91 views

Is it possible to run 240V 30 amp service over doubled 12wg Romex line wires? [closed]

I have some existing Romex 12/2 installed on my machine. If I doubled the conductors used for each of the two line wires needed, would that adequately carry 30amps at 240 volts? This will be in open ...
2
votes
1answer
344 views

Line to phase voltage with harmonics

First of all, I'm new to this forum and I'd like to introduce myself: my name is Julio and I'm an industrial engineering from Spain. At this moment, I'm doing some research about power calculation (P,...
5
votes
3answers
2k views

Software based Caller ID project- Problem with getting caller ID signal

Nowadays, I am trying to make a Caller ID project without using Caller ID ICs. Firstly, I have done a lot of research in Google to get information of phone lines and their electrical properties. I ...
0
votes
1answer
435 views

Building an waveshaper device for my analog synth

I have a nice analog synthesizer that can do fancy sounds but has limited options in shaping the tone. It has two oscillators but they don't output sine waves (low pass filtering is not an option in ...
0
votes
1answer
81 views

How to wire this component (-4dB audio)

Getting frustrated because I don't understand what this -4dB thing is in the circuit and I can't figure out how to wire it correctly or even if I have the right part. I have a 3.5mm mono audio jack ...
0
votes
2answers
1k views

How does water damages the phone lines?

Today, we just replaced the phone line which was damaged due to moisture and were causing a great deal of disturbance and noise in the phone. What exactly causes this noise? Does the signals gets ...
0
votes
1answer
1k views

How to simulate an AC line filter in LT Spice

I'm fairly new to LT spice and am trying to simulate an AC line filter, but it keeps giving me the error K1: coupling to shorted out (ignored) inductor L1. What am I doing wrong? Here's the circuit:
5
votes
4answers
1k views

What limits the speed at which information is sent/received over a fibre optic line?

I was trying to find an answer everywhere, but all I can find is absorbtion and scattering, which doesn't limit the speed itself, just the quality of the signal.
0
votes
1answer
2k views

Should I connect “line” to “line” and “neutral” to “neutral” on my power supply [closed]

I have an industrial power supplyy that I use in a device I am making. I am attaching a picture of it. It has "line", "neutral" and "ground" input connections. Ground is ok. But I don't know if I ...
3
votes
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 ...
3
votes
2answers
4k views

Speaker level to line level

I want to reduce my apmlifier output to line-level. I found this tutorial which is compatible with 50Watts output power. There is also mentioned what to do if amplifier is more powerful than that. So ...
1
vote
1answer
201 views

Using a Line Decoder (Multiplexer) to set multiple outputs high

When using a 3-to-8 Line Decoder / Multiplexer such as the 74HC238, can I set multiple outputs (1-8) as high at the same time? As opposed to only one output high at any given time, and the rest are ...
4
votes
2answers
10k views

How to reduce an audio signal to proper input level?

I'm working with an audio ADC that supports a max audio input of 500mVRMS before it will start clipping. This is sufficient for lots of equipment that does a 1VPP/.35mVRMS line level, but I'm finding ...
2
votes
1answer
488 views

How to clean up high audio noise amplified through a 2x2 electronic switch?

I have two computers connected through this device: http://www.audioholics.com/news/press-releases/impact-acoustics-audio-crossplay to two sets of commercial audio speakers, designed for connection ...
8
votes
1answer
2k views

Designing a cable for bidirectional communication between 2 iphones via TRRS (headphone jack)

I'm trying to design a cable that allows bidirectional communication between 2 iPhones, connecting into their TRRS jacks. I've made the cable but it is temperamental at best -- can anyone help me ...
0
votes
1answer
1k views

effect of wheel diameter on line following robot [closed]

i am making a line following robot. i have the option of selecting 11cm and 4cm wheels with 1000RPM and 3000RPM respectively. I want to know the advantages and disadvantages of the options. Please ...
1
vote
2answers
320 views

Video entry sender has only one signal line for Microphone + Speaker

I am planning on connecting an off-the-shelf door camera (audio/video sender) to my project. I've posted an extract from their manual here The video output is composite which I can support, but ...