Questions about cable types, properties, ratings and construction.

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0
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1answer
17 views

Connecting GPIO and SPI signals via cable

There is a requirement in one of our systems to transfer signals from one board to another board in the same system. The signals are GPIOs and SPI lines from I.MX6 processor and it is in 3.3V ...
0
votes
1answer
26 views

Headers and Cable for a LCD and UI?

My current layout consists of two 16 pin (8x2) 2.54mm pitch (shrouded) headers. One is for an 16x2 LCD screen and the other will be for a button interface as well as status LEDs which will be mounted ...
0
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2answers
65 views

What's the definition of “signal to ground capacitance” of a coaxial cable? What's the difference between it and normal capacitance?

What is the definition of "signal to ground capacitance" of a coaxial cable. I know what capacitance is, but I'm not sure whether it is just the same thing.
3
votes
1answer
70 views

Continuous current capacity of this conductor?

How much current can a copper conductor that is 2 meters long, 0.003m thick, and 0.00045m wide continuously carry? Also, the resistance is about 0.02 Ohms.
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0answers
57 views

Carrier Wave in Wired Data Networks

I know this must be trivial for many... Which are the main reasons why line data is not modulated/demodulated in normal enterprise wired networks (in the sense that discrete voltage levels are used)? ...
2
votes
2answers
69 views

Connectors and receptacles for easily plugging and unplugging cables

What are good solutions for pluggable, "free-hanging" cable connections? As simple as this question might sound, I am currently struggling in finding components that allow me to easily connect and ...
1
vote
0answers
65 views

How to get Ethernet cable into a small enclosure

I have a project with a Raspberry Pi in a small enclosure that is in a weather-protected outdoor location. I currently have power and gpio signal cables entering the enclosure through grommeted ...
9
votes
10answers
2k views

Avoiding DC voltage drop over long distances

I am trying to power my IP camera over a long distance from the power socket (about 10m). The included power adapter, rated for 5V 2A is about 1.5m long. I cut the cable and extended it using a ...
0
votes
0answers
14 views

Wiring GU10 Sockets: Cables are of same color - which one should be “live”? [migrated]

Question: How can I know which cable should be "live" and which one should be "neutral", or does it not matter? (GU10 socket).
3
votes
2answers
289 views

Cat5 wire connector does not appear to be continuous

I'm trying to use a cat5 network cable and connection jack (what I'm calling the female version of cat5) as a way to quickly connect/disconnect 8 wires for an electrical project. I bought a few cat5 ...
2
votes
1answer
65 views

Passing USB signal over short SATA cable and connector

I am working on a prototype device and I will have a daughter-board mounted at an odd angle in a custom enclosure. I need to get a USB signal, and a few extra GPIO type wires, over to the board. I ...
0
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0answers
40 views

Recommendations for DIY cable assemblies

I have recently been assembling stereo TRS cables with custom sleeves and was wondering about recommendations for constructing one's own cables (vs buying or just using wire). Specific things I ...
0
votes
2answers
69 views

Name of 4-conductor twinned headphone wire

I would like to get more serious about repairing headphones, as well as making my own extension cords ( as the ones you can buy tend to be pretty low quality, and I am tired of breaking). The kind of ...
3
votes
2answers
90 views

Headphone cable as antenna

How can headphone cables act as Antennas for built-in radios in smartphones ? Is it possible because of different frequency channels or what is the theory/mathematics behind this? On a side note, ...
4
votes
2answers
183 views

Serial cable won't physically connect?

I have an Altera DE2-115 with an RS232 port. I also have a USB-to-RS232 cable with the connector like this. One is male and the other is female, so they should fit just fine. However, I cannot get ...
0
votes
3answers
129 views

Maximum current for a single-core cable?

I want to connect the cables of a LiPo 7.4 V 2200 mAh battery, to a breadboard. However, the only way to make this happens is to solder the ends of the battery cables with a single-core cable with ...
0
votes
1answer
277 views

220V AC power cable max current

I installed 1mm2 copper AC power cable across house for video surveillance (8 cameras, Power Consumption for each camera is Max 4W, 12V). For each camera has its own 220V->12V converter rated 3A. ...
0
votes
1answer
160 views

Length restrictions on USB 3 cables with USB 2 powered devices

I have this very specific situation where I want to get an understanding of the cable lengths in a USB cable setup. I have 3 USB 2.0 devices that require bus power. So I've connected these 3 with a ...
0
votes
2answers
163 views

Why is propagation delay of ethernet cables unaffected by cable length?

I did some searching on how propagation delay in ethernet cables is affected by the cable length. The answer seems to be that the delay is negligible until the cable length reaches a kind of threshold ...
1
vote
1answer
74 views

Combine protocols on a U/FTP Cat 6a cable (USB 2.0/I2C)

Main question Can I use a Cat 6a cable for USB communication? On the cable it says 650 MHz, is this sufficient for USB 2.0? The length of the cable would be about 6 meters (about 19 ft). If so, would ...
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vote
2answers
122 views

Does the position of the Ferrite bead matter?

Often I will see a ferrite bead a couple of inches from one end of a cable. Does the position of a ferrite bead really matter?
2
votes
2answers
234 views

High voltage cable cross section

What kind of power and voltage can the cable in the photo possibly drive and why is it composed of a lot of small cables? What if the diameter of the single copper cables were a little bigger? How ...
0
votes
0answers
24 views

Malleability of high temperature superconductive wires

I don't know if this is the right place to ask this but it seems the most appropriate: Are superconductive wires made from high temperature superconductors (BSCCO) malleable? I know they're made ...
2
votes
2answers
74 views

Serial comms over 3m cable, shared with USB

I am designing a system that needs to do serial comms over a standard USB cable, as well as normal USB (but not at the same time). In other words, when plugged in to a PC it will appear as a USB ...
2
votes
1answer
278 views

Problem interfacing Platform Cable USB DLC9G

I just started working with FPGAs/CPLDs. Coding and simulation went well and now I wish to program a device. So, I bought the DLC9G programmer plugged it into the USB port. I di not install any ...
0
votes
1answer
166 views

Does the “drain” wire in a microphone audio cable serve any purpose the shield does not?

I'm helping a friend with an audio installation, and he asked about the requirements for the microphone cable: "Wiring Requirements: 2 Conductor shielded cable, 22 gauge with a 24 gauge drain ...
6
votes
7answers
1k views

Sending I2C reliabily over Cat5 cables

I am considering implmenting an home automation system around my Raspberry Pi but I found the price and space requirement of inserting a Pi every place some control is required too much but the Cat5e ...
36
votes
7answers
7k views

Why aren't headphone jack shaped plugs used for data?

With Apple's lightning cable, and USB 3.0, reversible cables are taking off, and I personally think this is very convenient. But we have had better than reversible for a long time, in the form of the ...
3
votes
0answers
75 views

Modifying headset's microphone to hear from it? [closed]

Problem? I have a headset with a microphone, like this: Good for you. What do you want? I want to use my headset's microphone as a real microphone. It's already a real microphone, you noob. ...
1
vote
2answers
242 views

Why do laptops' chargers have coaxial cords?

The cord connecting my laptop to the charger is a coaxial cord. It seems to me that other laptops also have the same type of cord. I get that coaxial cords are good for connecting my TV to an ...
1
vote
1answer
116 views

Breadboard Wiring with Seven Segment Display

So I'm planning on building a skee ball machine and as I've been looking into it I've decided to use some seven segment displays from here: As I've looked into this more I know I need a breadboard ...
0
votes
1answer
94 views

How long does it take to receive data from a cable, turn it into bits, then send it back out again? [closed]

I need to read in data off of a fiber optic (or copper, though I figured fiber optic would be faster) cable, convert it to bits, do something with it that should only take a clock cycle or two, then ...
1
vote
1answer
63 views

Can I make a 6-wire cable with 36V, 5A, and USB? [closed]

I'm trying to build a cable for some arcade light guns. The gun has a USB cable, and another 36V, 5A (peak) cable. Can I find a 6-wire cable that can contain both the 4-wires for the USB and the ...
0
votes
1answer
68 views

Modify a kinect - Reconnect the two cards

I’m trying to make a Kinect camera smaller. There was a problem at some point and my client expect me to put the kinect in a vertical position rather than horizontal as it is supposed to be. The ...
-1
votes
1answer
50 views

RCA and S-video Splitter [closed]

I would like to split yellow RCA cable (because I need 2 input cables for 2 tvs/monitors). And do the same for S-video cable. Can I use cheap simple "splitting" cables with one input and two outputs ...
1
vote
0answers
97 views

Shielded cable vs. unshielded in underwater environment

I know basic electromagnetic theory very well and understand why this works but I'm not sure about one thing regarding usage of coaxial (shielded) cable vs. unshielded (normal conductor) cable when ...
0
votes
2answers
95 views

Not recognizing the port [closed]

So I have a gizDuino ATMEGA 644(an arduino clone), yesterday it is working very well and even uploaded some codes into it. But today my computer suddenly don't recognize the port where my ...
5
votes
2answers
127 views

Industry standard measure for coaxial cable stiffness?

Is there an industry standard measure for coaxial cable stiffness? By stiffness I mean the spring force experienced when bending or deforming the cable. In my search for a highly flexible lab test ...
0
votes
1answer
72 views

STM8L discovery board, wires for the breadboard

I don't know if it is the right place to ask, but still I have a STM8L discovery dev board - http://www.st.com/web/catalog/tools/FM116/SC959/SS1673/PF250636 which has very small square male-type ...
0
votes
2answers
86 views

Identification of Power Cable Type [closed]

I've searched and can't seem to figure out what power cord I need to get for this device. On the back it says: Power: Input --> 100-240V, 50/60Hz Output --> 12V-2A 5V-3.5A Thanks in advance.
1
vote
1answer
213 views

What might cause coaxial cable noise?

In my A level physics I recently did an experiment to find what the optimum frequency to send a digital signal through a RG58/U Coaxial Cable is. My results are available on Dropbox. What I found was ...
1
vote
2answers
106 views

Crimp connectors making process review

I'm actually working on a project with several "little" modules. They are all connected to the PSU and the MCU. So I've design interface for each, so I can easily wire everything together. For that ...
0
votes
1answer
144 views

Star quad cable: Why does the white wire have noticeably less resistance?

I ordered the star quad Canare microphone cable, but I do have a question: why is the resistance of the white wire noticeably less than the resistance of the blue and shield? (The blue and shield are ...
3
votes
2answers
302 views

Why DisplayPort cables must isolate the power pin?

I've been investigating why my 2560×1440 DisplayPort monitor and my mini-DisplayPort MacBook Air don't play along, and, it turns out, this is likely due to a wire in the cable that connects the two ...
1
vote
2answers
99 views

Wire-tie cables

Is there a name / specific type for flat-jacketed wires which come tied on consumer product cables (eg. earphone cables, power cables) ? I always collect them from the new products I buy, but I wish ...
2
votes
4answers
248 views

Programming and controlling microcontrollers and FPGA using Laptop (USB port)

Formerly laptops had serial and parallel port and it was really easy to connect laptop to micro-controllers and FPGAs. But USB has its own protocol and its not as easy as parallel port to implement ...
9
votes
4answers
458 views

How is xΩ impedance cable defined?

This is probably a really simple question, but I can't seem to find a definite answer anywhere. I'm guessing 50Ω cable means 50Ω per unit length. What unit length is this? If this is not how its ...
2
votes
2answers
285 views

Arduino Uno and Sonar Sensor - how long can the wire be before performance suffers?

I am setting up an Arduino Uno with a sonar sensor from Maxbotix (http://www.maxbotix.com/Ultrasonic_Sensors/MB7360.htm). The sensor will be powered directly from the Arduino (5V). The sensor needs ...
1
vote
1answer
176 views

Is an RJ45 / 8P8C connector a good way of connecting an Arduino to a simple device / circuit?

I'm creating a two-part, bass guitar-style MIDI controller, where the left hand plays a small fretboard which detects which frets are being played, and the right hand "plucks" strings (actually senses ...
1
vote
2answers
174 views

How do coaxial cables carry information that a TV can intercept and display?

Is there a specification for this? Like, say, at the backside of a cable box there exists a singular coaxial cable that is meant to be plugged directly in the back of the TV. The TV must be set to a ...