Questions about cable types, properties, ratings and construction.

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2
votes
2answers
80 views

2.5mm Jack to USB data Cable

I was recently diagnosed with Type 1 diabetes. With the need to test my own blood upwards of 8 times a day I have a ton of data to keep track of. My testing unit has the ability to upload its data to ...
0
votes
0answers
14 views

What is the difference between USB Mini A and Mini B? [migrated]

I have a bunch of USB A to Mini B cables and a single USB A to Mini A cable. I have lost track of where they come from. The two types both look exactly the same with the USB A side having a white ...
0
votes
1answer
62 views

Sending Signals over a Coaxial Cable [closed]

Recently I've been trying to understand how multiple signals can travel along a coax cable. Indeed, I have already read "How are multiple signals propagated in a coaxial cable?", but it doesn't seem ...
0
votes
3answers
78 views

Sniffing twisted pair without interupt

Is it possible, with an oscilloscope, scalpel and a lot of patient, to open up a network cable (twisted pair), and sniff the traffic? All without interrupting the network traffic. So; Use the ...
0
votes
2answers
57 views

FTDI cables confusion

I went to the store and asked for a FTDI cable however, I need a bit of assistance, apparently I didn't properly do my homework before shopping and I ended up with upper pic. I need an FTDI cable to ...
0
votes
0answers
40 views

Cable re-threading, ending, connection help

Been a while, trying to find out what are the pin connectors in a standard car PJB plug. I am trying to clean up the wires so they can plug back into the plug, I'm not sure what the plug for the end ...
0
votes
3answers
57 views

How does “bidirectional” transmission on gigabit ethernet work?

I was reading about the various twisted pair protocols, being distracted by the marvels of Wikipedia when I went to look up the way to wire a connector. And I'm wondering how it can transmit in both ...
0
votes
2answers
72 views

Need help to determine the type of part [closed]

I'm trying to repair an old Atari power adapter. The cable has snapped flush to the connector. I'd like to identify the type of connector to redo the cable. It's bigger than audio 3.5mm but smaller ...
1
vote
1answer
49 views

Cable for transmitting 4MHz 3V3 signal

I am building a device on breadboard where there are 2 ICs: a microcontroller and some auxillary IC, they should communicate via SPI with a 4 MHz clock. Because I don't have enough place on my ...
0
votes
1answer
35 views

How to connect dual 5-pin GS232 to a single 8-pin G-5500 Rotator

I have a Yaesu GS232 computer interface which has two 5-pin slots, one for elevation and one for azimuth. This is supposed to be connected to a Yaesu G5500 Rotator which has a 8 pin DIN slot. Supplied ...
0
votes
1answer
27 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
38 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
votes
2answers
74 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
77 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.
0
votes
0answers
62 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
76 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
72 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 ...
3
votes
2answers
295 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
79 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
votes
0answers
44 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
1answer
80 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
93 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
162 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
413 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
256 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
202 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
79 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 ...
1
vote
2answers
138 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
294 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 ...
3
votes
2answers
84 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
351 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
203 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
2k 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
83 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
250 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
131 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
65 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
74 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
107 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
114 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
129 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
77 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
87 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
244 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 ...