Questions about cable types, properties, ratings and construction.

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1answer
49 views

What Wire Gauge for 4800 Watt Amp?

I'm buying a new subwoofer for a dedicated home theater that has a 4800-watt RMS built-in amp that can reach 9600-watt peaks. I'm going to have an electrician run a dedicated power line from the ...
0
votes
1answer
41 views

Assembling my own antenna cable - considerations

I need to use a 4 m antenna cable on an application. Due to non-standard cable length and some more unrelated reasons, I am considering to assemble my own cable which I have not done such thing ...
0
votes
1answer
44 views

Cable parameters calculation for a long 1000 V DC cable

How to calculate the current that is needed to charge the cable capacitance and inductance while switching DC power supply ON? And the current that is released from the cable inductance and ...
0
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0answers
22 views

Piezo contact mic with single core audio cable

Is it possible to create a contact mic with single core cable? If so what are the solder joints I need to make to connect to a piezo? This is a picture of the cable I will be using: Instructions ...
0
votes
3answers
50 views

CAN Bus Physical Layer Twisted pair or not

CAN bus is very common in automotive or vehicular applications. In our case, we are using aerial platforms with have CAN bus links between operator remote and ground control box. As is very typical ...
1
vote
0answers
51 views

Swapping colors with a VGA cable/connector [closed]

The VGA connector appears to have discrete wires for specific colors: http://en.wikipedia.org/wiki/VGA_connector If I spliced 2 cables together (or made a specialized connector) but reversed all the ...
2
votes
0answers
60 views

Direct cable to board compact assembly?

I am looking to attach a cable to board in the most compact (yet manufacturable) way possible. This does not need to be disassembled ever, it can be a permanent connection. Is there a standard way ...
-2
votes
1answer
71 views

How do you determine the length of dead soft #10 AWG copper magnet wire which will drop 2 volts when there's 15 amperes through it? [closed]

Ignoring skin effect and the temperature rise in the conductor caused by \$ I^2R\$ losses, how do you determine the length of dead soft #10 AWG copper magnet wire which will drop 2 volts when there's ...
2
votes
1answer
25 views

Cabling simple sensors 5-20 ft from a uC - tips and gotchas; UTP vs STP cables

The situation: using a simple microcontroller (eg: 5V Arduino Pro Micro) which needs to read a few sensors located about 5 to 20 feet away via cables. (This is a garage/storage area controller). The ...
5
votes
3answers
517 views

Does a Connector With Multiple GND Pins Make a GND Loop?

There are some cable standards that have multiple GND pins on the connector proper. A good example of this is the SATA connector (it has 3 of them). In reality, each GND pin has a slightly ...
0
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0answers
67 views

Best heating cable for a DYI heating blanket

I want to make an electric/heating blanket that will work with heating electric cable. I will use a computer AC adapter that output 19V 3.16A, and this dimmer to regulate the heat and a heating ...
1
vote
1answer
75 views

What kind of cable is used to connect the two parts of headphones

I am trying to replace a broken cable on my headphones(Sennheiser HD 280 PRO) but I can't figure the type of cable so that I can order it online. I think it is pretty standard as it seems other ...
1
vote
1answer
134 views

Name that connector.. and cable please

I would like help figuring out what type of cable and connector are shown in the images. I have a robotic cd autoloader and the arm stopped working properly and this cable shows signs of wear. Any ...
0
votes
2answers
72 views

What is the difference between a 2 and a 3 solder terminals socket (coaxial jack dc)

I'm not pro with electronics and electricity and I want to replace my notebook socket so I'm looking for a coaxial jack dc socket but, as I only have two cables (a positive and a negative one) to ...
3
votes
5answers
243 views

Does the color of Jumper cables matter?

Does the color of jumper cables in a circuit matter? I'm starting out with Arduino and can't get it to work at all with a breadboard! I'm thinking it's something simple like this! I know Black is ...
1
vote
1answer
79 views

Pin assignment on rj45 when using rs232

I am having a problem creating a cable to connect with two devices. The first devisce is an Intellivue MP70 that I want to connect to the RS232 port using an RJ45 end. On the other side there should ...
0
votes
1answer
63 views

What is the name of the following cable?

Instead of wrapping cables I will like to make the connection by using the following type of cable: what is the name of the female and male cable with this circular end? I will like to buy this ...
2
votes
2answers
414 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
1answer
121 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
111 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
82 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
54 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
193 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
75 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
64 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 ...
1
vote
2answers
92 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
58 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
76 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
89 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
84 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
72 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
91 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
81 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
3k 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
324 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
130 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
68 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 ...
1
vote
2answers
150 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
150 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
187 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
328 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
1k 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. ...
-1
votes
1answer
794 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
337 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
106 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
279 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
669 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
119 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
662 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 ...