Questions about cable types, properties, ratings and construction.
3
votes
2answers
99 views
How good is coaxial cable?
My question relates to the accumulated AC voltage that will appear on the screen of a length of coax:
If the cable is properly terminated at one end and fed with data (or any signal) at the other ...
-3
votes
0answers
37 views
Induced Voltage Problem Between Cables [closed]
In our application we have varied low voltage cables and there are some medium voltage and high voltage cables belongs to external system.
Some of our cables have metallic shield and some have not.
...
0
votes
1answer
90 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
votes
7answers
156 views
Why does an XLR connector use 3 pins instead of two
Why does XLR connectors use 3 pins instead of just 2. The wiring is
...
0
votes
3answers
120 views
Will a short circuit in analog A/V cables cause electrical damage to connected equipment?
Most people don't take especially good care of analog A/V cables, and they are often subjected to getting stepped on repeatedly, chewed by pets, etc.
If an analog A/V cable (component, composite, ...
0
votes
0answers
62 views
Connecting multiple jumper cables to one pin
I'm wondering if any sort of connector exists that turns a single, female jumper port into multiple female jumpers.
Think of an Arduino, imagine you want to connect multiple boards to it, but want to ...
17
votes
3answers
877 views
What does “no fit” mean in electronics?
I have found at some places, especially:
Raspberry Pi Forums
eLinux RPi Hardware page
the following wording:
S2: DSI interface. 15-pin surface mounted flat flex connector
(possibly no-fit) ...
8
votes
5answers
577 views
Why do AC-to-DC adapters have long cables on both ends?
Why do AC adapters have long cable on both ends? I believe that almost everyone using one would want it either directly next to the gadget it is powering (even possibly joined together with it if ...
0
votes
1answer
153 views
Extending an FFC cable - How?
I have a consumer device (More specifically a Pioneer P99RS car audio head unit) that I need to operate remotely, with the front panel about 3 meters away from the main unit. The front panel connects ...
1
vote
1answer
120 views
Why cable TV frequency range ends at 1 GHz?
Currently frequencies 50-1000 MHz are allocated for TV and data transfers. I understand why there are limitations for aerial or satellite transmissions, but why are they retained for cable ...
1
vote
1answer
56 views
Shielding Material of a cable
I was reading one of your previous answers related with grounding of a cable. (Which was Suggesting whether cables should be grounded from both end or single end.)
I was wondering if you can think of ...
-3
votes
1answer
104 views
Android phone USB charging has a mind of its own [closed]
I have a Sony Xperia phone. I have 2 USB-to-USB-micro cables, a power charge-only one and a data/charge one.
I connect the phone to my PC to charge the phone. When the PC is on, both cables charge ...
0
votes
1answer
579 views
How to calculate voltage drop over and power loss in wires
How do I calculate the voltage drop over wires given a supply voltage and a current? How do I anticipate on voltage drop so that the final load has the correct supply voltage?
What will be the power ...
-3
votes
1answer
80 views
How do I connect my laptop (VGA port) to a TV (HDMI port only) [closed]
I have a laptop which has a VGA port only. I want to connect it to a TV which has a HDMI port only. As expected, the TV has a HDMI cable only.
So, what would be the simplest way to connect my laptop ...
1
vote
3answers
128 views
Industrial connectors with fail-safe disconnect under cable tension (like MagSafe)
Background/problem:
We install electronic monitoring systems on semi-mobile industrial equipment. The environment is harsh and sometimes our cables are treated in a very rough manner. This can result ...
2
votes
2answers
205 views
For 3.5" mini stereo (TRS) to RCA stero cable, are any passive/active components used?
Are any passive (or active - unlikely) components used in the 3.5mm mini stereo headphone (TRS) plug to RCA audio plug converter cables, such as this one ?
Asking because, during a quick search I ...
6
votes
2answers
172 views
USB vs Ethernet cable length
I was talking to a colleague about the limitations of USB cable length and as far as I could remember it was limited by the tight window the host requires the device to respond in (mentioned here).
...
4
votes
1answer
685 views
Y USB Cable with external 5V supply
I just got a brand new Nexus 4 phone and am a bit dissappointed that it doesn't support USB OTG. One reason is that is doesn't supply 5 V out of its USB port, as opposed to other Android devices I ...
0
votes
1answer
109 views
Suitable wiring for very low current mains equipment
I'm building an interactive portrait gallery with seventy portraits, each back-illuminated by an LED lamp. The lamps draw less than 30 mA at 230 Vac, and each is switched using a small ...
3
votes
1answer
112 views
Coax cable with CAN bus
I got some Microchip CAN transceivers and some Stellaris Launchpads from TI. I would like to learn how CAN works. It looks very nice for what I want to do (one controller per room, controls lights, ...
2
votes
2answers
169 views
I2C Capacitance
I'm using an I2C interface for my e-compass and controller. The capacitance of the e-compass I2C pin is 20pF, and that of the I2C controller is approximately 40pF.
But the problem is: I want to use a ...
7
votes
3answers
274 views
Crimping tool basics
When I design a printed circuit board, I often put 100mil male header anywhere. Sometimes I think it would be better to place some connectors for more reliability. Anyone here knows which ...
1
vote
1answer
89 views
I2C on FFC or IDE cable - interference?
This is a follow-up question on this answer. I need to communicate with I2C over approximately 10cm and I'd like to use an FFC or IDE cable for that.
Earlier, I used an FFC cable to link a segment ...
9
votes
3answers
141 views
Communication among briefcase halves
I'm building a small laptop-ish device in a briefcase. Imagine the green wires aren't there. The LCD half lies somewhat deeper in its case than the keyboard part.
For now, testing and programming, ...
1
vote
2answers
296 views
Serial / UART to Bluetooth module [closed]
Im searching for a very cheap/simple UART to Bluetooth (LE) module, but all I can find are modules like the BlueGiga BLE112, which seems like complete overkill (USB, GPIOs, ADCs, etc). I also came ...
2
votes
2answers
206 views
Why some computer peripherals should not be disconnected without turning off things?
As far as I know, some cables should not be disconnected from computer while it and/or the device is running and persistent hardware damage can occur if they are unplugged errorneously.
Currently the ...
3
votes
2answers
145 views
What are these on power supply cables? [duplicate]
Possible Duplicate:
Name of this component
I've noticed that on many home electronics there are sometimes power supplies that have a bulky unit attached to the cable. I don't even know what ...
0
votes
2answers
119 views
Future-proofing home network cabling in a building with poor WiFi performance [closed]
I have a very frustrating home WiFi network.
The building in which I live is very (over 300 years) old and was long-ago extended on one side so that the (15"-thick) formerly-external wall is now ...
1
vote
1answer
77 views
Is it safe to use the cable used in Portable Battery Charger and connect to the phone via the PC USB?
Every portable battery charger have a cable. That cable is usually connecting the PC USB port to the Portable Battery Charger so as to charge the battery inside the Portable Battery Charger.
So, is ...
2
votes
1answer
133 views
Weatherproofing coax connections
I have coax-connectors connecting two cable runs that are subject to weather. Typically weatherproofing is done by wrapping the connection in suitable tape. This is a fairly messy solution if the ...
0
votes
1answer
100 views
Can shutting of power bar damage cables or modem?
I switch off the power bar which has my modem and computer plugged into it a few times per day. Two days ago, a technician changed the wiring since my Internet completely stopped working for the ...
3
votes
2answers
262 views
Is unshielded untwisted pair cabling fine for audio?
Noob here just trying to work out if there's much difference between the various types of cabling for use in connecting amps to speakers. I have unshielded untwisted pair cabling here at the moment.
1
vote
2answers
337 views
male-male VGA cable wiring
I need to build a VGA cable (assemble connectors to wire).
I need a male-male cable.
Is its wiring straight or cross? (should i connect 1-1,2-2,... or something else)
Thanks
0
votes
0answers
58 views
Multiple bluetooth LE radios connected one antenna [closed]
I have multiple Bluetooth LE antenna in close proximity using Macbook Airs. I am able to connect and disconnect from them normally with the internal antenna. I would like to extend the range using ...
0
votes
4answers
278 views
What is the universal name for this cable and where can I get PCB connectors for them?
What is the name for this style cable? I've always known them as nano-cables or micro-cables but I've seen them called sensor-link cables too.
I typically get the cable from here. However, I don't ...
3
votes
1answer
50 views
JST to JST connector
I have two JST sockets that I want to connect together.
First is on this: https://www.sparkfun.com/products/8786 second is on this: https://www.sparkfun.com/products/10161
Is it possible to connect ...
-1
votes
1answer
872 views
Micro-B USB male to 2x Micro-B USB female Y splitter adapter [closed]
I'm looking for the above mentioned splitter.
It's like this, but Micro-B USB
and like this, but reverse the male/female.
By the way, I was able to use my Samsung Galaxy S3 phone with the Samsung MHL ...
4
votes
2answers
160 views
Running Two Network Points From one Cable
I would like to run one 12 core cable (as seen on this link) though a conduit.
Would I be able to connect two RJ-45 Connections to the two ends? I know that Twisted pair cable would be better, ...
3
votes
1answer
529 views
Need formula to selecting coaxial cable type and GSM antenna
Need formula to selecting coaxial cable type and GSM antenna
I'm using a GSM modem for my application which is often installed at a basement where there is no GSM signal so I will need to attach it ...
4
votes
2answers
115 views
Industry standard Cat5e cabling
I was wondering about the industry standard for building cabling of Cat5e from the elctrical closet to the end user. More specificly from the patch panel to the wall plate.
I was told at some point ...
6
votes
2answers
381 views
Software for creating cable schematics
I'm looking for free software to create drawings of communication cables eg. DE-9, RJ-45, Ribbon Cables, and Molex. I can't seem to find any software that comes with images of the connectors that can ...
0
votes
0answers
105 views
skin and proximity effect for solid cables
I am just wondering how to compute the skin and proximity effect for solid cables. The ks and kp values in the table here:
Table
are 'just' for stranded cables etc. Thanks.
1
vote
0answers
131 views
how to wire 6p2c to 4p4c [closed]
I bought an adapter that will let me use a bluetooth headset with a landline telephone. Problem is, the connector my Cisco IP Phone 7960 series is expecting is a 4P4C, but the connectors on the ...
12
votes
3answers
1k views
Just chopped a cable, is red power, black ground?
I've just chopped a usb to micro-b usb cable.
There are 4 small wires inside
Red
Black
White
Green
Isn't it universal that Red is power and black is ground?
-1
votes
1answer
92 views
GSM/GPRS Modem : Economical & High Performance Antenna with Cable length 3meter [closed]
I am lookoing for Economical & High Performance Antenna with Cable length around 3meters. To be operated with GSM/GPRS Modem Quad-Band. Some suppliers are have RG174, some provides CLF100 and some ...
2
votes
1answer
178 views
Join together two flexible electrical cables
I have 2 electrical cables (audio cables) of same diameter that I want to join, with a connection as discreet as possible. It is common to use some dominos for this kind of task, but these are really ...
4
votes
1answer
233 views
Difficulties of I2C over wire
I want to link a PIC16F1825 and a TCN75 temperature sensor via I2C. The temperature sensor is about 1m from the MCU. Can somebody enlighten me on whether and what kind of difficulties I am going to ...
9
votes
5answers
975 views
Why do we still use cable for a lot of forms of data transmission?
Like many people I'm often annoyed by ugly cable clutter, especially when it's long distance. In my opinion it would be ideal if cables could be eliminated altogether, so that you'd just have two ...
2
votes
1answer
79 views
volumetric specific heat of insulation
Could anyone please be so kind and point me to a relevant lookup table please? I did some google searches but could not find anything. Thanks a lot.
6
votes
1answer
171 views
What is the most common type of high voltage cables?
I'm building the model of an admittance matrix for the German Grid, most specifically the Transmission grid. I only have characteristics of cables as number of cables, wires and voltage (I'm working ...
