Questions about cable types, properties, ratings and construction.

learn more… | top users | synonyms

8
votes
3answers
866 views

Can I accidentally create a coil with a bunch of isolated cables?

I just finished rearranging furniture in my room and I ended up with a lot of cables next to each other, some of them powering electronics that draw a few hundred watts. Is it any risky - for example, ...
0
votes
2answers
33 views

Increasing loss of cables to attain dynamic range

RF newbie here. Trying to learn about cables and losses and how they contribute to dynamic range. I'm creating a shielding effectiveness system for enclosures with a 120dB dynamic range using signal ...
0
votes
0answers
44 views

How to sense 2khz signal at open end cable

I had a project to sense the signal passed through open end single core cable. The single core cable connected to 2khz signal source. The objective is to detected the signal by attached probe near the ...
1
vote
1answer
57 views

Joining power supply cables

Suppose I have a power supply with 2x12V cables. The 12V has been split into 2 inside the power supply. What happens if I join these power lines together in parallel, from an electrical properties ...
0
votes
3answers
72 views

How would I design a cable line that doesn't leak heat to the ground surface?

A loaded underground power cable dissipates some power as heat which heats the surroundings. The following scenario is possible in regions where large amounts of snow accumulate on the ground during ...
3
votes
2answers
95 views

Downsides of using a Heavy Guage wire with Low Amperage?

I understand that different gauges are available for different amperages. Is there any downside to using a cable that is able to support a high amperage, for a low amperage?
0
votes
0answers
22 views

Cable Label Types?

I have some 4-wire PT100 probes which are of course connected to a relatively thin cable. After calibrating, which is an expensive process, I need to attach a label carrying a serial number. The ...
0
votes
0answers
40 views

Why my turntable has less resistance on right channel and has also lower volume than left?

My turntable never had the same volume on both left and right channels. Left channel is about ~10-15% louder so I decided to measure their resistance between the RCAs and the cartridge. Left was ...
1
vote
2answers
169 views

Color-coded 50 Ohm BNCs

I would like to use some color coding in our experimental rig (microscope). All BNC cables so far are black 50 Ohm, and I'd like to use some yellow, red or any other very-not-black colors. I can't ...
1
vote
2answers
95 views

I need to transmit 100khz /90khz FSk at 9600 baud over 4km

What cable characteristics should I look for when designing a copper (or other) conductor cable for transmitting FSK @ 100kHz/90khz, 3V pp in order to achieve a maximum attenuation of not more than ...
0
votes
1answer
60 views

Re-attaching A Cable To A Circuitboard [closed]

I have a drone, but one of the cables connecting the battery to the circuit detached and I took it apart so I could have better acces to the circuit board. I know where the cable goes but my problem ...
7
votes
2answers
591 views

How does a coaxial aerial cable work?

My family and I managed to break the aerial cable of our TV a few days ago. The cable is of this kind of design: And I believe its called a coaxial cable. Fortunately, someone more practical than ...
0
votes
0answers
58 views

limitations of using BNC patch panel

What are the limitations of using BNC patch panels for short-scale experimental setups? Currently our microscopy setup have around 12-20 BNC cables that carry trigger and modulation signals from/to ...
-2
votes
1answer
41 views

Data speed (fps) significantly decreased on USB camera [closed]

I have a 5 meter long inspection camera bought on ebay (here), getting 30 fps @ 640x480. I was measuring the resistance between D+ and D- while connected (DP, DM in the actual image), just for fun, ...
0
votes
4answers
335 views

How much power can a 20AWG USB cable safely handle?

I recently got a device that uses a USB cable (USB on one end and a power connector on the other end) as a charge cable. The device draws 16.5V, 3.65A Max. I want to extend the charge cable by using ...
0
votes
4answers
72 views

JTAG connector - large pitch to smaller one

I have a Segger's Jlink EDU probe which I used for debugging and programming various ARM based MCU's. But now I have to work with this LPC4088 QS board which has a smaller pitch 20-pin JTAG connector ...
1
vote
2answers
84 views

How to determine length of coax to get a certain delay?

This is a follow-up to How to make a phase shifter?, it seems one answer is to simply have different lengths of coax going to each antenna. However, how do I calculate the difference in length given ...
0
votes
1answer
37 views

Throughput and speed of data transmission cables [duplicate]

What are throughput and speed limiting factors in an ethernet or any other type of cable which is used for data transmission?
1
vote
1answer
146 views

How to make UART-UART cable

I am software developer and I need to make cable to connect this http://lib.chipdip.ru/036/DOC001036112.pdf usb adapter (which I connect to USB port of my PC) to UART port of my A13 Olinuxino. As I ...
0
votes
2answers
53 views

Using 3.5 mm cable to connect load cells?

I have some 300 lbs. 4-wire load cells that I need to connect to a PCB. Their nominal resistance is 350 Ω, and they will be excited at 3.3 V. The goal is to read the force on a PSoC microcontroller. ...
0
votes
1answer
80 views

How do I repair these wires? [closed]

In the past I have occasionally repaired broken wires in various electronics around the home. However when trying to repair this cable for a Logitech USB headset, I discovered the wires are different ...
0
votes
2answers
86 views

SATA over unshielded cable

I need to connect a SATA device to a development board which does not have a dedicated SATA connector but exposes SATA over a common 2x30 female header instead. My question is what cabling do I need ...
0
votes
2answers
79 views

Shielded cables to capacitive sensor?

In a hobby project I am using shielded cable to connect capacitive sensor's electrode (see Capacitive touch not working (AT42QT1011) ) to the AT42QT1011 (there are two cables ending with electrodes ...
0
votes
1answer
66 views

USB data cable that doubles up as a USB storage device

Is it possible to create an USB to micro USB (or lightning) cable that has storage built into it? So if it's plugged into a computer with no phone, the computer recognizes it as a regular USB ...
0
votes
0answers
28 views

field inversion meaning in underground cables?

In one sentence that talks about the conductor in underground cables says: "If the gradient of conductivity is sufficiently large, a field inversion phenomenon can occur. This mean that the electric ...
2
votes
1answer
160 views

12V battery - T1 vs F1 terminals

I recently purchased three 12V batteries: #1, #2, and #3. They all say that they have T1 terminals; however, when looking for the appropriate connectors for my 18 AWG wire, I could really only found ...
0
votes
1answer
375 views

Why is it dangerous use a coiled extension cord

What aspect using a coiled extension cord makes it more dangerous than using an unrolled power cord. Many fire safety websites reference that an extension cord should not be used while coiled. Is ...
0
votes
2answers
84 views

Finding out the length of a cat6 cable

I noticed this tester had precise length readings of short cables. I decided to plug a very long cable (almost a full pack) and was surprised to see it still gives a reading. 232 meters: Adding the ...
0
votes
1answer
79 views

What are these cables in my walls for? [closed]

Can someone help me identify what these cables are for? I'm guessing (and hoping) the one in the bedroom is for a cat 5 wall socket -- and that these corresponds to some of the cables exiting in the ...
1
vote
3answers
99 views

9 Pin D Plug Cable Assembly: Fitting more than one thing into a solder bucket

I want to terminate a cable in a 9-pin D plug. The design I’m working on needs a resistor and two capacitors at the terminals of the D plug. I can’t work out how to successfully work Pin 7 – I need ...
2
votes
3answers
145 views

How to design connectors when I do not know what the customers want?

My PCB needs to export four sets of voltages to our customers' PCBs. Eight pins in total are needed. Eight pins at my side are to be connected with eight pins at customer's pcb side. Our pcb is to be ...
0
votes
1answer
139 views

What is this cable called?

What is this cable called? I need to extend it with a male to female cable.
1
vote
2answers
160 views

Can I use a Cat 5 cable with Arduino

I want to connect my circuits together, but the problem is that the distance they have from each other are longer than my jumper cables can reach. So I had the idea to use a Category 5 (Ethernet ...
1
vote
1answer
67 views

Max load supported by a single pin of ATX 24-pin connector

I have a requirement where I need to control around 20 solenoids which is housed separate from a Raspberry pi, ATX PSU and veroboard containing my logic circuit. For convenience I will call them ...
-1
votes
1answer
76 views

How to connect a headset as a microphone, and speakers at the same time with only one cable [closed]

So, I recently bought a headset from Tritton, named "Kama", as I got home I noticed a unusual problem... The audio input and output are in the same cable. I would really want to use this as both, but ...
10
votes
5answers
2k views

Max Serial Cable Length?

What is the maximum length of serial cable I can use, to connection work properly? Is length of serial cable in connection with baud rate? I am using about 5 meter cable at speed 38400 bauds and RS232 ...
1
vote
1answer
64 views

Earphone cable resistance [closed]

Earphone cables are usually very flexible - does anyone know how much resistance they tend to have? Are they cable of carrying 2A at 5V? My guess is that they are copper strands, but I'm not sure how ...
0
votes
2answers
37 views

Find which wires are what in a sjt power cable

I'm trying to figure out what wires are live, neutral and ground in my computer power cable. I'm getting some weird readings from the wires. ...
0
votes
0answers
56 views

Reason for radio device functioning only when connected with cables between connectors

I have a prototyped board with a 2x4 female connector which is supposed to connect to a NRF24L01+. If I plug it in directly it's not working, however if I connect cables between them everything is ...
3
votes
2answers
929 views

Skin depth at 50 Hz is much longer than the thickness of the shield of a coax cable. Then how does it work?

The title already narrates the question. We know that using a coax cable for audio amplifier input remarkably reduces 50 Hz noise. However the skin depth of the EM radiation at 50 Hz for copper is ...
1
vote
1answer
190 views

Why is Cat5/Cat5e Ethernet cable rated 100MHz?

As the questions says, is there any specific reason why Ethernet cable is rated 100MHz? For a 100Mbps Ethernet the data rate is 100Mbps, and the baud rate is 125Mbaud, because of the specific line ...
1
vote
1answer
54 views

Cable Swivelling

Is there an elegant way to allow a cable to swivel? By swivel, I mean to allow infinite rotation (not limited to a few turns, etc) between the two connectors along the axis of the cable. Say, for ...
0
votes
1answer
62 views

How to choose the right cables for medium/high voltage applications?

After two years, I will graduate as an electrical engineer. My job will require installing bulbs, Washing machines, heaters, refrigerators and air conditioners ... etc. I know that each device ...
3
votes
3answers
232 views

Why do cables have multiple grounds?

Many cables have multiple grounds. Why? For example, according to Wikipedia: The SATA standard defines a data cable with seven conductors (3 grounds and 4 active data lines in two pairs) and 8 ...
1
vote
1answer
80 views

Single cable for dual Ethernet plus power (PoE)

I would like to run two 100 Mbit Ethernets including a common PoE over a single cable which will be about 3-5m long. Since 100 Mbit needs 4 wires I will need 8 plus some wires for the PoE which is at ...
3
votes
3answers
452 views

Adding 90 ohm resistors to DIY USB cable?

I just started with electrics a few months ago, but now I am obsessed but still have MUCH to learn. What I am doing is essentially trial and error. I needed a longer USB cable to a printer so I took ...
0
votes
1answer
113 views

Tethering a TO-92 IC to a PCB

I need to tether a TO-92 package IC to a PCB - as shown in figure below. The cable length would be less than 50mm. Questions: How can I achieve CONN1 - i.e, attaching a cable (comprising of at ...
3
votes
2answers
190 views

Coaxial cable vs shielded pair

I need to wire a sensor with analog output to an acquisition system, and the presence of a separate "shield" connection on the DAQ made me thinking: why would I use a shielded 2-wire cable versus a ...
3
votes
1answer
233 views

What is this type of radio fm antenna connector called?

I'm looking for an antenna replacement for my dad's busted radio (iHome IH8) and I'm having some trouble finding the name of this type of plug. The only things I find when searching online are coaxial ...
0
votes
3answers
119 views

What is the small barrel type connector called?

I just ordered a barrel connector but it's bigger then the one i need, What is the small barrel type connector called. My original one has a yellow ring around it, Is that an indicator of what type it ...