Questions about cable types, properties, ratings and construction.

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1answer
43 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 ...
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1answer
45 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 ...
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0answers
15 views

(Battery Charging) What voltage / A charger I can use to charge 18650 [closed]

I bought Shenzhen Ferei Lighting Co.,Ltd (18650) battery. It is 2600mAh 3.7V. I'm wondering which charger I can use to charge it. I have Kangertech e-cigarette and it has a micro-usb plug integrated ...
3
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3answers
118 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 ...
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1answer
36 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 ...
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3answers
160 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 ...
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1answer
44 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
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2answers
71 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
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1answer
134 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 ...
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3answers
106 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 ...
2
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1answer
66 views

Connecting cables when end point rotates 360

I need to be able to rotate raspi camera 360' by motor and up/down by servo. The problem is that when I rotate it 360', all camera cables will tangle up. What is the method to make it right? I need ...
3
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3answers
79 views

Long 24V DC cable not working

We have a really weird issue which we just cannot get our head around. In high level: We have a unit which contains some electronics, we can access it with 4 cables 2 for power and 2 for ...
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1answer
65 views

Calculating attenuation of coax cable run

This question is related to my question about long-distance Ethernet. I discovered the Netsys NH-310C, a reasonably-priced device for converting Ethernet to coax for long-distance runs. The ...
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1answer
33 views

Ribbon cable for Logitech ClearChat Wireless headset [closed]

I'm looking for the name of this cable, which is used in a Logitech ClearChat Wireless headset. Or a cable with the same endpoints so I can use it as a replacement.
0
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1answer
27 views

Best way of connecting ATMega32 to LCD with 16 pin

I am trying to control LCD ADM2004D with ATMega32 AVR microcontroller. This type of LCD is 20x4 character, has 16 input and I am going to connect the main board to this LCD. I may need to disconnect ...
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3answers
59 views

What makes cables suitable or unsuitable for a given purpose?

I've been working on a homebrew set of VR Goggles w/ head tracking, and am just beginning to plan the cable that will connect the parts on the user's head to the electronics on the main unit (which ...
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2answers
65 views

What is the bold part on monitor and some charger cables [duplicate]

On many monitor or chargers, there is a bold part: First of all, what is it called? Then, what does it do? Does a cable without this part have any advantages as we see nowadays many chargers ...
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1answer
46 views

Two cables, same resistance, different lengths, speed of current transfer

If I have two cables, with different size, but in total the same resistance, what will be the speed of the current transfer( how much time will it take the voltage to appear at the end of the cable). ...
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1answer
42 views

AC adapter splitter

I'd like to power 2 or more devices (all requiring the same voltage) with a single AC adapter, instead of using multiple adapters. Is it safe to use one of these splitter cables? In my case, i have: ...
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0answers
59 views

does changing the cable length of NTC temperature sensor affect accuracy?

I'm using an off-the-shelf STC-1000 temperature controller, popular with homebrewers, that uses an NTC sensor to read temperature and switch on a relay to cool or heat when the sensed temperature ...
-1
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1answer
57 views

How to connect speaker cables via S-Video plug [closed]

I would like to buy a speaker system consisting of an active subwoofer and two satellites. From the photos I can see, that the satellites are connected to the central sub using supplied cables with ...
1
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2answers
76 views

transfer analog signal via RJ45 cable

I want to use a TMP36 temperature sensor, so I thought to transfer the signal through an RJ45 cable. (Is that equal to a cat5 cable? I just used an old ethernet cable) When I use the sensor next to ...
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1answer
52 views

How can I build a RGB+CSync to SCART video cable for a vintage camera control unit?

I'm an associate professor at a university in Japan, and last year I discovered that my university has two working, vintage Sony DXC-M3A Saticon tube video cameras, along with accompanying power ...
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5answers
2k views

Why is USB cable maximum length is shorter than in RS232?

Why do we need to buffer USB signal if the cable is longer than 5m? Is that because a signal voltage drop? Is that because it drives currents?
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1answer
91 views

Does USB Power Delivery handle USB cables that are not PD-aware?

I think USB-PD is still fairly new (I don't know anyone who owns a device that has it) but reading wikipedia and info sites does not make it clear what happens when you use a cable that is out of spec ...
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1answer
63 views

How to make cables for 0.1 in. pitch pins?

I'm trying to make a cable for a 4 wire interface to a stepper. The intention is to have a short cable attached to the stepper, a male piece on the PCB board, and a bridging cable that can be replaced ...
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0answers
30 views

What polarity is represented by the black with white stripe on DC power cable? [duplicate]

I have a 12V DC adapter that is bricked I want to change it, and I don't know the polarity, this is the photo: What polarity represents the black with white stripe cable?
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1answer
68 views

What Type of cable is this?

I know someone who needs a longer version (12ft) of this cable for their TV, but I do not know what type it is. Can someone please identify the ends for me so I know what to shop for? The cable is ...
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1answer
84 views

Sending power to passive subwoofer via RCA connections

I have a home theater receiver with a powered subwoofer output and a matching passive subwoofer. I've always connected these two items using speaker wire. Recently I moved into a place that has ...
0
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2answers
96 views

What is this cable-joining black shell component called?

What is the name of the oblong black shell thing that is (presumably) connecting the two halves of the cable? There is a small one and a large one shown in the image below. I've searched around for ...
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1answer
49 views

Identification Request: 10:4 pin cable

What are cables like this called? (Bonus: what are the parts called?)
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1answer
55 views

Custom USB PC-PC Interface

I would like to build a software interface using the usb4java library, for sending triggers for synchronization with the following specifications: Latency below 1 ms Range: 8-bit [0, 255] + bit [0, ...
2
votes
3answers
246 views

Short circuit protection of cable

I know cables are protected from short-circuit by using fuses / circuit breakers. Cables have I²t curves, which should be checked with fuses or cb's I²t curves in time / current chart. Here I have ...
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0answers
31 views

Where to source the plug end of a PC power cable [closed]

Im building a relay control system, and Im currently using some modified 125v 10a pc power cords with a receptacle on the other side, and the normal female plug on one. The problem Im having is ...
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0answers
47 views

Sense continuity in cable and lock with MCU

I'm building a "smart" cable lock system where the user will put a steel fitting attached to the end of a steel cable into a lock aperture, after which the presence of the steel fitting needs to be ...
2
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2answers
76 views

Wire for harsh environment

One of the jobs I often have to perform is repairing the infra-red sensing headsets for BattleSports equipment. Basically the headset consists of a pair of IR detectors and red LEDs for indication. ...
0
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0answers
51 views

Can power be extracted from a cable that is supply something else with power

If a cable is supplying a TV with 200W, is it possible to somehow wirelessly tap into some of the power flowing through the cable? Would it be possible to extract enough to power something like an ...
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4answers
179 views

How dangerous is a bare wire?

My cable to charge my iPad has recently exposed some metal wire (due to the plastic insulating splitting). How dangerous is such a wire? If I was to touch the wire when plugged in to the mains, what ...
2
votes
2answers
96 views

Sensible standard wiring type for long-range I2C

I'm planning on interfacing with some sensor devices via I2C over a long bus, with devices chained every 2m or so, up to 16m in total. I've seen other questions here referring to this from the "which ...
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1answer
45 views

Shielded sleeve?

Does anyone know of sleeving that is basically a hollow tube with a metal shield? Something like coax but without the core? I need to take some unshielded wires and run them through a flexible RF ...
0
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1answer
70 views

can signal ground be carried in the connector shell?

I have a cable with 6 pins but I have 6 signals and I don't have space for the signal ground. If the shell is continuous from end to end, would it be fine to use that as the signal ground?
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1answer
85 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
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1answer
55 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
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1answer
83 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 ...
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0answers
34 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
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3answers
310 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 ...
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0answers
82 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 ...
3
votes
1answer
99 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 ...
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1answer
75 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
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1answer
35 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 ...