Questions tagged [wire]
A length of conductive material used as a conductor of electricity.
611
questions
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3answers
86 views
How to connect wires coming from bottom side of a single-layer PCB?
I intend to use an IMS PCB, that is a PCB with aluminium substrate. It will be a single layer PCB (because of the cost, and heat), so only the top layer.
I need to connect approx. 20 wires to the top ...
7
votes
3answers
980 views
We can ignore the wire resistance if the current delivered by the wire is low?
In this question asking about the Resistance of wire, the answer by user 比尔盖子 provided the following explanation for When Resistance Can be Ignored:
Most of the time, resistance of a wire is too ...
0
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1answer
101 views
What is the idea behind “heat shrink tubing”?
I have ordered some tubes that are labelled as "heat shrink tubing". I wanted them to cover non-insulated wires in the montage, to prevent them touching something unwanted by chance, or each other.
I ...
-5
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2answers
126 views
Can I use these wires for AC current? [closed]
I bought these wires on amazon, and I noticed in the description that they are rated for 80 volts, and are specifically not to be used for household 110v/220v wiring. However, this wire is basically ...
0
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0answers
52 views
Custom CAN-FD PCB - what to watch out for?
I'm designing a PCB which will communicate with a vehicle through CAN-FD at up to 2 Mbit/s.
The connection to the vehicle is made though ordinary twisted-paid CAN wire (around 2m) to a Mini Universal ...
3
votes
1answer
68 views
Finding free electron concentration to check authors' calculations for electron drift velocity
I am currently studying Practical Electronics for Inventors, Fourth Edition, by Scherz and Monk. Chapter 2.5.1 How the Shape of a Conductor Affects Resistance presents the following image:
I ...
10
votes
9answers
4k views
Resistance of wire
I am currently studying Practical Electronics for Inventors, Fourth Edition, by Scherz and Monk. Chapter 2.5.1 How the Shape of a Conductor Affects Resistance says the following:
The resistance of ...
0
votes
1answer
57 views
How to determine what wire size to use [duplicate]
I feel like I have gone down a rabbit hole and came out knowing nothing. I understand this is a really basic question. My son and I are building a simple RC. It is using 4 1.5v (AAA) batteries in ...
0
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2answers
71 views
Wiring colors for 'intermediate' connections [closed]
It seems to that red is the color usually used to connect to the positive terminal and black is usually used to connect to the negative terminal. However, I have seen numerous other colors as '...
-2
votes
1answer
120 views
How can a wire have 0 conductivity and 0 resistance?
First post but lurking for over a year
I bought some cheap heating pads on EBay a long time ago. 4v wouldn't get all 5 in parallel hot enough and 8v was unbearably hot so they went in the pile of ...
0
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1answer
62 views
Popped a power supply fuse - What did I do wrong?
I recently purchased a 5V 40A power supply that looks similar to this:
It didn't come with a power cable, so I found one that I wasn't using and stripped the side opposite the three-pronged side (the ...
0
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3answers
48 views
Wire size & current capacity
I recently came across with the catalogue where the wire sizes and their specifications are listed. In that, there was a specification "current carrying capacity - 2 wires single phase". What does ...
0
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2answers
105 views
Is it ever a good idea to rely on wire resistance instead of a proper resistor?
I implemented a breadboard prototype based on the circuit below (image created by a LED circuit calculator here).
The LEDs are SFH4556P. Voltage for the breadboard is provided by a wall wart adapter (...
0
votes
0answers
26 views
Capacitance of parallel wires in checkerboard pattern
Below is a cross-sectional view of a 4x4 array of inter-meshed cylinders...
$$\begin{matrix}\Huge\circ && \Huge\bullet && \Huge\circ && \Huge\bullet \\\\ \Huge\bullet &&...
0
votes
1answer
89 views
Why might a thick wire be bad?
This Battery Charger has the following line in its notes:
The connection wire should not be too thick.
Why might that be? Aren't thicker wires supposed to be better? What issue might a thick wire ...
1
vote
1answer
36 views
Cable wires - confirmation of live and ground
I bought a generic DC power extension cable and I'm trying to wire it to a connector with a cable attached. The connectors cable clearly has two wires - a red and black/+ and -. This is what I'm used ...
2
votes
1answer
85 views
Does cutting the covering of subwoofer wire affect the sound quality?
I have Sony 5.1 channel sound system. There is some cut on covering of subwoofer wire. The copper wire is not affected at all. So, I am curious to know whether it will leak the passage of sound and ...
1
vote
0answers
30 views
Why current distribution of a receiving dipole antenna depends on incident frequency?
When an incident EM wave hits the antenna, the electric field is parallel to the whole wire and start moving all electrons on it simultaneously. I understand that the current at the ends should be ...
2
votes
1answer
50 views
Does changing the diameter of a wire affect the TCR of a wire?
I have a wire wound resistor that is changing too much when being heated and cooled. I know changing the chemical composition of the wire is the biggest factor in changing the temperature coefficient ...
0
votes
1answer
69 views
Cleanest way to splice automotive wires in car?
I'm installing a remote car starter and it requires me to connect to the +12V and GND wires going into the OBD2 wiring harness.
I can cut the wire inside the car and then splice an additional wire ...
2
votes
1answer
71 views
Copper oxide on cables after tinning w/ no clean flux
We just found a problem with some (translucent) speaker wire.
We have been tinning wires for a year by dipping the stripped end in no clean flux and then dipping again in lead free solder. We have a ...
0
votes
2answers
56 views
What connector to use to non-permanently fix wires to large switch terminals?
I have a rather old rotary switch I want to use in a project. I want to connect wires to the terminals but would prefer not to solder directly to the switch. What connector is good for this?
The ...
0
votes
1answer
49 views
How to extend router wire?
I have a router with 2m wire, and it would be really useful to extending it a little. I was thinking about cut in somewhere and add 2 'nipple' (not sure if proper word) to connect them with new 3m ...
1
vote
5answers
174 views
Derating ampacity of a wire if it is stranded?
Do I need to derate a wire if it is stranded? Or will a #12 wire have the same ampacity whether or not it is stranded? Is this affected at all by AC versus DC?
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0answers
32 views
Short XLR connections via XLR 'cables' or separate wires?
I'm intending to create a so called patch box (for audio signals), with 16 channels. Each channel has 2 female XLR and 2 male XLR connectors which are tied together (all 3 wires).
The distance ...
9
votes
6answers
2k views
1 kHz clock over long wire
I will have a wire that will run up to 1000 m with many nodes connected to it. The wire will run along a CAN bus and a ground wire and must transport a 1 kHz square wave 50% duty-cycle clock signal to ...
-1
votes
1answer
133 views
Is this chip still usable?
I tried soldering jumper wires to my 3-D antenna, CAS143-47 and little bit of solder found it's way on the chip's body away from the pads.
It was my first attepmt at soldering. It looks ugly and ...
1
vote
1answer
112 views
How does length affect current carrying capacity
Will a wire have increased current capacity if the length is sufficiently small?
The reason I'm asking is that when doing PCB layout the vias often has thermal relief, which are small traces going ...
13
votes
4answers
3k views
Heat-shrink tubing available as a roll like adhesive tape?
Many people who have used heat-shrink tubing have probably experienced this: you forgot to insert heat-shrink tubing before soldering, and now it's too late!
Indeed, once the soldering is done:
you ...
1
vote
1answer
38 views
Computer controlled potential difference across wires
I am trying to design a circuit to control the potential difference across 2 stainless steel wires. The two wires are connected together at one end (common node) and on the other end, one wire is ...
0
votes
1answer
41 views
EAGLE. Differential pair routing. Width of the track changes after first change of direction
I try to route differential pair of tracks. When I click the mouse to change the direction it also changes the width
0
votes
1answer
68 views
Headset cable (with 6 cores) [closed]
First of all I am most definitely not an expert but I still wanted to try repairing my Razer Kraken headset and cut of the cable to re-solder them onto the small "regulator pcb" (because one had been ...
1
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2answers
133 views
Why these tutorials don't care about wires when using 10A with 5V to light up strip LEDS?
One popular project I want to do with my Arduino is to light up 150 LED Strip of 5 meters (WS2812B).
Here is my project:
So, I have a power supply of 5V 10A (ALITOVE 5V 10A AC to DC Power Supply). ...
4
votes
2answers
122 views
Stiff, shape-retaining insulated wires vs “floppy” ones which “bounce back” - are there actual technical terms for those two types?
Pretty much what the questions says. I find myself in need of some wires and I want to get the "floppy" ones, but I realised I don't know what the actual technical term for it is and so I don't know ...
2
votes
3answers
96 views
Can I use individual strands in cat5 or cat6 solid core wire for pcb mods / jumper / repairs?
I have a small PCB repair I need to make. I am reading that wire-warp is a suitable option. I don't have any wire wrap, but I do have tons of cat5 and cat6 solid core wire. I was thinking about ...
0
votes
1answer
72 views
junction points on schematics
Website for the wiring
In the schematics circled orange and purple I see a transistor to what I think is connected to a black wire and black and red wires connected to each other. Are these junction ...
1
vote
2answers
117 views
What to do when there is no ground cable?
I'm trying to connect a heating cable (heating tape) which is constant wattage type. This cable requires 240V. However, I realized there is no ground cable as you can see in the picture below. it only ...
0
votes
2answers
42 views
Echo in voice to the caller while receiver with headphone hving wire replace [closed]
Hi I just replaced the old wire in my headphone with new one.But while using headphone the caller hears the voices with his own echo but while me having headphone on has no issue of echo can speaks ...
11
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5answers
2k views
Understanding data transmission rates over copper wire
I've been researching the different ways to connect sensors to an Arduino, and i2c seems to be a popular method. I've read that it's only reliable at short distances (a few metres, at most), with a ...
0
votes
1answer
97 views
How to calculate temperature in Wire?
Let's say I have 1m of 2,5mm² copper wire, insulated with H07V-K.
The wire carries 40A and environment temperature is 25°C.
The wire is suspended in free air. How hot will the wire get? And how can I ...
1
vote
1answer
37 views
XT90 with AWG 10 wire?
XT90 plugs support up to 90A continous current and up tp 120A for short bursts.
On the other hand the only allow AWG 10 (5mm²) wires. AWG 10 is rated for ~50A
https://www.engineeringtoolbox.com/wire-...
0
votes
1answer
30 views
Current on each winding of a solenoid and wire selection
While I was reading an article about inductors and air core solenoids in general, I came across the term voltage per turn. Until then I thought that all of the windings of a coil are a continuous wire ...
3
votes
1answer
722 views
Why does wire gauge go down as the physical wire size goes up?
I've always just accepted this but why is it that wire gauge goes down as wire size increases? Why not the other way which would make a bit more logical sense?
i.e. Why isn't it that 40 AWG = big ...
1
vote
2answers
94 views
Using a terminal GND or VCC for multiple boards
If I have a screw terminal block like in the picture below, is it normal practice to use one of the six connections for GND towards multiple external boards?
E.g. I wrap three wires into the ...
0
votes
0answers
56 views
AWG 30 cable distance for 3.3V from ESP32
I'm planing to put some magnetic switches on my windows and pulling the wires up to the attic and use an ESP32 to notify via MQTT when they are opened/closed. I went to my local electronics store and ...
2
votes
3answers
238 views
Voltage propagation along a wire
Let's say you have a wire connected to a device that you can switch between high-voltage and ground voltage. The wire is not connected to anything on the other end. You're observing the voltage in two ...
1
vote
7answers
155 views
Wire capacity - Total power or just current?
So I've gotten myself into a healthy, educational Facebook discussion. Link is here if you're a member of that group.
When I thought about it, everyone defines wire capacity by current only. The ...
0
votes
1answer
74 views
What is the current capacity of this cable?
This is a 8 wire 0.5mm2 cable (insulator is PVC), there's 17 strings of copper in each wire.
I couldn't find the current capacity of this specific wire on their website but their 1.5mm2 x 8 cables ...
1
vote
2answers
259 views
Current capacity for Kanthal wire
I was given a Ceramics Kiln that is designed for 208V and I am trying to see if there is a way I can run it at 240V. It has 6 elements made of 16AWG Kanthal APM resistance heating wire. Each element ...
3
votes
1answer
159 views
Why does the max current capacity decrease with the number of cores for the same AWG?
I couldn’t find a similar or duplicate question yet but regarding this table for instance a 24 AWG wire can carry max 3.5A current if it is single core. But if it is seven core it can only carry max 1....
