A length of conductive material used as a conductor of electricity.

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1answer
90 views

What is the purpose of the thick blue line in this schematic?

On this schematic for a Z80 computer, there appears to be a thick blue wire connecting some components together. What is it? Googling yields no results: here is the schematic
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2answers
103 views

How can I work out if a cable can take a momentary current spike?

In this video here, almost 1000A is being run through a 10mm steel bar, and after a minute or so, it melts. https://www.youtube.com/watch?v=YzZ3aJqmT-M So in terms of charge, 60,000C applied for 1 ...
0
votes
2answers
219 views

Magnet Wire Insulation

A close examination on magnet wire tables of various manufacturers like `http://www.epicos.com/EPCompanyProfileWeb/Content/CABLES/Magnet%20Wire%20Data%20Sheet.pdf (page 9),shows that the ratio of the ...
0
votes
2answers
167 views

Pt100 wires to make Wheatstone Bridge

I'm currently trying to build a circuit on a breadboard that, through a temperature sensor, gives off a voltage which I need to amplify. I'm using a Pt100 sensor with 3 wires (red, blue and yellow) ...
0
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1answer
59 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 ...
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0answers
45 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 ...
8
votes
2answers
2k views

What is the use of magnets around electrical cables?

I haven't seen any for a while now, but a couples of year ago I saw some several times: cylindrical magnets around electrical wires. I'm not talking about specialized equipments but items of everyday ...
1
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2answers
187 views

How much AWG do I need for 12V 20A [duplicate]

How much AWG do I need for my circuit wires knowing that the current can vary 10 to 20A with 12V supply And what is the cheapest and safest way to join 2 wires together ?
0
votes
1answer
76 views

How to maximize inductance of a homemade coil?

So how can one maximize inductance of a homemade coil made out of copper wire? I assume adding a ferromagnetic core to the coil increases inductance? Also how can we calculate this inductance ...
1
vote
1answer
149 views

Formula for voltage drop vs PCB trace width, temperature, current, and trace length

I need to find out the voltage drop in the PCB traces with respect to the possible factors like: copper thickness, trace length, trace width, temperature, etc. I found some calculators available at: ...
1
vote
1answer
64 views

Connecting FT2232H board (60 MHz via 2.54 mm header) to FPGA board

I am trying to connect FT2232H breakout board (http://www.digikey.com/catalog/en/partgroup/ft2232h-evaluation-board-ft2232h-mini-module/15377) to DE0-Nano FPGA board ...
-1
votes
1answer
52 views

Elongate the power supply p4 connector [closed]

I've got pico-psu, tiny little power supply for computers. Recently I've moved onto a new motherboard, connectors on this mobo are located further than before. So I had to elongate psu-p4 connector ...
0
votes
3answers
84 views

Electrical resistance converted to wire temperature

I'm trying to get a formula that I can reuse to help me determine wire size and properties. The goal is to heat a 430' wire between 40-100F using 12 volts and 10 amps of direct current. Everyone is ...
0
votes
1answer
61 views

Can “over rated” cable impact power drain?

I am rebuilding an eGo-T (3.7v +/- 0.5) and wanted to replace the sub-standard wiring that was starting to show signs of heat damage. For some stupid reason I got rid of most of my supplies to save ...
8
votes
3answers
833 views

Flow of electrons in a wire

Electricity is "flow of electrons". My child asked me if this is so, then ultimately the copper wire should disappear/vanish/finish because the matter is moving from one place to the other. I am not ...
1
vote
1answer
71 views

Current “jumps” from one wire to the other

I have cable with two 1.5mm wires in it. Why does my test light show voltage in both wires even though only one of them is connected to 220V AC grid. // Also there are old cables with metal jacket ...
0
votes
2answers
275 views

Can someone explain what each pin does on an LM3914 dot/bar graph chip?

I got an LM3914 chip to control a ten segment bar graph, but I am confused on how to wire it. The data sheet is not helping me with what pins do what and how to wire it. I need to know how it works ...
-1
votes
1answer
167 views

How to fix exposed wire at the end of a laptop charge with electrical taper [closed]

I have a Toshiba L505D-S5965 with Windows 8.1. My charger has exposed wire at the end but it was working until a few days ago. It's at the part where it's plugged to the laptop charger port. Now it ...
1
vote
1answer
188 views

Connect broken headphone+mic wires [closed]

Does someone know how to connect this wires without using additional hardware? Thank you in advance for replies! P.S. Right item is a Logitech's and left one is SVEN's
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0answers
51 views

Analyse data discrepancies: Efficiency of wire vs current

Please help me explain why the efficiency of the wire does not follow a distinct path (ie R^2 value is low). Graph 1 Efficiency of wire vs current: http://postimg.org/image/p49bzm4ab/ Is is to do ...
0
votes
1answer
58 views

Explain this line of working when solving for the maximum power of a load resistor

Please, can you explain this line of working from the maximum power transfer theorem: For maximum power dissipation in the load, the condition given below must be satisfied $$\left. ...
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votes
1answer
59 views

Help compare my results to the maximum power transfer theorem and explain using algorithms

So below is an image of the relationship between efficiency of a circuit and the resistance of the load, as you can see the maximum efficiency occurs when the two resistances are equal. here is a ...
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0answers
113 views

Can I use Cat5e cable to carry 12V and signal for Raspberry Pi project?

I'm doing a "home automation" project with a RPi at the center. It's to do various things including a) controlling lights using PIRs, and b) automating a motorised blind. The blind is opened / closed ...
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votes
2answers
246 views

How to connect 3 toggle switches to 1 battery supply, using 1 wire

I currently have a battery supply, 3 toggle switches, and a Protoboard. The protoboard has various components connected to it, incluing two motors. I need to connect two switches to the motor pins, ...
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2answers
108 views

How do we get the proper USB charger for tablets with varying cable lengths and gauges?

We install tablets on walls that require a constant supply of charging power. We use different cables with various lengths and gauges. Most of our installs use Cat5E so we usually use 2 conductors of ...
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4answers
126 views

Large Wires on a Perfboard

I am working on a project on Perfboard which involves controlling a motor that draws about 10A, and I am using 18AWG stranded wire to connect the MOSFET on board to the battery and motor which are off ...
2
votes
5answers
557 views

Which wire gauge for a 250 amp source?

I have no real experience with this stuff... I have two 6V 220Ah DC golf cart batteries that I want to put in series to make a 12V 220Ah output that I will connect to a 3000W power inverter, my ...
0
votes
3answers
131 views

Why is voltage higher at positive wire instead of negative wire in this example?

If electrons travel from "-" to "+" and voltage decrease going through resistor why is voltage higher at positive wire instead of negative wire?
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0answers
50 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 ...
0
votes
0answers
53 views

Wire Burner gauge

A main part of this question is for the amount of Pressure (approximately 10 lbs) on the wire, so durability is needed. I want to make a wire wood burner for 3 inch thick wood. For safety and not ...
0
votes
1answer
146 views

Understanding ground symbol

If ground is a reference point and it is not physically connected how can it protect someone touching the wire from electric shock (I probably misunderstand what that symbol really means)
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2answers
137 views

How current flows

I've read about how current flows and I am confused. I probably don't understand it correctly so I am asking 2 questions If I connect 2 charged sides of battery by copper wire and I touch that wire ...
1
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1answer
67 views

Understanding current flow in example

When I have series circuit with 3 light bubbles the voltage in second should be less than in first and the voltage in third should be less than in second. Conventional current flow is from positive to ...
6
votes
3answers
326 views

How durable is the insulation on magnet wire?

I'm planning a light sculpture. It will consist of a large number of RGB LEDs mounted on a tree-like galvanized steel frame. Each LED has four wires -- GND, +5V, data-in and data-out. For aesthetic ...
0
votes
1answer
76 views

Calculate delay in long line

Assume we are connecting a lamp to a source but line (wire) is so long (for example 20Km): Will the lamp bright after connecting the source immediately? how much time it will be? Can we calculate ...
0
votes
2answers
176 views

Why is speaker wire so thick? [duplicate]

Comparable to standard house wire, which carries much more current for powering high power devices like vacuum cleaners etc, speaker wire seems to be unusually thick, and tends to be stranded, which ...
1
vote
1answer
117 views

Calculate gauge of wire with voltage and current

I would like to figure out these two things: X gauge of wire needed dependent on the current needed, and the length. X max length of wire dependent on the current, and the gauge.
2
votes
1answer
203 views

Current capacity of copper wires in vacuum

I’d like to know the current carrying capacity of copper wires in vacuum. The current plan (NPI) calls for sending ~3 amps through the vacuum space of a cryostat. Has anyone done this? Have any ...
-1
votes
1answer
95 views

Assembling JST PH connectors

I assembled a few JST PHR-4 connectors with wires (manually crimped SPH-002T-P0.5S crimp terminals with AWG24 wires and inserted it into the PHR-4 connector housing). When I tried to join connector ...
0
votes
3answers
83 views

Need assistance in identifying wire

I'm working on a LED project similar to the one in the picture, and I need to identify the black wire that the arrows are pointing to. What are those called? Here is a picture:
-1
votes
2answers
97 views

I just bought a one-earbud headset with a microphone, but the jack is too small! I cut it open, what do the wires do? [closed]

So, yeah, this is my first question, yay, but I still have a problem, boo. I was on a rummage sale spree, so-to-speak, looking for a new pair of earbuds as yet another cheapie pair has broken. I ...
-1
votes
3answers
135 views

Why is the led that I hooked up with my laptop blinking?

I connected a led to my laptop through a USB cable. I connected the red wire to the positive end of the LED and the black wire to the negative and of the LED. Why does the led keep blinking (pulsing) ...
2
votes
3answers
276 views

What kind of metal are the legs of resistors made from?

Can anyone tell me what kind of metal is used in electronics to make wires going in/out to the elements? Can longer of this metal wire be found anywhere? Actually I am looking for sth like copper wire ...
-1
votes
1answer
180 views

Transmitting 12v DC over a long wire

I'm trying to charge my laptop through a 12V battery and 12-19V adapter over a long wire but I've noticed that the adapter makes some noise and doesn't work. On the other hand when I connect it close ...
2
votes
1answer
75 views

What is the mechanism by which corona discharge damages wire insulation?

I understand that corona discharge can damage wire insulation over time. How? What exactly is happening to the insulation that it ceases to become so insulative?
4
votes
1answer
415 views

How to best run long distance low voltage electric

I am looking into options for running 12 VDC approximately 2000 feet to power some remote equipment. The equipment will have a low current draw (2A max). I am seeking to keep the cost low. Copper ...
13
votes
3answers
2k views

Will doubling thinner wire in lieu of thicker wire work?

I've been needing a jumper cable for a while and have plenty of 10 AWG copper wire lying around. From what I've read, 6 AWG wire is recommended for jumper cables. I want to make a 7 foot cable. So, ...
2
votes
1answer
133 views

How to strip wire using Wire Wrapping Tool from OK Industries

For learning wire wrapping, I have a wire wrapping/unwrapping tool from OK Industries (HW-UW-3C) and some 30 AWG wire wrapping wire. Is it possible to use this tool to strip the wire?
1
vote
1answer
109 views

Headphone wires without insulation

I have some quality earbuds that have no sheath on the wires, because the copper unwinds all by itself, it's held in some thin nylon loose fibres that acts as the insulating material. it's seems very ...
2
votes
1answer
168 views

Name of socketed PCB jumpers

What is the correct name for those little jumper cables, with a small socket each end, designed to go between header pins on PCBs. A bit like these, but singles ...