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

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2
votes
3answers
2k views

Strange I2C behavior: sometime it works, some time it doesn't

I am using Arduino Ethernet with PoE and Arduino Uno boards. In recent days I implemented a working I2C bus by using the Wire library and all it seemed almost to ...
5
votes
2answers
4k views

Will crimped wire or soldered wire carry a current better?

I am running a 160amp DC current through a 1/0awg wire. Will the connection be more reliable with crimped connections, soldered connections, or screw terminals? I have looked online and it seems ...
-1
votes
2answers
753 views

How do I calculate the voltage needed to heat up a wire to a certain temperature?

The wire I am using is standard temp. nitinol wire which needs to be heated up to 45 degrees Celsius in order to be effective (move). What voltage do I need to achieve this?
2
votes
2answers
776 views

How can I power the blue LEDs separetely on this aquarium light?

I have a Beamswork LED aquarium light like this. It has a 3 way switch: All LEDs off Blue LEDs on only White AND blue LEDs on It has a single mains power plug. What I want to do is make it have ...
-1
votes
3answers
583 views

Wires resistant to frequent bending for use in headphones

I'm tired of continuously fixing wire on headphones. Can you recommend good wire that resistant to the frequent bending and thus will be last ultimate replacement as headphone wire ?
2
votes
3answers
631 views

Coaxial cable theory

Well I was learning transmission but I got a bit confused when I came to coaxial cables transmission at radio frequency. What I am lost is how the waves are propagating in the cable, I was thinking ...
2
votes
3answers
2k views

Checking materials (cheapest possible) to be used for a solar dark-detecting LED light bulb circuit

I want to make this circuit, which includes a joule thief: It's for a solar dark-detecting LED light; and I'm trying to follow this guide: ...
3
votes
1answer
192 views

Which tool do I have to use for wire connector?

I want to make the wire connector as the screen below. What tool do I need to use and how can I make it?
2
votes
1answer
180 views

Limitation of baud due to propagation of voltage over distance

I need to make sure I have my facts straight here; the math works but I may be missing something: In a 100BaseTX network over Cat-5 copper, each party has a circuit (one twisted pair) on which they ...
2
votes
2answers
141 views

Mains on a single core wire?

I have some single core wires normally used in simple breadboard circuits to handle 5V. I have built a power supply circuit on a perfboard, with a standard transformer + capacitor + 7805 build. Can ...
15
votes
5answers
12k views

How to use a capacitive touch screen without a human hand

I'm a programmer, and I usually hang out over on stack overflow, but I have a electricity question. I'm trying to interact with an APP on my phone by indirectly touching the the screen. Modern ...
-3
votes
3answers
13k views

Are all of the wires in headphones copper?

My broken headphones have different colored wires. Are the red, green and blue ones also copper?
3
votes
1answer
28k 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 ...
-8
votes
2answers
558 views

wire limits when attached to high voltage 220v [closed]

I have my home electricity wires, and I want to attach directly a set of wires that will be plugged into a controller box with power supply. that power supply was a phone charger that i adapted into ...
19
votes
5answers
3k views

Wire broke off and stuck in a header

I'm working with an Arduino, and one of the stripped portions of the wire broke off at some point and managed to get pretty wedged into the 5V pin slot. Obviously, this wouldn't matter as much for a ...
6
votes
2answers
281 views

Why do some wires in my turntable have plastic covers over them?

I recently purchased a turntable. I spent a good chuck of cash on it - and it sounds great but has trouble keeping speed. I am starting to retrofit it with a brush less motor that will be controlled ...
3
votes
2answers
554 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 ...
10
votes
3answers
1k 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
2answers
877 views

Thin profile wire joins and forks

I've a project where I'm installing some LED lighting. I am currently using crimp connectors and electrical tape to join two pieces of wire or fork wire, but I find this to be ugly. I would like to ...
1
vote
7answers
2k views

What thickness of wire should be used to power Arduino on 9 meters?

I have built a standalone Arduino device which has a few buttons, LED's and one servo. I also have a power source which on the casing says 4.9VDC ~ 700mA. (Actual reading is 5.7V). This power source ...
6
votes
2answers
6k views

How to remove enamel from wire?

I want to repair my computer mouse cable which has become disconnected from the PCB. The wire is insulated with enamel and I have to remove it before soldering it back onto the board. How should I ...
7
votes
2answers
852 views

What factors affect the brightness of electroluminescent wire?

I'm interested in experimenting with creating my own electroluminescent (EL) wire. I've seen some videos on creating your own by Jeri Ellsworth. I have a few additional questions. I understand that ...
7
votes
1answer
381 views

power cable: more strands, or bigger strands?

I have two types of 4awg wire to chose from to wire an inverter in my jeep. One of them has about a dozen 20awg wires inside of it, and the other has about 100 super little wires inside of it. Both ...
-2
votes
3answers
351 views

Prevent Water Piping from Freezing (price is everything) [closed]

I realise that there are a bunch of specific pre-made solutions for preventing pipe freezing but I think I should be able to do it way cheaper myself (I am assuming that the pre-made stuff has quite a ...
4
votes
3answers
5k views

If a wire is rated 10A, 120v AC. How many amps could I put through it of 13.8v DC?

I am using a wire that is rated 10Amps at 120v ACwith a car headlight and a SLA battery. About how many amps could this wire carry before getting warm or melting of DC current at 13.8volts?
2
votes
2answers
11k views

Fixing/Replacing Conductor Ribbon Cable

I tried to fix a keyboard that was having some intermittent issues by cleaning the conductors on the ribbon cable. I used an emery-board to rub off the rust and patina on the pins at the end of the ...
2
votes
2answers
161 views

individual ethernet cable wire uses

I'm going to use ethernet cable as a long range cable for serial (5v) and power (5V and 16V, almost no A) and I remember reading that because of the loops in the wire and the impedance effect some ...
-2
votes
2answers
23k views

4 colored wires in a cellphone charger [closed]

I'm trying to recycle an old cell phone charger to power something else. I've cut the tip off and I see 4 wires... with following colors: red, green, blue, and yellow. I can't figure out which ones ...
1
vote
1answer
62 views

How long a lead may be used to connect a component to a circuit?

When out of town I'm thinking of using an LDR with a 555-relay driver to periodically toggle the lights in a few rooms at night, and a thermistor near an incandescent bulb to kill the circuit when the ...
3
votes
2answers
1k views

What use is the reference node in nodal analysis?

Rules for identifying a reference node in a nodal analysis of a circuit include; Node with largest # of elements Max # of voltage sources Node of symmetry My question is, whats the point?
2
votes
2answers
527 views

How to fix a broken sub connection and wire?

The wire connecting to my sub has snapped off, and it brought the metal connector piece with it. I don't want to buy a new sub, but it looks like this is going to be hard to repair. Anyone have ...
5
votes
3answers
453 views

Name of connector for attaching to bolt

I have a heating element (essentially a very resistive wire) that has two threaded bolt-like connectors on each end. I want to avoid soldering any components of the heating element, so I asked a ...
2
votes
1answer
196 views

Is it possibile to manually wire a displayport cable?

I have to pass such a cable trought a small hole in a wall. Since that the connector is to big to pass trough, the only way to do so is to cut the cable, pass it and than wire it manually. Do I have ...
4
votes
3answers
6k views

How can I find out which wires are the primary wires on this transformer?

About the amp: This is from an old solid state audio amplifier with an AM/FM tuner. No digital parts or ICs were inside. It was all point to point. Unfortunately I threw out the amp and didn't write ...
6
votes
1answer
718 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 ...
16
votes
5answers
5k views

Standard wire colors

I am fairly new to "electrical" engineering as a hobby/ past time. I have always loved electricity and have made simple circuits since I was a little baby. I am now working on one of my first ...
5
votes
2answers
4k views

What does A x B mean when referring to wire strand count?

Stranded wire is often specified using two numbers in the format A x B. For example, 16 AWG wire might come with a 19 x 29 strand count. What do the first and second numbers mean?
22
votes
2answers
1k views

Alternatives to SPI because of EMI

I currently make a system consisting of a plastic enclosure which contains an MCU talking to 7 ADCs using 2MHz SPI over wires about 5cm long. The problem is that I'm concerned about EMI. ...
0
votes
1answer
1k views

about power supply on what length of copper wire we should use

Could you help me on the equivalent current of three phase alternating current having 400v( volt ), 530 kw power and the available cross-sectional area of a copper wire, its length 350 m for carring ...
1
vote
1answer
2k views

Speaker wires to 3.5mm plug [closed]

I have 4 speakers wires: left red wire right red wire left black wire right black wire Like this: I want to take those 4 wires, and make a 3.5mm stereo RCA plug for my iPod. So that I will be ...
3
votes
2answers
4k views

Which is the best, clean way to join wire together

I am installing CCTV cameras and I'm using a 3A adapter to supply power to the cameras, but I have very messy results when trying to join together very small wires with electrical tape. Is there any ...
1
vote
1answer
137 views

Is there any wire with many small wires which i can use for multiple video signal

I have 6-7 cameras at one location. The problem is i don't want to have separate cable for 8 different cameras comming to my room. I am looking for one big wire in which i can have small 12-14 wires ...
0
votes
1answer
117 views

Using Ethernet wires for DIO

I have multiple devices that need a DIO connection with 8 wires back to a central device. Would using an Ethernet cable for this purpose be reliable, or would using something like DB9 connectors be ...
0
votes
1answer
108 views

Welding Cable for Power Bus

I am considering using 2AWG welding cable from MC Master as the main power lines in a solar car. From everything that I could tell the specs are better than standard cable or battery cable, it is ...
8
votes
5answers
18k views

What gauge of single strand wire works well with breadboards?

I brought some single strand wires hoping to prototype on the breadboards. Unfortunately it was too small to properly fit into the breadboard holes. So my question is which gauge fits well on those ...
4
votes
2answers
20k views

Solder doesn't stick wires to connectors

I'm always having problems soldering wires to connectors. I've read through the Solder wont stick question, but nothing there seems to have helped. Here's my procedure: If the connector is being ...
-1
votes
1answer
180 views

13+ wire DB-25 or DB-15 cable

I can't find an answer to this anywhere so I thought I'd ask around here. I need a cable with 13 or more wires in it, preferably with a DB-15 or DB-25 connector, but I can't find one anywhere. I ...
3
votes
2answers
14k views

How to calculate thickness of cable based on material and current?

How thick copper cable should I use for 16A current? How thick it should be if I use aluminum wire? Is there any generic equation which I can use? I am using direct current with 12V but as far as I ...
2
votes
3answers
672 views

How to connect GPS module to usb cable

I need help with connecting this module with USB cable or serial cable. What do I need to connect? What channels? EDIT: Okay guys I see that you think that this gps in not so good. How about this ...
3
votes
4answers
9k views

Thin wires - tips for stripping and soldering?

Any tips for stripping and soldering thin, tiny wires like these below, (maybe even thinner!)? Initially, I would think of using a knife for stripping because wire strippers will definitely not ...