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Questions tagged [wiring]

How wires connect to terminals and to each other; coloring and organization schemes; appropriate wire selection and installation techniques

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40 votes
3 answers
71k views

What's a schematic (compared to other diagrams)?

What's the difference between a schematic, a block diagram, a wiring diagram and a PCB layout? Why do engineers want a schematic instead of a wiring diagram? Where does Fritzing fit into this?
JYelton's user avatar
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46 votes
5 answers
54k views

Is the neutral wire considered safe?

If the neutral wire carries current, why do many people believe that it's safe? I've heard "You can touch the neutral wire/bar in the breaker box and not get shocked. Only the hot can hurt you." If ...
Stephen Melvin's user avatar
17 votes
1 answer
109k views

Wiring diagram for USB-C to USB-A cable?

I make USB cables (USB-A to Mini or Micro primarily), but don't have any experience with USB-C. I would like to create a cable that has a USB-A (2.0) connector on one end, and a USB-C connector on the ...
rockwell's user avatar
  • 273
38 votes
3 answers
9k views

What are those weird wires in the audio cables?

Trying to repair a headset cable, I discovered that it doesn't look at all like the “ordinary” cables I used to repair. I was expecting to see, inside the cable jacket, four wires, each one in a wire ...
Arseni Mourzenko's user avatar
13 votes
3 answers
2k views

What's the purpose of such weird wiring inside this smart card?

Here's a scan of a stripped MIFARE Ultralight smart card That's some plastic film with (I assume aluminum) foil wiring acting as the antenna for both powering the chip and providing radio ...
sharptooth's user avatar
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0 votes
4 answers
684 views

In any electrical equipment having single ph 230 v ac supply ,if neutral and earth wire exchanged then what will be the consequence

I am handling the supply in a locomotive coach and have noticed that the neutral and earth wires have been accidentally flipped,inside the appliance(hot case) is there a problem from the safety point ...
Amal Vincent's user avatar
58 votes
2 answers
800k views

What do solid/striped lines on a wire indicate?

What do solid or dashed lines on a wire indicate? Is there a difference between the solid and dashed indicators?
Mark Harrison's user avatar
4 votes
3 answers
1k views

Need connector suggestions

I have an outdoor electronics project which is running 5V DC through 12 AWG wire to power strands of LEDs through 24 AWG wires. The strands are powered in parallel like so: ...
wckronholm's user avatar
41 votes
6 answers
14k views

Why does my circuit work on a breadboard, but not on a perfboard? I am new to soldering

I'm a total beginner when it comes to soldering, and recently I've been trying (and failing) to solder together a simple circuit I put together for a Raspberry Pi sensor. Although it works fine on ...
Sebastian Villate's user avatar
28 votes
10 answers
37k views

How do I power/wire something that is rotating constantly WITHOUT extra batteries?

So I want to make a Lazy Susan that is rotating constantly in one direction. I also want to have some other things on top such as neon signs, moving things, and etc. Problem is I want this to all run ...
Sie's user avatar
  • 437
15 votes
3 answers
35k views

What does it mean when there is a voltage difference between ground and neutral?

Between ground and hot there's approximately 120V as expected. I had expected the voltage difference between ground and neutral to be 0v, but instead it's 0.4V. Why would this not be the case? Is ...
Mark Harrison's user avatar
15 votes
3 answers
3k views

Can you identify this component?

This may be obvious to some, but not to me. I am an IC design engineer, as such I rarely do any practical work. This morning I had to fix some electronics which were custom made by a third party for ...
IC_Eng's user avatar
  • 320
14 votes
4 answers
14k views

How to best attach a wire to a switch without soldering?

I've got a switch like this one: Now my (quite novice) question is: How do I best attach a wire to the connector without soldering, e.g. for quickly trying something out? Right now I've folded the ...
Golo Roden's user avatar
11 votes
1 answer
6k views

Does an ungrounded shielded cable shield at all?

Does a shielded cable provide any shielding if the shield isn't grounded? Would it be practically different than an unshielded cable?
aswine's user avatar
  • 243
10 votes
3 answers
15k views

How is transition from three-phase distribution without neutral to three-phase consumption with neutral achieved?

A typical distribution grid supplies 6 or 10 kilovolts AC to a substation near the consumers. This is typically done with a three-phase line without neutral - just three wires going in parallel. Then ...
sharptooth's user avatar
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10 votes
3 answers
1k views

What is the difference in this specific breadboard wiring?

As an absolute layperson in electronics I just found out that an LED only lights up when connected like in figure 1 but not when connected like in figure 2. And I just don't get why? I know an LED is ...
JohnnyFromBF's user avatar
8 votes
4 answers
5k views

Ethernet Without a Switch?

How do you wire up Ethernet electrically without a switch? An approximately equivalent phrasing of this question would be what is going on electrically inside an Ethernet Hub? To clarify, I'm not ...
vicatcu's user avatar
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4 votes
2 answers
1k views

How to power a button's LED within a guitar?

I'm working on a guitar, and the plan is to use three latching push buttons so that each pickup can be turned on and off individually. I'm fairly confident that the following diagram should work for ...
kthornbloom's user avatar
3 votes
3 answers
3k views

(When) Can I use Cat5e wiring to carry a POTS signal to a DSL modem?

According to this answer by @asndre, It is very bad idea to use Cat5e-based wiring/cabling to establish a xDSL connection. However, my telephone/internet provider technician recommended -- and ...
LarsH's user avatar
  • 140
2 votes
3 answers
357 views

Can we connect multiple devices to the mains with just 1 cable?

The project: An Arduino DIY Relay-controlled aquarium with a water pump, a heater, and a light bulb. All 3 have the exact same wires according to the EU standards: 1 "hot" brown wire and a ...
Mito's user avatar
  • 411
1 vote
2 answers
4k views

Solenoid Valve - Transistor or Relay?

bit of an amateur looking for some advice. I looked at the other question concerning my problem but i didn't find what i was looking for. I need to switch ON and OFF a solenoid valve using my RPI. I ...
Logan Bauduin's user avatar
1 vote
1 answer
166 views

How To Connect Silver Wire Electrodes to Transimpendance Amplifier

As the title suggests, I need to connect silver electrode wires that are about 1 inch long and 1mm diameter (sticking rigidly out of a microfluidic cell) to a transimpedance amplifier. The problem is ...
Gerald Wilson's user avatar
1 vote
1 answer
552 views

Determine 4p4c wiring

I tried to make this as thorough as possible. I have a 4p4c socket + cable here. As there is no manual for german wiring I had to measure each wire against each other wire while hearing the "ready to ...
Zurechtweiser's user avatar
0 votes
1 answer
177 views

What is "mains outlet tester" (for proper wiring) in the context of US power connector standard?

I'm curious about this comment. It says what ... in the US or UK you should be able to go to a hardware store and buy an outlet tester for very little money. This is a little plastic housing ...
Free Consulting's user avatar
0 votes
1 answer
2k views

Fixing a headset, TRRS [closed]

First of all I'm not sure if this is the correct site for this question but: I am trying to fix a head phone jack for my headset with a TRRS headphone replacement. This is the connections of the ...
ErickES7's user avatar
  • 101
0 votes
2 answers
4k views

wiring LED's in parallel - need series resistor?

I would like to confirm something I have inferred through my looking into LED wiring and also have a couple questions answered. For the sake of the examples below assume the source voltage is 5v; my ...
William's user avatar
  • 349
0 votes
1 answer
1k views

Integrating momentary switch with a Raspberry Pi

Please note: Although my question involves a Raspberry Pi, this is a pure electronics question at heart. I'm trying to figure out how I can wire this illuminated momentary switch to my Raspberry Pi 1 ...
smeeb's user avatar
  • 797
-1 votes
2 answers
1k views

Cable type and decreasing EMI/RFI

I am interested which cable/wire type is better to protect against electromagnetic and radio interference/leakage of signal. Is a twisted pair wire better than an untwisted, to protect against EMI/...
Jensen68's user avatar
24 votes
4 answers
52k views

Difference between maximum amps for chassis wiring and power transmission

I am putting together a test system that'll be carrying over 50Amps. I need to rate the wires that will be powering the device under test and also querying voltages and signals on the device. ...
SeanJ's user avatar
  • 929
23 votes
9 answers
104k views

Why is the chassis used as ground in automotive electrical circuits

Automotive electronics generally use the metal chassis as the negative ground connector for the DC circuits. Obviously this saves something on wiring. Is there an electrical reason for this approach? ...
bib's user avatar
  • 333
21 votes
6 answers
15k views

How does earthing work when earth is dry?

Earthing is meant to provide reliable contact of an electric appliance to earth so that if there's an insulation fault current goes into earth instead of through a person's body. This requires ...
sharptooth's user avatar
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16 votes
10 answers
6k views

Best practice in transmitting sensor analog signal over longer distances (approx. 100') -- in cost sensitive products for microcontrollers

I'm looking for best practices for transmitting an analog sensor signal over long distances to a microcontroller such as the Arduino running at 3.3v or 5v. Keeping costs low is imperative. SPI and ...
risingtiger's user avatar
12 votes
6 answers
33k views

Schuko plug wiring

Why it is not important where we connect our hot and neutral wire when connecting them to our Schuko plug? Is it because current flows in both directions? It is only important that our ground wire is ...
Junior's user avatar
  • 1,039
12 votes
7 answers
15k views

Lack of Earth wire

Electricity connections where I live don't have have earth wires, only live and neutral. I don't have any problems with it but if I touch metal parts of any desktop computer, It does what coffee can ...
asim's user avatar
  • 600
11 votes
4 answers
7k views

Altium says my labels are floating

Been using Altium and multi sheet projects for a while. My latest project involves a lot of signals so I'm trying to keep things tidy using lots of labels, ports, busses. So I have a bus for enable ...
Claudio's user avatar
  • 121
11 votes
5 answers
3k views

Anything special to consider when running a 12v "Bus" throughout my house?

I've recently begun playing a lot with tiny programmable computers/controllers (like the Raspberry Pi and the Arduino), and I'm planning to distribute several throughout my house as various sensors. ...
loneboat's user avatar
  • 320
9 votes
3 answers
25k views

Splitting wires for newbies

I'm in the process of getting ready to build a car PC running Linux. One of the features I'd really like to incorporate is the ability to record car statistics from the sensors live using ODB2. Due ...
Naftuli Kay's user avatar
7 votes
4 answers
5k views

Best solution for compact wiring on stripboard

When transferring a circuit from breadboard to stripboard, I often struggle to manage the wiring; often it starts looking like an overgrown garden; the components inevitably start disappearing under ...
Jodes's user avatar
  • 5,124
7 votes
2 answers
3k views

Power a circuit off USB the correct way

I'd like to properly power a gadget off USB (2.4A USB powerbank https://www.amazon.com/Anker-20100mAh-Portable-Charger-PowerCore/dp/B00X5RV14Y/ref=sr_1_3?ie=UTF8&qid=1512261941&sr=8-3) ...
iMrFelix's user avatar
  • 217
6 votes
3 answers
2k views

Design of an electronic device to disable remote access ability of contactless payment cards without visible alterations and damage to the card

Question: How could I build an electronic device which disabled the remote interaction functionality of contactless payment cards while not affecting the functions which are accessed via the on-card ...
sharptooth's user avatar
  • 12.5k
5 votes
2 answers
9k 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 ...
user55711's user avatar
  • 161
5 votes
2 answers
58k views

How do I splice multiple (more than two) wires in-line?

When I look at many wiring diagrams, like this one: (source), I see wires which need to be connected to multiple points. This suggests that the wire will require multiple three-way splices in ...
gcv's user avatar
  • 201
5 votes
4 answers
26k views

CAT5 for telephony

I wish to extend my incoming telephone connection using CAT5 as I've heard it could provide better performance than standard single stranded telephone wire over long distances. There are only two ...
userSteve's user avatar
  • 159
4 votes
3 answers
1k views

Extending LED length

Completely new to electronics, I've just begun to play with an Arduino. I was wondering, if I wanted to make an LED sculpture, what is the correct way to extend the legs of each LED so that they stand ...
McDonnellDean's user avatar
4 votes
5 answers
2k views

If ground and neutral are bonded at main panel, why aren't all grounded device chassis energized?

I know this is a question with variants that have been asked countless times on the internet and on this site. Believe me that I have scoured through these questions and answers in search for a ...
user2686410's user avatar
4 votes
1 answer
3k views

Help with custom motorbike tail lights

About a week ago, I have been soldering exactly 29 LEDs to a PCB in an effort to replace my old, custom taillight bulb that came with my motorbike since I bought it. I have successfully managed to ...
David's user avatar
  • 41
4 votes
2 answers
6k views

How do I tell sleeve from sleeve shunt on this connector?

I need to change a DC jack to a different one (with long bushing). I'm not to sure which terminal connector is what from the manufacturer's diagram. The DC jack is a L712A from Switchcraft (...
Ben's user avatar
  • 305
4 votes
1 answer
3k views

Reversing direction of a 115v ac motor using Arduino

I have a 115V brushed motor that I am controlling via Arduino. The manufacturer says it draws 1A but I'm not sure if that accounts for the initial current draw to turn it on. I've had great ease and ...
WAF's user avatar
  • 143
3 votes
1 answer
2k views

Wiring the Mean Well RT 125D

For some projects with the Raspberry PI 2, for which I require 5V+12+24V, I baught the Mean Well RT-125D I put the switch in order to have "230V" displayed, as in my Country, the voltage is 230V. I ...
J4N's user avatar
  • 129
3 votes
4 answers
4k views

How to connect 2mm surface mount component to 2.54mm breadboard

I have an RF link module with surface mount connectors 2mm apart. This is the datasheet. How would I connect this to a breadboard with 2.54mm spacing?
mchr's user avatar
  • 203