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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35
votes
3answers
68k 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?
44
votes
5answers
47k 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 ...
13
votes
3answers
1k 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 ...
9
votes
1answer
60k 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 ...
0
votes
4answers
499 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 ...
46
votes
2answers
623k 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?
3
votes
3answers
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: ...
27
votes
10answers
22k 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 ...
10
votes
3answers
14k 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 ...
10
votes
1answer
3k 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?
39
votes
6answers
10k 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 ...
15
votes
3answers
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 ...
15
votes
3answers
31k 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 ...
14
votes
4answers
12k 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 ...
8
votes
4answers
3k 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 ...
4
votes
2answers
655 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 ...
-1
votes
2answers
754 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/...
10
votes
3answers
978 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 ...
3
votes
3answers
1k 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 ...
1
vote
1answer
474 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 ...
1
vote
2answers
2k 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 ...
0
votes
2answers
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 ...
0
votes
1answer
766 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 ...
0
votes
1answer
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 ...
20
votes
6answers
13k 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 ...
19
votes
9answers
89k 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? ...
12
votes
7answers
6k 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 ...
12
votes
6answers
23k 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 ...
7
votes
4answers
4k 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 ...
11
votes
5answers
2k 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. ...
11
votes
4answers
5k 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 ...
7
votes
3answers
22k 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 ...
6
votes
3answers
1k 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 ...
5
votes
2answers
2k 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) ...
2
votes
2answers
643 views

switch on a long wire end causing microcontroller to shutdown

i've a push button connected to micro-controller using a 100m 18ga wire that cause the micro-controller to shutdown after few times of working properly the circuit is fully functional with a short ...
14
votes
3answers
20k 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. ...
5
votes
2answers
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 ...
3
votes
6answers
10k views

Why is it not advisable to fuse the neutral

I have been doing some research on this question. The answer I get most of the time is that this is for safety reasons. That there can be no current in the neutral that didn't come from the live. If ...
3
votes
1answer
3k views

wiring AC switch with DC led

This is a follow up to a previous question I had answered. I'd like to show the following diagram. Here, I have laid out (crudely) a diagram that has 120v-110vAC from the wall going to a push button ...
2
votes
4answers
1k views

Programmable point to point connections

I have an idea for a programmable breadboard, but I am not sure of the feasability of it. My thought is to connect each strip of a breadboard to some type of circuit that can make arbitrary ...
2
votes
2answers
2k views

Daisy chain (parallel) of IR sensors

I've got 5 little Sharp IR sensors I need to wire to an Arduino. These are the sensors: https://www.sparkfun.com/products/242 Trouble is, I need to put the connections in a relatively small area. ...
1
vote
2answers
456 views

Several Questions About Analog Input

I am new in the automation industry, and now I am focusing on learning how to wire correctly analog inputs in detail, since last time I tried I damaged the module input because of wrong wiring. Here ...
1
vote
1answer
1k views

Using pot as variable resistor: should wiper be connected to spare end terminal?

I've heard somewhere that a rheostat uses two pins while a potentiometer uses three. But still, the thing i would like to know is if there's anything different with the adjustment if I wire the pots ...
0
votes
2answers
555 views

Ground, common, and Earth ground confusion

I am learning on transmitters and input modules nowadays. But the usage of word 'ground' is confusing me. What does 'ground' mean there (earth or power supply common)? If it is earth ground, why we ...
5
votes
4answers
12k 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 ...
4
votes
1answer
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 ...
4
votes
1answer
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 ...
4
votes
2answers
51k 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 ...
4
votes
2answers
5k 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 (...
4
votes
5answers
490 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 ...