Questions tagged [plug]

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38 votes
8 answers
3k views

Add a passive hardware token using a 3.5mm jack

I have a box that I made for my niece, which allows her to exchange voice messages with me. It is powered by a Raspberry Pi and features two buttons, a LED, a microphone and a speaker. Now, for ...
Besi's user avatar
  • 727
17 votes
3 answers
2k views

What type of plug is this?

I'm seeking to buy this type of plug but can't find it anywhere. I tried asking at my local electronics shops, googled the images and consulted the data sheet of the appliance it came with. (12V input ...
Jen's user avatar
  • 275
15 votes
5 answers
2k views

Why do we still use cable for a lot of forms of data transmission?

Like many people I'm often annoyed by ugly cable clutter, especially when it's long distance. In my opinion it would be ideal if cables could be eliminated altogether, so that you'd just have two ...
user avatar
12 votes
4 answers
2k views

Mains Plug Soldering Wires

So I have a few extension leads all are 13A rated but the cable length is too short just 1 metre. It would be cheaper for me to rewire them than buying new extension leads. I bought a reel of the ...
Dave1UK's user avatar
  • 265
11 votes
3 answers
17k views

Are Micro A USB plugs actually ever used?

Wikipedia states: An OTG product must have a single Micro-AB receptacle and no other USB receptacles. An OTG cable has a micro-A plug on one end, and a Micro-B plug on the other end Micro-A is ...
Timmmm's user avatar
  • 1,173
10 votes
2 answers
13k views

Are countries that use 2-pin plugs less safe than countries that use 3-pin plugs given that the earth is missing?

Will there be occasions when using 2-pin plugs is safer than 3-pin plugs? Is it accurate to say that 3-pin plugs are always safer given the presence of earth?
user768421's user avatar
  • 1,207
10 votes
1 answer
16k views

Why is earth pin absent in phone chargers plugs but present in laptop ac plugs?

Both mobile phones and laptop get dc voltage from ac source for charging.These chargers have transformer for isolation and rectifier + filter if i am not wrong.I guess the amount of output dc and ...
Gopi's user avatar
  • 333
9 votes
2 answers
19k views

Why do some power plugs have holes in them? [duplicate]

I've just learned that electrical chargers with pins with holes in them are illegal in Australia. Here's what I'm talking about (ignore the one second from the left): What's the purpose of these ...
Matt Lyons-Wood's user avatar
9 votes
4 answers
2k views

What are those plugs called, and who is the manufacturer?

These are called "Zwerg-Stecker" and "Zwerg-Kupplung" respectively in German, but I've never seen them anywhere else. It basically translates to "dwarf plug" and "...
polemon's user avatar
  • 1,097
8 votes
5 answers
23k views

Why do EU electrical sockets/plugs have two pins for grounding?

Inside a plug there is one grounding wire, while the socket has two grounding pins. I know that the wire splits into two, but why? As the wiring inside the wall is supposed to be the same between ...
appwizcpl's user avatar
  • 921
8 votes
1 answer
2k views

Do TRS connectors short adjacent contacts during insertion?

I would imagine with everything wiping past each other during insertion, that the following can happen briefly: ...
Rob Starling's user avatar
7 votes
6 answers
15k views

How to solder wires on to this power barrel plug?

I got this power barrel plug. http://www.digikey.ca/product-detail/en/PP3-002A/CP3-1000-ND/992136 It doesn't have any hole for me to put a wire through. The wire just goes into the hole for ...
tuzzer's user avatar
  • 269
7 votes
3 answers
37k views

Does it matter which way you plug stuff into the wall socket [closed]

I have a european socket and if you saw one you will know that you can plug stuff either way. But american sockets can only be plugged in only one way. So does it matter which way its plugged it ...
theraginggamer's user avatar
7 votes
5 answers
16k views

Aren't non-polarized plugs a little dangerous? Why still use them?

Sorry if there is an answer for this kind of question somewhere. I can't find it anywhere. Take a look at obvious toaster example: If you live in Europe and have non-polarized plug and a toaster (a ...
user avatar
6 votes
4 answers
16k views

Would 5.5 x 2.1 mm male plug work inside a 5.5 x 2.5 mm female jack for DC power?

General Question I am wondering, is it possible to use a 5.5 x 2.1 mm male plug inside a 5.5 x 2.5 mm jack for transferring 12 Vdc? My thoughts are just that it may just be a tight fit on the inner ...
Intrastellar Explorer's user avatar
6 votes
2 answers
587 views

What is the name of this green 2-pole DC power connector?

I've seen this connector crop up on several devices: (The above image is from a StarTech USB HUB.) If I want to buy the matching plug for this socket, what should I be searching for? I've tried ...
larsks's user avatar
  • 354
5 votes
3 answers
70k views

How do I identify which point is Live and which point is Neutral of a 2-pin plug?

I have a 2-pin plug that was not label which is Live and which is Neutral. I do not want to damage the electrical device and was wondering what should I do in order to test and find which point is ...
Jack's user avatar
  • 251
5 votes
2 answers
4k views

Why is the upper hole in a plug point bigger than the rest?

In a plug point you can see that the upper hole is bigger than the other holes in it. Why is this hole bigger than the other two?
Brd's user avatar
  • 111
5 votes
1 answer
2k views

Is it safe to swap positive and negative on a barrel plug?

I have just enough knowledge about electrical stuff to get in trouble... So that is my background, and hence why I am asking before I do something stupid. I have a device I want to power that is ...
Adam Lathrop's user avatar
5 votes
2 answers
1k views

What is the name/type of this DC power connector?

I would like to know the name/type of this connector: It provides 12 DC power to a hand drill, its diameter is about 2.5mm. I would like to buy an adapter for it that converts it to a 4mm banana plug ...
Imre Deák's user avatar
5 votes
1 answer
228 views

Turning on electric devices by plugging them in rather than pressing their on/off button

Weird question, I hope it has its place here: is it true that electric devices like washing machines, computer and so on, should be (1) plugged in, and then (2) turned on, rather than the contrary? ...
drake035's user avatar
  • 151
5 votes
4 answers
3k views

What is a single socket to ground-only plug adapter for electrical outlets called?

A three-prong to two-prong adapter is also known as "AC ground lifter" or "cheater plug". What is a single socket to ground-only plug adapter for electrical outlets called? It's a single socket ...
CodeBricks's user avatar
4 votes
6 answers
842 views

Recommended mounting hole for coaxial plugs

I want to design a custom mounting plate for the following two plugs: https://uk.rs-online.com/web/p/coaxial-adapters/2478739 https://uk.rs-online.com/web/p/coaxial-connectors/8859960 Now I want to ...
Physics Student's user avatar
4 votes
4 answers
1k views

Stranded wire was cut... Connecting it back together, with solid wire... Is this safe and possible? [closed]

I have this connector for a monitor and the wires were cut. So now I’m trying to put them back together with electrical tape. I stripped the stranded wires and connected it to a short solid wire, ...
Jhon Psul Jaspe's user avatar
4 votes
4 answers
563 views

Preventing spikes when plugging jacks

I'm using an 8 output DAC (LTC2666) to control synthesizers via mono 3.5mm jack connections. It works fine most of the time but every once in a while, plugging in a jack into the synthesizer will ...
schmop's user avatar
  • 125
4 votes
2 answers
417 views

Why does this UK mains plug have a gap going down the live pin?

What is the purpose of the gap on the live pin of this plug? I've never seen this before and was why this gap was their since the plug is only for an alarm clock. The gap goes down the middle of the ...
bob1252's user avatar
  • 69
4 votes
3 answers
3k views

How to correctly connect audio plug to LM386?

I'm working on my first circuit which includes LM386 chip and some music. Since I don't have a lot of experience with electronics I need a little help with audio plug. It's the same as that: I know ...
user1257255's user avatar
4 votes
3 answers
11k views

Why AC socket polarity is important?

In North America sockets and plugs design makes sure you'll be able to plug only in a certain way: (source) Why is this important for AC? Moreover, many plugs, such as cellphone chargers, are in fact ...
Sparkler's user avatar
  • 823
4 votes
2 answers
808 views

What is the purpose of the 1 Mega-ohm 1/2 watt resistor between neutral and ground, in a vintage audio amplifier (SONY model STR-7800SD)

I own an old SONY radio / amplifier, model STR-7800SD. I opened it and I saw a resistor between one of the AC lines and the chassis. The funny thing is that it has a REVERSIBLE 2-prong plug! So, I ...
SimplyTech's user avatar
4 votes
2 answers
6k views

Using an AC plug for DC current

If I have a plug that is rated 10A @ 250V AC, is it safe to assume I can use it at 10A @ 12V DC? Could it be used at higher current or should its maximum be lower for that matter? Thanks!
Ostrichmeat's user avatar
4 votes
1 answer
105 views

Vintage dual 0.25 inch plug connector - Does this have a name or a typical use case?

I found several of this type of connector in an estate, and just wondering if anyone knows if this type of connector has a particular name, or what they are typically used for. The writing says "...
pyridoxal_trigeminus's user avatar
4 votes
0 answers
41 views

Help Identifying a Molex/MATE-N-LOCK style connector

Hoping someone can help as I've spent the last few hours trying to find this specific connector on a number of distribution and manufacturer sites. The pitch looks like it is around 6.3mm. It's a 2x2 ...
C-BoT-AU's user avatar
4 votes
2 answers
3k views

3.5mm PCB mount male plug [closed]

I'm looking for a male 3.5mm audio plug (3 or 4 band) that can be mounted directly to a PCB. Both surface mount and through hole are fine. I'm surprised that all the usual suspects (Digikey, Farnell, ...
Antti's user avatar
  • 483
3 votes
3 answers
30k views

How did I survive a short hand-to-hand 230V shock? [closed]

About 5-10 years ago (can't remember when exactly), my father asked me to unplug a lawn mower from an ungrounded power outlet with no sunken part (the kind which had been outlawed by the EU for a few ...
Nzall's user avatar
  • 340
3 votes
1 answer
654 views

Help with identifying a PCB header connector

I have scoured the Internet trying to locate what this is - I'd appreciate any information if someone recognizes this plug/socket combination. It is currently used to carry 5V DC power of about 1A. ...
Crom's user avatar
  • 33
3 votes
2 answers
1k views

Actual/theoretical benefits of round or flat outlet prongs

What might be the reasoning for European connectors having rounded prongs while USA and UK connectors are primarily flat pronged? Please correct any mis-tagging.
Hawken's user avatar
  • 131
3 votes
2 answers
8k views

IEC vs. UL current rating

I was doing a search on Digikey for some power entry connectors and noticed that many of the connectors are rated 10A by IEC standards and 15A by UL standards. Why is there such a large difference ...
pr871's user avatar
  • 1,167
3 votes
1 answer
159 views

What battery connector type is this?

Just spent a long time on the JST site and the Molex site trying to identify the following connector. It's got 2mm pitch and is used for a battery connector in a small RC quadcopter. I found them on ...
Marcel Stör's user avatar
3 votes
1 answer
2k views

Socket wiring to relay + Ardunio / Pi

I’m working on a personal project at the moment and needed a small amount of electronics help. What I am building is a RaspberryPi/Arduino connected to wall plugs (which is not being fitted to the ...
adambutler's user avatar
3 votes
2 answers
78 views

What Molex plug is this? 5 mm pitch, 3 way, 1 row

I'm trying to identify this plug, it might be a different brand instead of Molex. The pitch is 5mm between each hole on the plug, 3 way, 1 row. This plug is 3-way but only has two terminals in, so the ...
Joe B's user avatar
  • 31
3 votes
2 answers
386 views

Removing 3.5 mm jack socket from a PCB: patching the socket's switches

I sheared off a plug from a 3.5 mm headphone jack inside my Roland HP603 piano. After failing to remove the plug, I tried removing the 3.5 mm jack socket from the PCB. However, the piano still thinks ...
pyrex's user avatar
  • 131
3 votes
1 answer
131 views

What is this connector/plug called?

I have found this cable several months ago with old electronics (it is more than 5 years old, I'm sure.) For more than a week, I have been looking for the type of plug shown in the photos on internet ...
marek_l's user avatar
  • 33
3 votes
1 answer
878 views

What is the purpose of these plastic "wings" on this power plug

The plug in the picture has plastic "wings", which seem to have no other purpose than to irritate when trying to insert multiple devices into a power board. The wings do not allow cords to be plugged ...
Bob23's user avatar
  • 31
3 votes
2 answers
946 views

Identifying a round connector with four pins and screwable housing

This cable was in use carrying both power and data to a simple push-button panel previously. It has three small and one big female pin. Close-up photo of the front, with logo.
techjwalker's user avatar
3 votes
0 answers
354 views

Offical Name of Dell/HP Common Laptop Power Jack/Plug [duplicate]

I have seen this question asked before, but never has it gotten a real answer. With the popularity of this plug I find it hard to believe it does not have a standard name or IEC name. Does anyone ...
MadHatter's user avatar
  • 3,526
2 votes
2 answers
700 views

What type of connector it is?

Can anyone identify this connector type? It sticks out of my wall near television area. I suspect it may be some kind of antenna connection, but I'm not sure. Could not find it in any of the antenna ...
Pol's user avatar
  • 181
2 votes
3 answers
355 views

Why are plug tops rated 16A and not 17, 18 or 19A?

In South Africa, most plug tops are unfused and are rated 16A. I would like to know how they determine what current value they'll rate a plug, and what factors influence how they rate a plug when ...
Ph3ng's user avatar
  • 337
2 votes
3 answers
1k views

Earth pin in a 3-pin mains plug [closed]

I bought a new pressure washer online and it has a 3-pin plug as shown in the picture, but there are only two pins protruding out from it. The two pins fit into my standard 3-pin socket and it works ...
androidguy's user avatar
2 votes
1 answer
202 views

What is the IEC standard number for this plug?

I need the specific IEC standard number for a power plug/socket used in a laptop. See the photo below. I need to know the laptop-side plug (the lower plug in the photo). Thanks. This plug is used in ...
Larry K's user avatar
  • 257
2 votes
1 answer
143 views

What is this cable/device?

I hope I'm on the appropriate site. Does anyone know what this thing is? It has a mini mono plug. The white square is slippery..but it is not covering double-sided tape. A white LED did not light up ...
Steve Wellens's user avatar

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