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[T3sl4co1l]

Code: [Select]

T3sl4co1l: based
W1ngs: emittered
T3sl4co1l: and collectorpilled


[I wanted a rude username]

[timenutgoblin]

Before:



After:

[DavidAlfa]

[EPAIII]

And that, ladies and germs, is why I majored in physics and not history.

Many people even with the textbook wouldn't pass a physics exam. Other matters are different, history for example, you don't have to understand a thing only memorize. But physics... if you don't understand it there's no way.

[EPAIII]

OMG! I have just got to build a watch like that.

REALLY! I want one! That says GEEK like the mother of all geeks! Best worn on formal, dress occasions.

And sneak in a cell phone chip with keypad dialing.

Meme credit: Rajesh Nayak. Watch by Jharwin Barrozo.

[MrMobodies]

I saw this Youtube documentary on Matt Hancock and when he grins like that he reminds me of this character on a cover from an old game I had over 30 years ago on the Atari STE:

[niconiconi]

"Mom, can we buy a Vector Network Analyzer?"

"No, we have a Vector Network Analyzer at home."

(the Vector Network Analyzer at home)

[T3sl4co1l]

The hell am I doing

[T3sl4co1l]

From irc.austnet.org #eevblog,



(For those that don't know,

)

[H713]

The best part is that it looks like a piece of zipcord.

[Ed.Kloonk]

The best part is that it looks like a piece of zipcord.

There's no excuse for not joining that up in the wall.

[AndyBeez]

A mains wire with two plugs at each end. What could possibily go wrong/kill the dog? That 6 inch nail worries me. Who uses the wrong fixings in the wrong way? Meet our highly skilled 'electrician'. I suspect his frustrated wife made the warning 'label'?

One for our networking fan boyz:

[rsjsouza]

The best part is that it looks like a piece of zipcord.

There's no excuse for not joining that up in the wall.

The kicker? The plugs are only two poles with no ground... Because you don't need no stinking ground on an exterior carport outlet, right? 

[Ed.Kloonk]

The best part is that it looks like a piece of zipcord.

There's no excuse for not joining that up in the wall.

The kicker? The plugs are only two poles with no ground... Because you don't need no stinking ground on an exterior carport outlet, right? 

Very possible that somewhere on the other end of that circuit there might be the 'tail' dangling where it got cut off. And is now live. And, as you say, not earthed either. Awesome.

[tom66]

The best part is that it looks like a piece of zipcord.

An old friend of mine somewhere has a power cable made up with two standard British plugs on each end.  The purpose of this, err, "contraption", is to be able to back-feed the entire house from a petrol generator in the event of a power outage.  He assures me he would never forget to isolate the grid connection before connecting this and he is very careful to disconnect it from the generator before the other end but, oh my, I hope his life insurance is up to date.

[rsjsouza]

To be honest, I would be much more concerned with the linemen that may be zapped by a generator trying to feed the entire neighbourhood.

In my house I have an interlock that forces the main breaker to be disengaged in order to engage the generator feed. Very simple mechanism but quite ingenious.

[Ed.Kloonk]

All jokes aside,
The generator would likely see practically a dead short. Depending on the circuit protection on the generator, or even the fuse that connects to the outlet, that may pop first. But a portable generator would really complain about being expected to liven up half a neighbourhood.

I'm not convinced that the voltage applied would be very high, without doing any math: you know, the number of houses connected verses the impedance of the alternator. Many more amps than what the fuses are rated along the way.

But yes, before anyone complains... Pretty dumb to do that when the are safer options. Please don't plug generators straight into your house power outlet. Ask somebody to install the right switch gear so you can do it safely.

To be honest, I would be much more concerned with the linemen that may be zapped by a generator trying to feed the entire neighbourhood.

Linesmen always treat all lines as live, always. The reason is the wires can become live unexpectedly for many reasons such as falling trees or even in case of miscommunication among repair crews.

A big danger would be connecting a running generator to live grid, not realizing it's live. Wouldn't like to be standing anywhere near the generator.

[eti]

(Attachment Link)

Bit awkward and cringey. It appears to imply that EEVblog is a worldwide known entity. Lol. Slightly cliquey.

[H713]

The best part is that it looks like a piece of zipcord.

An old friend of mine somewhere has a power cable made up with two standard British plugs on each end.  The purpose of this, err, "contraption", is to be able to back-feed the entire house from a petrol generator in the event of a power outage.  He assures me he would never forget to isolate the grid connection before connecting this and he is very careful to disconnect it from the generator before the other end but, oh my, I hope his life insurance is up to date.

My favorite examples are SpeakON/XLR/TRS to Edison connectors so that you can use a cheap extension cord instead of a speaker cable / microphone cable / line level cable. Yes, people do make them.

This is what happens when some cheapskate tries to do this, but then accidentally plugs the output of a power amplifier into a high-current mains receptacle. At least, that's the only possible explanation I can give for what happened to this poor thing.

[Nominal Animal]

Hmm, I've lost the image of the Bastard Operator from Hell Ethernet-to-Mains cable I used to have.

(No, I'm not telling you whether I had the image, or the actual cable.  None of your business.)

[Ranayna]

Hmm, I've lost the image of the Bastard Operator from Hell Ethernet-to-Mains cable I used to have.

You sureley mean the Etherkiller, or some variation thereof
https://etherkiller.org/

Google image search "etherkiller" is scary... And just for fun it throws in audiophool power cables as well.

[Ranayna]

They are.
But put mains up their asses, and these tiny little transformers will not isolate anymore
At least not in 240 Volt countries :p

[AndyBeez]

Hmm, I've lost the image of the Bastard Operator from Hell Ethernet-to-Mains cable I used to have.

(No, I'm not telling you whether I had the image, or the actual cable.  None of your business.)

You mean 802.3v Mains Power Over Ethernet (MPoE).

Cat6 32awg cores carry roughly what current? I have no idea and are just too lazy to use Google, but as Trump says, the current carrying capacity, "is going to be massive."
[ you can do the REAL math if you want ] Two mains isolation transformers at each end and viola, MPoE. Earth leakage not included.

Dumb idea? MPoE must be a lot more practical than that mains power over WIFI thing from last year?

[Berni]

I thought ethernet NICs were isolated using an isolation transformer.

Exactly, but you can connect 220V mains across the windings of that isolation transformer.

Tho considering the transformers are designed to operate into the MHz at low signal levels, i don't think all that much of the 50Hz would make it across to kill the ethernet chip. Even then the ethernet PHY tends to be a separate IC, so the computer would likely still boot just fine with it dead. But in any case the ethernet port would no longer work because that isolation transformer would quickly get blown up by the massive amount of current flowing trough its windings. Possibly if it blows up spectacularly enough the hot plasma might let mains voltage jump the gap and do some more serious damage. The POE feature is another way to guide it across the gap with enough power to blow an entire machine, but computers never have that.

The other way is to exceed the isolation voltage and jump the gap across the transformer, but 220V won't do that. This takes into the kV range and it is how lightning tends to kill computers via Ethernet.