Character has to diffuse a bomb

>character has to diffuse a bomb
>there's a red and blue wire

>"CUT THE RED WIRE!"
>implying the bomb builder would use standard color coding in his wires and not make up his own system

How did the meme begin?
Do bombs actually have a red and blue wire?

they do.
for you.

Of course, all bombs are manufactured by international standards so they can be defused on locale

mate you do not want to fuck with the trade union of bomb makers when it comes to standards and practices

most simple hardware components are constructed with red wire being positive voltage and black being ground. if the wire is not red or black it should be some form of signal.

then of course if you make a bomb you probably don't want anyone to be able to defuse it. nothing prevents you from picking whatever color of wires you like.

>"Cut the blue wire"
>character is about to cut it
>"No! No! Cut the red one!"

Why don't they try to figure out which wire is an Opener and which a Closer. You sure as hell don't cut the Opener.

>it's an OP learns about bomb making on Google episode

Yes but why does cutting one wire make it blow up

I most like it when the drama happens around a bomb made of c4 or similar where you can safely disarm it just by removing the detonators.

Because it could have a dead-hand trigger. When you cut the wrong one you basically trigger it though it's not as simple as that because shit would blow up in your face by accident if it ever got lose.

Then why would cutting the right one not blow it up?

Because

I'm more like a 3 wire guy.

that red thing will blow in your face one day

I want to lick it

the bomb could be triggered by one wiring delivering a logical 0 (ground), and it's expected to get a logical 1 (~5 V) constantly for as long as it's supposed to not blow. cutting the power or that peculiar wire should detonate the bomb. it could also be the other way around, then cutting the power should be ok.

i have education in hardware and system construction so i'm coming from that but i'm not familiar with how common bombs are produced.

It's an "unwritten rule" among bombers to use the same coloring.

But what if the person that is making the bomb forgets what each wire does?

Dont you need a circuit though? Wouldnt cutting either wire break the circuit?

i'm not familiar with detonators but surely you can test the behaviour of the state machine/micro controller/whatever you have to set off your bomb without having to use actual explosives.

if you cut a ground or a positive wire, components will malfunction. that doesn't mean the entire system goes down, just a subset of it's functionality.

if you cut a signal wire a potentially smaller subset of the functionality will go down.

it's extremely hard to just look at wiring and figure out what a system does. if it's just combinatorial circuits, it's possible, but if it's a microcontroller you can't, since you don't have the code running on the microcontroller. my best guess is that bomb technicians are successfull because the bombs people make are similar.

red is hot and blue is cold, if you cut off the hot to the bomb, it doesn't have enough heat to explode

Is there anyway I can learn more about defusing?

I don't want to be on a watchlist or anything, I'm just paranoid about getting on a plane with hajeeb one day and his son's home-built suitcase clock has a count down timer.

Not sure if I'm being trolled but this seems like it makes sense

probably would be better off throwing it out of the plane than attempting to defuse it

I would have to defuse it before throwing it off the plane.

Why would a man defuse it before throwing it out of a plane?