this post was submitted on 02 Feb 2026
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Science Memes

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Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.



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[–] xthexder@l.sw0.com 14 points 5 hours ago (2 children)

Most circuit diagrams do not draw current flowing in any direction at all. It's just labeled + and -. I don't see anything wrong with this.

[–] deHaga@feddit.uk 2 points 4 hours ago (2 children)

Logically the switch comes before the bulb.

[–] BartyDeCanter@lemmy.sdf.org 4 points 2 hours ago

That depends, do you want high or a low side switch? There are valid reasons for either depending on what you’re doing.

[–] Johanno@feddit.org 7 points 4 hours ago

But the current doesn't care

[–] deHaga@feddit.uk 1 points 4 hours ago

The switch comes before the bulb

[–] nomen_dubium@startrek.website 5 points 7 hours ago

feels like this should be a skeletor quote!

[–] bleistift2@sopuli.xyz 225 points 1 day ago* (last edited 1 day ago) (4 children)
[–] explodicle@sh.itjust.works 6 points 7 hours ago

IMHO Franklin is one of the few who would go straight to "what is it?" without blinking.

[–] howrar@lemmy.ca 56 points 22 hours ago (2 children)

Turns out Benjamin Franklin had it right, and it was this time traveler that caused him to flip it to the wrong direction.

[–] NeatNit@discuss.tchncs.de 13 points 12 hours ago

While funny, this doesn't work because the time traveler told him specifically which one is negative.

[–] OpenStars@piefed.social 13 points 18 hours ago

Damn time travelers, ~~always~~ ~~never~~ messing things up!

[–] SLVRDRGN@lemmy.world 17 points 23 hours ago

Man, this one is a good one.

[–] orbitz@lemmy.ca 7 points 22 hours ago (1 children)

Always love their comics but since I don't know crap about this stuff it's amusing to see how this one is relevant to a meme. Wish I knew more but only so much I've learned so far. One day perhaps but not today.

[–] helpImTrappedOnline@lemmy.world 23 points 22 hours ago* (last edited 11 hours ago) (1 children)

https://www.explainxkcd.com/wiki/index.php/Main_Page

The contributors on this site do an excellent job explaining the comics. Not really ELI5, but more ELI15.

It's okay to not understand every comic, someone else out there figured it out and explained it to us.

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[–] j4yc33@piefed.social 12 points 18 hours ago

OMG-O-S-H every circuit designed with conventional current just exploded because of your revelation here.

/s

My friend, this is the same branch of science that got us to space with calculations assuming spherical cows.

[–] bandwidthcrisis@lemmy.world 11 points 17 hours ago (2 children)

While we're at it, is a compass needle's North pole actually a South so that it points North? Or is the Earth's North pole actually South so that the needle's North pole points to it?

(I know that I could look this up, I just want to confuse people.)

[–] Siethron@lemmy.world 2 points 8 hours ago

We decided on North long before we discovered magnetism. But the magnet poles of the earth flip from time to time so ehhh.

[–] mexicancartel@lemmy.dbzer0.com 12 points 16 hours ago

But that's by design, while this is a convention problem

[–] ThomasWilliams@lemmy.world 41 points 1 day ago (4 children)

The current does flow from positive to negative. Electricity is not the flow of electrons - they just generate the field that the electric wave flows through. The electrons don't actually move very far. The wave flows outside of the wire, not in it.

[–] umt@lemmynsfw.com 4 points 22 hours ago
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[–] Console_Modder@sh.itjust.works 78 points 1 day ago (5 children)

You just have to ignore the existence of electron flow. Conventional current flow is all that matters, and the only people who use electron flow are those who design integrated circuits and lunatics

[–] BartyDeCanter@lemmy.sdf.org 1 points 2 hours ago

Are you implying there there are IC designers who aren’t lunatics?

[–] ch00f@lemmy.world 63 points 1 day ago (3 children)

You forgot science enthusiasts who are desperately trying to impress people.

[–] Console_Modder@sh.itjust.works 78 points 1 day ago (1 children)

They get lumped in with the lunatics

[–] RizzRustbolt@lemmy.world 19 points 1 day ago

We don't want 'em.

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[–] JasonDJ@lemmy.zip 15 points 22 hours ago (1 children)

You mean to tell me that there are people out there whose job it is to design lunatics?

That's fucking awesome. Like a real-life comic book author.

[–] Track_Shovel@slrpnk.net 7 points 21 hours ago

Let's eat grandma

[–] MuskyMelon@lemmy.world 0 points 11 hours ago

You just have to ignore the existence of electron flow.

And ignore magnetic fields completely?

[–] ThePyroPython@lemmy.world 9 points 1 day ago (1 children)

It's also useful to think of the "ground" plane as a sort of well of potential charger carriers that the conventional current model overlooks. Aside from simultaneously visualising what's happening inside simple ICs like BJTs / MOSFETs and the circuit diagrams I've found it a useful way for checking for common mode noise in circuit and PCB design.

I guess this makes me a lunatic? Don't know until we test it;

Someone give me an ~~asylum~~ makerspace to takeover!

[–] JasonDJ@lemmy.zip 3 points 11 hours ago

It's also useful to think of the "ground" plane as a sort of well of potential charger carriers

I...think I understand ground loops (audio) now.

[–] TheRealKuni@piefed.social 51 points 1 day ago (3 children)

And that’s why we have positrons instead of the much-cooler-sounding negatrons.

[–] MajorMajormajormajor@lemmy.ca 39 points 1 day ago (3 children)

Man, they have positrons and negatrons now? The Transformers franchise is wild.

[–] Assassassin@lemmy.dbzer0.com 16 points 1 day ago (1 children)

We gotta keep them out of sports, they are too strong.

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[–] morto@piefed.social 44 points 1 day ago

"all models are wrong, but some are useful"

[–] Fedizen@lemmy.world 16 points 1 day ago (2 children)

Couldn't you fix this by also defining electrons as positive? Imo the physicists and electrical engineers should fight it out.

[–] veroxii@aussie.zone 3 points 18 hours ago

All words are just made up.

[–] Console_Modder@sh.itjust.works 6 points 23 hours ago (1 children)

The physicists are absolutely right. However, I reject their reality and substitute my own

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[–] _druid@sh.itjust.works 24 points 1 day ago (1 children)

But then I get to talk about all those holes flowing.

[–] Lost_My_Mind@lemmy.world 14 points 1 day ago (2 children)

Uhhhh......pornhub is that way ----->

[–] Bronzebeard@lemmy.zip 1 points 11 hours ago

I'm sure someone has uploaded some current diagrams...

[–] _druid@sh.itjust.works 14 points 1 day ago (2 children)

Wait, no, but first, imagine marbles in a straw!

[–] takeda@lemmy.dbzer0.com 14 points 1 day ago (1 children)

Pornhub is that way ----->

[–] SkunkWorkz@lemmy.world 9 points 1 day ago

Imagine a chain getting tugged back and forth

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