5h 3d print lmao

in 10th grade we had mandatory health class where we learned about how eggs were fertilized. we had to do a project showing we knew the process and label the parts.
i made a flipbook demonstrating it. The teacher confiscated it and told me it was pornography. i got an A

@coolbean only the electronics are gonna be model f-ish. It will not even have springs as per my current plan

@coolbean @wire_witch the foam is fine? Nicee

@coolbean also gonna try ripping off model f pcb design ig. If ir works it works

@coolbean oh yeah. I learned that people have made open source replacements for the model f electronics, so now i have something i could base a custom capacitive keyboard on

@coolbean been a while since i've ssen an actual ps2 port

Hotend handles even 150mm^3/s fine lmao

@cine @whirly so, you know how diamonds and graphite are just different crystal structures for carbon? Steels can do that better
Iron and simple low carbon steels are just ferrite crystals and turn into austenite at higher temperatures. Austenite is a non magnetic crystal that is more elastic, very corrosion resistant and i think also harder, it also dissolves carbon better, we use a bunch of different metals to keep the crystals as austenite at lower temperatures, mostly nickel.
Then there's also i think cementite which isn't even a metal alloy, it's a metal ceramic and the proper name would be iron carbide. It's hard and also helps with elasticity somehow? Spring steel is here afaik. Basically the original steels all had a bunch of that in them iirc. You get it by just putting too much iron to dissolve in the ferrite crystals, but the fun part is actually high carbon steels that have way too much carbon. You can quench them and get martensite which is again mostly ferrite with cementite but also carbon stuck in ferrite, causing a bunch of weirdness causing it to become stupid hard, at this point austenite is actually what's making your steel soft and if you go overboard with the carbon content crystals get stuck as austenite unless you cool everything down further with like liquid nitrogen.

Uhh, just some stuff from the top of my head, can't promise everything's correct

@VD15 @lain @dielan

The fact we call all of this stuff steel just shows how long we've been using it

Feliz Jueves

Even more Epstein-related arrests outside the US without the US having done a single one lmao.

@whirly no, just a thought after reading austenitic steel (steel is stupid complex, lemme infodump about austenite, ferrite, martensite, perlite, cementite... A bunch of those aren't even just metals anymore but metal-ceramic composites)

Autistic steel

@StaleDonut

Need
To
Hold
Back

Static CMOS logic is so ridiculously elegant and pretty it feels like the universe is showing you a giant neon sign saying "THIS. BUILD THIS WAY" but then the asymmetries between NMOS and PMOS devices sneak up on you while you're not looking and dunk your head in the toilet

@coolbean robot companies shaking in their boots rn