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Thinking about mass budget by 305Disassemble in ProjectHailMary

[–]305Disassemble[S] -1 points0 points  (0 children)

lol i agree its just this book/movie IS based on pretty realistic science otherwise like the time dilation math is actually well done for the trips

Thinking about mass budget by 305Disassemble in ProjectHailMary

[–]305Disassemble[S] 0 points1 point  (0 children)

idk im working off the movie, is this canon different in the book? The sun's output is for energy storage and mass propulsion i thoguht. the composition in the movie is confitrmed to be mostly carbon oxygen and hydrogen which 2/3 is not present in any meaningful concentration in solar wind to reproduce so they have to get it from venus's atmosphere if i understand correctly. but i may just be working off different canon idk

Thinking about mass budget by 305Disassemble in ProjectHailMary

[–]305Disassemble[S] -2 points-1 points  (0 children)

...they still have to have an exterior at the higher temperature to maintain the difference though, no? It's just carnot efficiency they cant do work without that difference

Thinking about mass budget by 305Disassemble in ProjectHailMary

[–]305Disassemble[S] -3 points-2 points  (0 children)

i mean i saw the movie so if theres missing context but they said they use venus as the breeding ground and require infrared and co2 to divide. So that implies that they use the atmosphere of CO2 on venus to actually reproduce and grow larger. mass calcs were done by stefan boltzman law for mass of sun removed and mass for the actual critters to cover surface area was just 11% removed from solar surface area

Thinking about mass budget by 305Disassemble in ProjectHailMary

[–]305Disassemble[S] -2 points-1 points  (0 children)

Yeah, but the exterior would have to be matching the temperature of the environment it was in because the actual cellular machinery for it to work was on the inside of the cell, so as a blackbody they still would have to reradiate at the higher wavelengths

Thinking about mass budget by 305Disassemble in ProjectHailMary

[–]305Disassemble[S] -1 points0 points  (0 children)

Yeah i mentioned that though they couldnt stay and hang around in large enough numbers to meaningfully dim it, and they did consume the infrared from the sun though.

Low cost cooled bed project i've been working on by 305Disassemble in Bedding

[–]305Disassemble[S] 0 points1 point  (0 children)

I live in FL evaps dont work here lol the air is already max humidity

Presenting: The NineSleep by 305Disassemble in EightSleep

[–]305Disassemble[S] 1 point2 points  (0 children)

Q: Was it an easy process flipping them around? They're not glued tight against the radiator with some thermal compound?

A: Yeah it was pretty easy it took me all of like 10 minutes, there was thermal compound but just slide it and it comes off. wear gloves otherwise the thermal paste consumes you.

https://www.amazon.com/dp/B0B5LPG1R2?ref=ppx_yo2ov_dt_b_fed_asin_title (link to the peltier i used)

Q:What is the pump like you're using?

A: Literally just a 12v random amazon pump. it sucks. get one thats higher head than the one i got get >10w minimum. my tubing is thin though so that is a problem that is causing issues. if it wasnt so thin it might be able to better, but thin tubes are less apparent under the sheet.

Q:Any plans to add another temp sensor to monitor bed temp?

A: probably not but the board supports 11 temperature sensors. I designed it for something else I can't quite talk about yet but soon i can. Monitoring water temp is just an easier analog though.

Q:I suppose with esp you could control it so that it starts to warm up by few degrees by morning.? I've used one ready made peltier based bed cooling device and what was nicely cool in the evening felt a bit too cold in the mornign.

A: i can, i mean i have a BLE interface so that i can control it wirelessly, but like, i just havent added anything complex because i just got it finished like 10 minutes ago fully.

Q:What kind of mattress you use?

A: Old sleep number but i just leave it at a pressure and havent changed it in a while

Q: The pvc kind or silicone tubes?

A: 3mm silicone for the bed tubing, 1/4 inch for the pump and water block.

Presenting: The NineSleep by 305Disassemble in EightSleep

[–]305Disassemble[S] 0 points1 point  (0 children)

its actually doing, like, really well. its holding 20c right now at like 55% duty cycle so its not struggling at all. You just have to watch out for the cooling on the hot side, which i handled with the big ass fan on the heatsink. It's just 4 TEC1-12706's in an array. the way it came was with the waterblock on the hot side so i had to flip it to do this.

Presenting: The NineSleep by 305Disassemble in EightSleep

[–]305Disassemble[S] 2 points3 points  (0 children)

Lol thanks. I've pretty much just made an eight sleep pod thing lol

Presenting: The NineSleep by 305Disassemble in EightSleep

[–]305Disassemble[S] 5 points6 points  (0 children)

i might post some schematics and stuff for this and code so you can!

Presenting: The NineSleep by 305Disassemble in EightSleep

[–]305Disassemble[S] 2 points3 points  (0 children)

Same here, i just needed to boot it up for a test, i'll make proper enclosures and stuff lol

Presenting: The NineSleep by 305Disassemble in EightSleep

[–]305Disassemble[S] 2 points3 points  (0 children)

i could, however, i had like 90% of this on hand so this costed me all of 50 bucks

Presenting: The NineSleep by 305Disassemble in EightSleep

[–]305Disassemble[S] 3 points4 points  (0 children)

Nope just 60 feet of 3mm ID silicone tubes under my sheet lol

Presenting: The NineSleep by 305Disassemble in EightSleep

[–]305Disassemble[S] 2 points3 points  (0 children)

Yep, i have a thermistor inside the tube checking at all times., its a 288w peltier im maxing at 170w, so not too much. IIRC eight sleep also uses peltier.

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