serpretetsky's latest activity

nevermind. you're right, we can just disagree here. I dont see this going anywhere.

So then you agree previous designs were also failures? We have multiple samples of failures of the pcie 2x8 connector. Im confident at least a few of those, if you did failure analysis, would show some of the pins had poor contact resistance...

Actual failure rates. If we dont have that guessing at them is not helpful.

This is pretty much all you had to say, and then we could be discussing whether or not we need more data. I don't really disagree with any of the rest of the above post. Instead, you initially made this incorrect statement: "Sample size does...

Failure analysis and determining failure rates (which is where sample sizes are relevant) are distinct concepts, so it doesn't make sense to say "When you add to the sample size of one the engineering analysis you don't need statistics to know...

I dont think the design is good enough either, but the original claim that littlegreenmenfromhome was responding to is just incorrect. "Sample size does matter - technically the sample size to prove a design is insufficient is one. The sample...

California has made plug in solar available without any red tape, as long as its 1200W or less you just plug into any 15A plug in your house and poof, solar power.

Thats nifty. Can you have it always plugged into ac outlet to recharge but only use that feature when solar power is low?

How did you wire it into your home. Ghetto extension cable coming into house? Or did you setup a dedicated "solar power only outlet" ? Something else?

I imagine it'll be some sort of vapor chamber design. Less moving parts = less chance of failure. No heavy fluids = cheaper to launch. Depending on how they arrange things, purely conductive can be a viable option as well.

Yeah thats an interesting question. I assume you mean, for example, the astronauts in the apollo missions? I believe it got very cold when they turned off power for everything in apolllo 13. I dont know, but i would think its an equilibrium...

Im not saying your original idea is bad, i honestly dont know what they use for the coolant loop (water? Ammonia? Freon?). Just wanted the highlight the main issue.

The cooling problem people are describing is not really related to the cooling technology used. It's related to the fact there is no conductive or convective cooling in space. Only radiative. It means you need large surface area of radiative...

This should probably be its own post, instead of necroing an 8 year old post

you guys obviously haven't seen the typical german household.

I would say both. She has the qualifications (doctorate in theoretical physics, worked in various research institutes afterwards), but is often hypercritical of various fields of science. See professor dave's video on her to see the criticism of...

Use the macro option...

Dear erek , when you take a photo, most devices support quickly previewing the photo. This allows you to check if your photo is in focus. You can tell if your photo is not in focus because the object of interest is a blurry mess. This gives you...

If you want power balancing simulation of each vrm output you can reference page15. Tsumi i believe did current balancing (page 16?). Both are worse electrically if youre trying to get as much current through a connector as possible (both heat...

Yeah, some combo of microcontrollers and voltage/current monitor chip could work. But if you want some combination of "load balancing" and per-pin monitoring then I think the simpler solution is what Tsumi talks about in page15. Separate the...