@robryk@qoto.org avatar

robryk

@robryk@qoto.org

I enjoy things around information theory (and data compression), complexity theory (and cryptography), read hard scifi, currently work in infosec, am somewhat literal minded and have approximate knowledge of random things. I like when statements have truth values, and when things can be described simply (which is not exactly the same as shortly) and yet have interesting properties.

I live in the largest city of Switzerland (and yet have cow and sheep pastures and a swimmable lake within a few hundred meters of my place :)). I speak Polish, English, German, and can understand simple Swiss German and French.

If in doubt, please err on the side of being direct with me. I very much appreciate when people tell me that I'm being inaccurate. I think that satisfying people's curiosity is the most important thing I could be doing (and usually enjoy doing it). I am normally terse in my writing and would appreciate requests to verbosify.

I appreciate if my grammar or style is corrected (in any of the languages I use here).

Dieses Profil is von einem föderierten Server und möglicherweise unvollständig. Auf der Original-Instanz anzeigen

foone , an Random Englisch
@foone@digipres.club avatar

I saw this voltmeter at the electronics flea market. Look at that massive probe! It looks like you need to check your back blast before using it.
Apparently it's for REALLY high voltages? Like, 3kV?

robryk ,
@robryk@qoto.org avatar

@foone

What's the dial on the probe?

foone , an Random Englisch
@foone@digipres.club avatar

Properly photographing a 3.5" floppy disk for archival is annoyingly complicated. The label has THREE sides!

I've already built an automated system to take a picture of the front of a disk, but really I need to take THREE photos if I want to get the whole thing.

That means either three cameras or I need to rotate the disk 90° and then 180°, which is going to really stress the limits of my mechanical engineering skills.

robryk ,
@robryk@qoto.org avatar

@foone With some more mirrors you could get all 3 distances to be closer to equal (getting them exactly equal is not that helpful given that even one side is not at a constant distance from the focal point, unless you arrange for some lens arrangement that has an effective focal point very far away).

robryk ,
@robryk@qoto.org avatar

@foone

If you let the disk fall/slide into a slot shutter-side-first (and stop it there for a while, presumably with another servo) you could probably use the same camera for front and side.

TechConnectify , an Random Englisch
@TechConnectify@mas.to avatar

Proposal to refer to solar arrays as amp farms.

robryk ,
@robryk@qoto.org avatar

@TechConnectify

I would intuitively rather refer to them as Joule farms, so I'm probably not seeing some pun here. If there is one, can you explain it?

root42 , an Random Englisch
@root42@chaos.social avatar

Great video about simmerstats in stovetops:

https://youtu.be/ff04ecF9Dfw?si=p2Fr8KgeC16YIePT

@TechConnectify Can you also explain European stovetops with
A) 3-phase 400V power compared to the two 120V phases?
B) knobs with individual positions, compared to the continuous cams?

I am especially wondering about the latter. I remember our stovetop from my childhood having something like 6 discrete steps or so.

robryk ,
@robryk@qoto.org avatar

@TechConnectify @root42

A friend of mind had a 3-phase tankless water heater that would, depending on water flow, either connect some resistors between phases and ground (getting 230V on each) or across phases (getting 400V on each)[1]. I don't know whether stoves did anything of that sort.

[1] We found this out in a very amusing way: the setup was kinda borked, in that the main circuit breaker for the house wasn't ganged. If you tripped one phase only in that CB, you'd get some lowish (<100V) voltage on that phase if you opened a hot water tap to the correct degree. Thus, in that state the hot water tap controlled ~a third of the lights in the place.

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