I have heard, but have trouble finding references to it, that you can build a simple arbitrary waveform generator circuit by using an analog scope, a photodiode, and a cardboard cutout.

You make a photodiode circuit that rails high with no light, but light on the photodiode pushes the signal low. Then you aim this at the phosphor screen with a cardboard cutout of the desired waveform: signal goes up until the phosphor trace is above the screen, and then it gets pushed low (i.e., feedback keeps the trace right on the edge of the cardboard).

Never seen it in action, but I choose to believe it works beautifully :)

Not sure “asshole” is right for Torvalds…maybe there’s another word to describe him…

(See the last bit in Notable Usage.)

“…I really don’t want to have to wipe the thing because it’s running a headless OS”

I feel like logging in as root on a headless system and hoping you type the command(s) to restore functionality is a rite of passage.

After reading a few of these I feel like I was either a very boring grad student, or my professors were all very chill. (Or maybe just subject to male privilege.)

A few run-ins with IT, but I don’t think I ever got nasty letters from professors…

I’ve been pleased with it. Family is very relaxed about projects like this, but yeah it’s low power draw. I don’t think I have anything special set up but the right thing to do for power would be to spin down drive when not in use, as power is dominated by the spinning rust.

Uptime is great. Only hiccups are that it can choke when compiling the ZFS kernel modules, triggered on kernel updates. It’s an rpi 3/1GB RAM (I keep failing at forcing dkms to use only 1 thread, which would probably fix these hiccups 🤷).

That said, it is managed by me, so sometimes errors go unnoticed. I had recent issues where I missed a week of rsync because I switched from pihole to technitium on my home server and forgot to point the remote rpi there. This would all have been fixed with proper cron email setup…I’m clearly not a professional :)

Not the same, but for my Immich backup I have a raspberry pi and an HDD with family (remote).

Backup is rsync, and a simple script to make ZFS snapshots (retaining X daily, Y weekly). Connected via “raw” WireGuard.

Setup works well, although it’s never been needed.

Link(s) in post contain punctuation and break, at least on my client. Here’s the codeberg link (working);

https://codeberg.org/BobbyLLM/llama-conductor

I mean, isn’t that what ringing is for—asking if they want to talk? It’s ok to decline a call.

I feel like people who don’t like salads really just don’t like salad dressing (and vice versa, I guess).

Smother those salads in a simple red wine vinegar and Dijon + EVOO dressing and I’d be plenty happy.

https://www.superbowl-ads.com/1997-tabasco-mosquito/

Best ad ever IMHO (sorry for funky link, YouTube if you prefer).

No dialog, no rampant consumerism (hot sauce is a necessary food), no sex/sexism, no emotional manipulation.

From link:

NOTE: The script is broken, DO NOT ATTEMPT TO USE THE SCRIPT NOW. Attempting to run it may get your account flagged stopping you from trying face verification either temporarily or permanently, forcing you to use your ID.

pr: https://github.com/xyzeva/k-id-age-verifier/pull/12

That almost makes sense, but pi radians = 180°

Right, a triangle “has 180deg,” like I said.

in which case π÷n is infinitesimally small. In other words, substituting infinity for n would be incalculable

That’s not how limits work. Substitution is not the same as taking the limit.

infinite and infinitesimal numbers are impossible to express rationally.

That’s not true at all. https://en.wikipedia.org/wiki/1/2_%2B_1/4_%2B_1/8_%2B_1/16_%2B_⋯

It’s not about colloquialism or language

Having one word (or phrase) with two meanings is a property of language.

That’s exactly my point, there are two different colloquial ways of talking about angles. I am not claiming there is a mathematical inconsistency.

Colloquially, a “triangle has 180 degrees” and a “circle has 360 degrees.” Maybe that’s different in different education systems, but certainly in the US that’s how things are taught at the introductory level.

The sum of internal angles for a regular polygon with n sides is (n-2)×pi. In the limit of n going to infinity, a regular polygon is a circle. From above it’s clear that the sum of the internal angles also goes to infinity (wheres for n=3 it’s pi radians, as expected for a triangle).

There is no mystery here, I am just complaining about sloppy colloquial language that, in my opinion, doesn’t foster good geometric intuition, especially as one is learning geometry.

I don’t think we’re talking about the same thing.

If you take a circle to be the limit of a polygon as the number of sides goes to infinity, then you have infinite interior angles, with each angle approaching 180deg, as the edges become infinitely short and approach being parallel. The sum of the angles is infinite in this case.

If you reduce this to three sides instead of infinite, then you get a triangle with a sum of interior angles of 180deg which we know and love.

On the other hand, any closed shape (Euclidean, blah blah), from the inside, is 360deg basically by definition.

It’s just a different meaning of angle.

See, for example, the internal angle sum, which is unbounded: https://en.wikipedia.org/wiki/Regular_polygon

Triangle, “has 180 degrees,” subtends 360 degrees.

Circle, “has 360 degrees,” the sum of the interior angles is infinite.

(I’m not actually confused, it’s just that “a circle has 360 degrees” and “a triangle has 180 degrees” is a little annoying in that they use different definitions.)

SEA vs. NE, it said so right on the TV.

…now, why Seattle-Tacoma International Airport and an intercardinal direction are playing each other is anybody’s guess. Maybe one of the runways has a nasty NorthEasterly crosswind?

Or, malicious compliance by someone with a moral compass. Best is to somehow leak documents wholesale. But if that’s not possible, I think the next best way to all but guarantee that the information gets out is to do a lousy job censoring, and let “The Internet” do the rest. It also makes the administration look even more stupid, especially in the eyes of technically minded folks.

But yeah, not the best and brightest, that’s certainly a possibility.

If Gentoo can be both Chad and Schizo, Slack should definitely be in the Chad category too.

I mean, it’s Torvalds’ distro of choice iirc, which should count for something.

High frequency is generally bad for transmission line losses, so getting power from A to B is better at lower frequency — DC is a great option here.

If we switched to DC, many things would still flicker though as they would presumably use switching power supplies, but those could be relatively high frequency like you said.

Interestingly, airplanes use 400Hz, as transmission over distance doesn’t matter, and transformers can be made much smaller/lighter.