Test Equipment Anonymous

BU508A wrote: ↑Tue Feb 04, 2025 6:25 am Local chemical heterogeneity enabled superior zero thermal expansion in nonstoichiometric pyrochlore magnets

Try saying that three times, fast!

Firing the Lorentz Plasma Cannon

Where is Wally? Extended version.

https://floor796.com/

I discovered this strange character on Youtube. A brilliant pianist but something of a nutcase. It amused me.

https://www.youtube.com/watch?v=PCx8Xcm ... Vinheteiro

https://www.youtube.com/shorts/kFv0G0SLvQ4

https://www.youtube.com/shorts/Xcmqe6Jb-pU

How big is a neutrino?

Well, probably not what one would expect.

https://www.nature.com/articles/s41586-024-08479-6#Sec1

"The Nagel–Schreckenberg model is a theoretical model for the simulation of freeway traffic."

https://en.wikipedia.org/wiki/Nagel%E2% ... berg_model

https://www.reddit.com/r/techsupportmacgyver/

https://www.reddit.com/r/techsupportgore/

These came up in my search results while I was trying to figure out how to get my X-Arcade's trackball working in a RetroPie build... lots of horror-show content; grab a cup of coffee and relax, kill a few minutes. For the record, I don't give a flying fuck how much moo-sqweezins you may or may not have in there.

mnem

"Tinkering" with pure Fluorine:

BU508A wrote: ↑Fri Feb 28, 2025 4:52 pm "Tinkering" with pure Fluorine:

Better pictures here: https://www.science.org/topic/blog-cate ... -work-with

Add a soupcon of chlorine, and...

"[ClF₃, chorine trifluoride] is apparently about the most vigorous fluorinating agent known, and is much more difficult to handle than fluorine gas."
"I’ll let the late John Clark describe the stuff, since he had first-hand experience in attempts to use it as rocket fuel. From his out-of-print classic Ignition! we have:
”It is, of course, extremely toxic, but that's the least of the problem. It is hypergolic with every known fuel, and so rapidly hypergolic that no ignition delay has ever been measured. It is also hypergolic with such things as cloth, wood, and test engineers, not to mention asbestos, sand, and water-with which it reacts explosively. It can be kept in some of the ordinary structural metals-steel, copper, aluminium, etc.-because of the formation of a thin film of insoluble metal fluoride which protects the bulk of the metal, just as the invisible coat of oxide on aluminium keeps it from burning up in the atmosphere. If, however, this coat is melted or scrubbed off, and has no chance to reform, the operator is confronted with the problem of coping with a metal-fluorine fire. For dealing with this situation, I have always recommended a good pair of running shoes.”
https://www.science.org/content/blog-po ... e-you-time

("Ignition!" is available at the internet archive)

A Youtube video 21:45 minutes long on the origins and end of Heathkit. I'm sure we've all built, or acquired at some stage, Heathkit gear.

10:30 to 16:40 is a quiz type presentation, which I found I could do without.

https://www.youtube.com/watch?v=V-F_Fz2G7BI

While bumbling around looking for a picture of a hand card punch, I came across
https://hoc.lgfl.org.uk/resource.html

Short videos of what there is at TNMoC, plus other stuff. Looks like it is a KS2/3 teacher's resource.

tggzzz wrote: ↑Wed Apr 30, 2025 10:49 am While bumbling around looking for a picture of a hand card punch, I came across
https://hoc.lgfl.org.uk/resource.html

Short videos of what there is at TNMoC, plus other stuff. Looks like it is a KS2/3 teacher's resource.

There's a hand punch available at the CHM in Mountain View. I've operated it. The card I'd punched was then verified by running it through a Model 26 Printing Card Punch in copy mode. Flawless.