Author Topic: Fun for nerds (Read 132499 times)

BU508A · « **Reply #450 on:** February 21, 2023, 05:14:54 pm »

Ever wanted to do a hologram? Here is a construction method for a DIY hologram technique:

BU508A · « **Reply #451 on:** February 24, 2023, 02:04:24 pm »

Fusion reactor runs for more than 8 minutes in a row:

NiHaoMike · « **Reply #452 on:** February 25, 2023, 01:50:43 pm »

C compiler tries to disprove Fermat's Last Theorem:
https://blog.regehr.org/archives/140

T3sl4co1l · « **Reply #453 on:** February 27, 2023, 08:22:12 am »

This explains the Riemann Hypothesis better than anything else I've seen:

May also be of interest, for complex analysis / calculus background:

TomKatt · « **Reply #454 on:** February 28, 2023, 12:59:06 pm »

Reddit's Engineering Porn and Mechanical GIFS sites are great for quick browsing of interesting things...

kashafjack · « **Reply #455 on:** March 04, 2023, 01:19:58 pm »

I am always exploring new activities in the online market in my free time by following Reddit communities.

RoGeorge · « **Reply #456 on:** March 15, 2023, 07:02:07 am »

What Does an Electron Look Like?
The Action Lab

RoGeorge · « **Reply #457 on:** March 16, 2023, 05:23:28 am »

ESA’s million-year time machine
Curious Droid

RoGeorge · « **Reply #458 on:** March 17, 2023, 07:49:07 am »

#366: Back to Basics: Basics of the Bipolar Transistor - NPN and PNP
w2aew

DavidAlfa · « **Reply #459 on:** March 17, 2023, 09:50:25 pm »

Not joking, this failed capacitor on a friend's TV (Shorted) came signaled from factory

RoGeorge · « **Reply #460 on:** March 18, 2023, 05:46:49 am »

The INSANE Precision of The National Institute of Standards and Technology
Machine Thinking

NiHaoMike · « **Reply #461 on:** March 18, 2023, 03:41:21 pm »

Anyone want to try to outdo it? I'm thinking it can easily be done with a bunch of high power green LEDs, but it would just end up a rather expensive toy.

RoGeorge · « **Reply #462 on:** March 19, 2023, 04:57:09 am »

Do Superconductors Attract Each Other?
The Action Lab

RoGeorge · « **Reply #463 on:** March 20, 2023, 08:48:43 am »

World's Strongest Magnet!
Veritasium

BU508A · « **Reply #464 on:** March 21, 2023, 07:31:52 pm »

The first episode of a total series of six episodes about The Great Seal Bug from the Machining and Microwaves channel:

BU508A · « **Reply #465 on:** March 23, 2023, 11:17:20 am »

56 transition controls for a triple inverted pendulum

RoGeorge · « **Reply #466 on:** March 31, 2023, 05:36:15 pm »

What Does The Strong Nuclear Force Look Like?
The Action Lab

NiHaoMike · « **Reply #467 on:** April 01, 2023, 03:37:22 am »

RoGeorge · « **Reply #468 on:** April 03, 2023, 10:05:55 am »

Galileo bad

https://intellectualmathematics.com/opinionated-history-of-mathematics/

RoGeorge · « **Reply #469 on:** April 08, 2023, 08:42:36 am »

SOLENOIDS & RELAYS - The Secret Life of Components, a series of guides for makers and designers - 15
tim hunkin

RoGeorge · « **Reply #470 on:** April 09, 2023, 09:43:38 am »

Make a PCB with 3D printer, UV led and photosensitive film
Wil Straver

RoGeorge · « **Reply #471 on:** April 14, 2023, 07:29:47 am »

The Stern-Gerlach Experiment (ESI 1967)
TSG Physics

RoGeorge · « **Reply #472 on:** April 19, 2023, 08:53:50 am »

Imaginary Numbers Are Real
Welch Labs

https://www.youtube.com/playlist?list=PLiaHhY2iBX9g6KIvZ_703G3KJXapKkNaF

"That this subject [imaginary numbers] has hitherto been surrounded by mysterious obscurity, is to be attributed largely to an ill adapted notation. If, for example, +1, -1, and the square root of -1 had been called direct, inverse and lateral units, instead of positive, negative and imaginary (or even impossible), such an obscurity would have been out of the question." - Gauss

T3sl4co1l · « **Reply #473 on:** April 20, 2023, 03:30:09 pm »

Weird...
https://spectrum.ieee.org/piezoelectric-liquid
Wonder what kinds of useful things could come of it? Doesn't make much sense to me offhand. To be clear, I'm more than satisfied with understanding it as a research curiosity if nothing else.

Tim

RoGeorge · « **Reply #474 on:** April 20, 2023, 03:55:24 pm »

Quote from: T3sl4co1l on April 20, 2023, 03:30:09 pm

Weird...
https://spectrum.ieee.org/piezoelectric-liquid
Wonder what kinds of useful things could come of it? Doesn't make much sense to me offhand. To be clear, I'm more than satisfied with understanding it as a research curiosity if nothing else.

Tim

From the i3e link:

Quote

Conversely, an electric charge applied to these materials distorts their structures.

I know water, too, can be shaped with high voltage (electrowetting). Makes me wonder if water can be piezoelectric, too.

If so, might explain why a hit in the head can knock out one unconscious: it's the electric shock generated by the piezo-water inside the brain.

There was someone making electrically-controlled focus-tunable lenses, where the focal distance of a single lens was controlled by a voltage, no motors, based on electrowetting. Thought his electro-lenses were oil based IIRC, a French guy some 10 years ago or so.


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Author Topic: Fun for nerds (Read 132499 times)

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