Author Topic: Fun for nerds (Read 131481 times)

BU508A · « **Reply #375 on:** July 14, 2022, 09:13:07 am »

I've learnt something new about Star Trek.

RoGeorge · « **Reply #376 on:** July 16, 2022, 07:15:59 pm »

How Does The Anti-Gravity Wheel Work?
The Action Lab

RoGeorge · « **Reply #377 on:** July 22, 2022, 01:29:55 pm »

Iodine Satellites - Periodic Table of Videos
Periodic Videos

RoGeorge · « **Reply #378 on:** July 23, 2022, 08:33:55 pm »

DIY Adaptive Optics?

RoGeorge · « **Reply #379 on:** July 24, 2022, 07:46:31 am »

After finding out that Intel 4004 was not the first microprocessor, now this, transistor 25 years before the transistor:

Quote

Losev conducted some of the earliest research into semiconductors, publishing 43 papers and receiving 16 "author's certificates" (the Soviet version of patents) for his discoveries. He observed light emission from carborundum point-contact junctions, constructing a light-emitting diode (LED), did the first research on them, proposed the first correct theory of how they worked, and used them in practical applications such as electroluminescence. He explored negative resistance in semiconductor junctions, and was first to use them practically for amplification, building the first solid-state amplifiers, electronic oscillators, and superheterodyne radio receivers, 25 years before the invention of the transistor.

From: https://en.wikipedia.org/wiki/Oleg_Losev#Solid-state_electronics

My entire life is a lie.

Ed.Kloonk · « **Reply #380 on:** July 24, 2022, 01:47:45 pm »

RoGeorge · « **Reply #381 on:** July 30, 2022, 02:41:30 pm »

Voyager 1 and 2 Detected Something Beyond the Edge of Our Solar System
Astrum

RoGeorge · « **Reply #382 on:** July 31, 2022, 04:33:45 pm »

Superposition in Quantum Computers - Computerphile
Computerphile

Yes, that's exactly why I think it can be done with analog (AC) computing and no zombie cats thank you!

RoGeorge · « **Reply #383 on:** August 02, 2022, 10:10:53 am »

The Microscope Upgrades We've Made Along The Way | Compilation
Journey to the Microcosmos

RoGeorge · « **Reply #384 on:** August 03, 2022, 05:11:12 pm »

Are We Living In a Dream?
The Action Lab

- OMG, OMG, so it's not turtles all the way down?!

- Nope. It's Inception all the way down.

BU508A · « **Reply #385 on:** August 05, 2022, 04:54:15 pm »

RoGeorge · « **Reply #386 on:** August 06, 2022, 08:21:27 am »

TNP #20 - Teardown, Repair & Experiments with Stanford Research Systems SR830 DSP Lock-in Amplifier
https://www.youtube.com/c/Thesignalpath

Neat way to match diodes!

Same idea (of building a symmetric circuit then measure the symmetry of its waveform by looking at the second harmonic) should work to pair any other type of non linear components, too.

Ed.Kloonk · « **Reply #387 on:** August 09, 2022, 05:54:40 am »

I think Shatner is going to out live the rest of them.

Whose with me?

RoGeorge · « **Reply #388 on:** August 12, 2022, 07:29:02 pm »

4K CABVIEW: Aurora borealis, northern lights, visible in August! 🤩
RailCowGirl

RoGeorge · « **Reply #389 on:** August 13, 2022, 05:33:40 pm »

The Nescafé Equation (43 coffee beans) - Numberphile
Numberphile

The fuel consumption of a car is 5 liters / 100km.
1L == 0.001m³
100km == 100 000m
1m == 1 000mm

5L/100km == 5*0.001m³/100000m == 0.05x10^-6m² == 0.05(mm)²
so the fuel consumption of that car is fifty mili square-milimeters.

RoGeorge · « **Reply #390 on:** August 20, 2022, 04:58:05 am »

Bell Labs - The Company that Invented the Future
Curious Droid

T3sl4co1l · « **Reply #391 on:** August 21, 2022, 03:57:23 am »

Neat visibility demo: https://moxil-shah.github.io/Isovist-Sandbox/

Wonder if they're going to put a 3D view on it sometime, heh.

I'm reminded of some demos I did years ago.

Tim