Fogbow

John Thomas8 wrote: ↑Thu Sep 28, 2023 6:34 am

I've backed this project for one device. Hoping they would ship before Christmas to give to my niece and nephew-in-law, but alas they are still months away.

RTH10260 wrote: ↑Sat Dec 30, 2023 6:23 am https: //youtu.be/8HEfIJlcFbs

Glitter bomb guy makes a domino bot. That was kewl. I was surprised at the different propagation rate in each lane. Some were much faster / slower. It wasn't anywhere near a staright line across each section as they dropped.

Glitter bomb guy aka domino bot guy is also Math Geek Boy. He explains the circular paradox.

I chose 3 for my answer, but I was uneasy about it thinking that there was something more going on than I could work out in the 30 seconds.

ETA: Record velocity

30,000+ BPS models:

Drone geeks can now keep up with Formula 1 race cars as they navigate the course at speed!

Keeping with the drone theme, this article in The Old Gray Lady discusses autonomous attack vehicles.

NYT gift article on drone wars

from the comments: what should we film next with the fastest camera drone in the world?

--->>> build the fastest camera drone that can keep up and film the fastest camera drone

ps. next is the camera drone that includes swarm capabilities and anti-collision software, cause every race team will want their individual camera drone tracking their own racing car

bill_g wrote: ↑Fri Mar 01, 2024 9:59 am Keeping with the drone theme, this article in The Old Gray Lady discusses autonomous attack vehicles.

NYT gift article on drone wars

Yeah - I guess the Ukrainians will want to get their hands on this technology and velcro-strap some explosives to these birds ...

RTH10260 wrote: ↑Fri Mar 01, 2024 10:06 am

bill_g wrote: ↑Fri Mar 01, 2024 9:59 am Keeping with the drone theme, this article in The Old Gray Lady discusses autonomous attack vehicles.

NYT gift article on drone wars

Yeah - I guess the Ukrainians will want to get their hands on this technology and velcro-strap some explosives to these birds ...

Yep. Seems to be innate human behavior. Make a discovery, and then figure out if you can bop someone on the head with it.

Hey! Look at me! I'm riding a horse!
Yeah Grok. Wonderful. But can you throw a spear from it while riding towards a village?

That's some fine engineering, but I also like the video editing, the short snippets of each step, not loooooong repeated stuff.

a true Lego afficionado

YT channel https://www.youtube.com/@BrickTechnology

That's a lot of innovation to amuse some cats! (wink)

AND! There was no safety interlock to keep the brakes applied until the doors were fully closed*. (harumph)

* That was an actual problem I was hired to solve at our local mass transit service. They wanted to prevent their vehicles from moving until all doors were closed. The OEM put microswitches in the door mechanism that engaged the brakes until the doors were fully closed. However, as the mechanisms aged, they got a little sloppy. The doors rattled as the vehicle moved. In the worst cases, the safety system applied full brakes as the vehicle was at speed. Not good. And since the doors were actually chattering (open, closed, open, closed), so did the brakes. Totally awful passenger experience.

My solution was two microswitches and some logic. We kept the OEM fully closed switches. We added a fully open switch, a vehicle motion sensor, and some TTL (hard wired logic) I built. With the vehicle stopped, and doors closed, the brakes were not applied until the doors fully opened (set). The brakes would remain applied until the doors fully closed (reset). When the vehicle was in motion, the interlock was disengaged.

There were some differences between vehicle series (manufacturers, model years), but eventually arrived at a solution that met their requirements. Then it was a matter of getting the designs approved by the Feds. This is where I signed over the rights to the customer so they could offer them to the multiple OEMs since that is where their expertise lie. It took a few years to dev and incorporate into new builds as well as come up with aftermarket solutions for the existing fleet.

It was fun.

Coooooooool!

Maiden flight






Then when painted

Not sure which is more impressive, that plane or the guy's estate.

If you think you want a chainsaw as a pencil sharpener, here is the DIY for you. Super simple with the right tools. Of course.