_Microft

Tracks 3, 4 and 7 at the station in question are not adjacent to a platform. It sort of makes sense to route a train over these if there is no stop planned there (intentional or not).

Here's the map of the station:

https://www.bahnhof.de/troisdorf/karte

This train (RE5 (RRX) 28521) is not operated by Deutsche Bahn.

The operator is called National Express. Their trains look completely different than the ones of Deutsche Bahn.

https://nationalexpress.de/de/re5

Use two or more spaces at the beginning of a line and it will be formatted as code ("<code>") and then use symbols as you like.

  ┌──────╖
  │  OK  ║
  ╘══════╝

https://news.ycombinator.com/formatdoc

Maybe you like this - "paw connect", a whimsical version of the footprint for this connector:

https://github.com/LeoDJ/Paw-Connect

If you've got a budget of $1000 for that, have you considered getting a used 3D printer first? Some models are sold used for like 50€ (e.g. Ender 3 V2) on classified ads which hardly makes a dent in your overall budget. This will force you to actually familiarize yourself with the processes and will allow you to make more informed decisions later?

Great project!

The cost of the PCBs must be driven by assembly, right? The board itself should qualify for JLCPCB's budget offer at least: 2 layers (judging by the KiCAD-screenshot), < 100mm, HASL, nothing special about solder mask or board thickness either from the look of it. I'm not not sure about the plated slots of the USB connector, though? Do these cost extra?

How many did you get assembled per version? Just two of the boards or all five of them? Did you try to stick to using the standard parts or extended library? Which difference would it have made to do some work on the PCBs yourself, e.g. by soldering the through-hole connectors by hand?

Either way, it is definitely an amazing project!

Edit: as soon as any part is from the extended library, all different components (even standard ones) incur a cost for loading them into the pick and place machine, right? So minimizing number of different components is the only way of keeping the cost down, I guess.

I hope someone digs up a proper source for that because this one is a pile of AI slop illustrated with more AI slop.

Edit: I could not find anything yet.

Thanks for the detailed reply. I actually like the idea of using the accelerometer as input device and the design choice of using no buttons.

What’s the update rate of the LED matrix if I may ask? Maybe the combination of an accelerometer and the LEDs lends itself to a persistence of vision display?

If you are curious what PCB designs or schematics look like, you can use an online viewer for KiCad files to find out yourself:

https://kicanvas.org/?github=https%3A%2F%2Fgithub.com%2FNich...

@creator of the card (phirks?): have you considered further interactivity or maybe using the LED matrix for showing text or other information?

You could use touch buttons for control as they basically add nothing to the BOM?

Edit: this is of course really awesome as it is

How do you tell that you did not get any from a lot that was dyed/painted with a cheaper but toxic color?

Open the experiment animation and refresh the page multiple times to refresh the countdown while looking at the white pixel (from the same point of view) to get an even more impressive effect.

OT but maybe fun to know: the domain name translates as “sheep are glorified lawnmowers” ;)

The submitted article mentions that it was a study conducted on mice though?

[0] "In this study on mice with melanoma, the vaccine was able to clear existing tumors that had proven drug-resistant."

There is also an accompanying website for the project: https://101-things.readthedocs.io/en/latest/breadboard_radio...

Edit: actually this one might have been a better link than the one to the repository.

Here's the statement on the official website if you prefer that:

https://www.ipp.mpg.de/5532945/w7x

> This may be more of a proof for the method, of encapsulating a fragile mRNA in a protective lipid layer, but one which will be incorporated into cells. I'd expect it to be used outside attempts to cure HIV (having consumed some HIV funding).

What does that mean? (mRNA encapsulated in a lipid nanoparticle entering cells is exactly how the COVID vaccines of BioNTech and Moderna work)

Here's a direct link to the repository if you rather want to have a look there:

https://github.com/FujiNetWIFI

They might be - this was only an attempt to make sense of the first comment in the context of this submission.

If I had to guess, I would say that Earth's magnetic field is used in directional drilling to tell which way your drill head is going and that the solar storm distorts Earth's magnetic field.

The Ford Mustang Mach-E has a physical wheel on its touch screen.

Thanks, this was very insightful and entertaining once again!

One thing: you might want to mention the required board thickness (0.8mm, iirc?) for people planning to have their own boards made.

Edit, explanation for others: that is required to make the "USB-C edge connector" fit the plug.

The different lengths that they are measuring after their fix are most likely because the transparent plastics (n_p ≈ 1.5) has a different refractive index than air (n_air = 1). That is the optical path length is no longer the same.

https://en.m.wikipedia.org/wiki/Optical_path_length

If you can downvote any comment, then you've got downvote powers.

You cannot downvote direct replies to your own comments though if that helps understanding what might be happening here.

The description in the wiki was not updated yet. Follow the link to the PCBWay page to see the current description. The limit is 100Msps when using a Pico (i.e. RP2040, not RP2350).

120 channels are achieved by chaining a few 24 channel boards.

https://www.pcbway.com/project/shareproject/LogicAnalyzer_V6...

The headline shown here is:

“US government struggles to rehire nuclear safety staff it laid off days ago”

The link to the paper is hidden a few links into the article (what's up with all these 'tags' that they link to?):

"A Recyclable Inert Inorganic Framework Assisted Solid-State Electrolyte for Long-Life Aluminum Ion Batteries", https://pubs.acs.org/doi/10.1021/acscentsci.4c01615 (Open Access)

Wikipedia has an article on hyperspectral imaging that also talks about how these images are acquired.

https://en.wikipedia.org/wiki/Hyperspectral_imaging

There is now a set of critical operations, among them starting printing operations via LAN which "unauthorized third party tools" are no longer allowed to perform.

The most interesting information is in this setion and the following one:

https://blog.bambulab.com/firmware-update-introducing-new-au...

They had pegged their currency to the DM (Deutsche Mark) and 1.95583:1 is still exactly the same exchange rate as when DM were converted to Euro.

Don‘t they even have an ISDN network there this year?