schobi

The diagrams for the new west south and east zones still show a lot of wires going all across the vehicle. This step might be a good first one to reduce the number of ECUs by combining them, but there is still the same cross-car wiring. You still seem to have a single ECU per function, but merged into a few dedicated boxes for example.

Next step: Each wire only goes to the nearest box. I'm curious how the Tesla unboxed architecture will eventually play out. I understand that eventually, the ECUs will be split up, so you have some aspect of each ECU in each corner of the vehicle. Part of the "lights" function is in front-left, part of it in the back. Wires only go to the nearest box.

A powerful vision, with the potential to further reduce wiring. Complex until you get a distributed brake ECU.

The article is indeed hard to understand on its own.

From the linked 2022 paper: BLE sends beacons hundred times per minute, even from phones. For privacy reasons the Mac addresses are randomized. The attacker can further analyze the beacons for imperfections in the rf signal and get a fingerprint for devices from frequency offsets/drift/iq imbalance.

Haven't seen the new paper, but the article suggests the a firmware change can even reduce this attack vector. I guess that introducing further randomization in chipset parameters for each beacon can make this kind of tracking harder still. I doubt that this hides all aspects of fingerprinting and settings stepsizes would still be observable, just harder to track. "Randomization pattern F is this manufacturer gen 2025 devices"

My take on this: most of the day, I would not need any beacons at all - maybe there is an intelligent limit on avoiding them? Configurable? Only when unlocked? Only when in motion? Sometimes sending half the beacons would double the time needed for tracking already. Again, this would boil down to "a firmware update could improve privacy"

It sucks to realize that someone else beat you to a proper release. Happened in my last job, we went though the stages of grief just as the author here.

In the end you learned a lot about new technology, about your pace of development, about you thinking, about aspects you like and don't like. The lessons learned "ship it" prepares for next time.

It is great to see that this is accessible and possible with limited effort/budget!

On the higher speeds, it remains difficult: In the datacenter, 10G ethernet is often standard or even outdated. But for non-mains powered systems, even 10G uplink is hard to come by. I would love to have a switch with 25/100G uplinks in a smaller-than-19"-rack form factor with 12-40V DC power. Building one as a side project might still be too complex - if you would get access to chipsets at all.

I would go with something like sift features (or a non patented variant thereof if you plan commercial usage). You analyze a first picture and extract the center part. You run a feature detector on each image and the can cheaply match (scale and rotation invariant) against each other - this gives rotation and scaling.

I understand your hesitation in opening the code. Still, the idea seems really great, low complexity (quick local processing, no database of songs needed) and robust (any reasonable vinyl could work).

I suggest considering writing about it. Maybe a whitepaper? A publication? A patent application? May be colab with audio researchers? Or get sponsored from an audiophile record player manufacturer?

I agree. Depending on the type of hypothetical website, you could expect that most traffic comes e.g. during the week at business hours, or maybe in the evening after work. You need to design for that spike in workload (maybe 10x?)

There was a story recently about running the workload of Twitter from a single machine: https://news.ycombinator.com/item?id=34291191

Yes - possible but no redundancy, difficult maintenance

Wonderful game!

Feature request: please localize... I hardly know the bird names in my language. Learning the English names is not helping.

I understand the goal of LCD aesthetics and going down the rabbit hole of "how would that look like" in this post.

But if you want a long battery life handheld console, why not consider e papers? You could keep the original game experience of judging text+image. No need to restrict the random faces. But I'm not understanding the epaper pricings - this seems a viable option for a self made printed game with BOM 50$, but not a mass market consumer game for retail 10$

Yes - shovel and bucket. I took 50cm rings each, for a total of 9 for 4.5m. They weigh about 300kg each and could be rolled into the garden. I got some scaffolding pipes and built a "gantry" over my hole. We could lower them by attaching a small chain operated pulley.

I went to 4.5m - the rings did not slide easily any more as we paused for a year. If you work on it right away, you can go much further

I went with an inner diameter of 1m, this is fine for a small shovel, a pump, a small jackhammer.

Concrete rings are used all the time in road construction work. I don't see a risk of collapse with those when stacking carefully. Even if one ring were to get a crack, where should it go? I felt safe in this regard

I built such a well... The concrete rings will just sloooowly slide down once there is room under them. If you dig evenly, they will just go down straight. Only a few centimeters at a time. This part does not feel dangerous. As a bonus,you can buy concrete rings with steps included, so you don't need to buy a 5m long ladder.

In historic well digging the walls needed to be secured with wooden planks or bricks and such after digging straight down. Huge risk of the walls falling in. This was a problem just generations ago... And all of the family had stories of grandfather's digging wells that collapsed and that the historic approach was dangerous.

With concrete rings, there is no danger of collapsing. And certainly, when placing a ring, noone should be standing inside!

But yes... - It becomes a little claustrophobic when this becomes deep. I stopped at 4.5m and got used to it by the time we came that deep. - I put a pipe in to blow fresh air to the bottom. This helps with the uneasy feeling of a possible bad smell - there is a risk of dropping a bucket on the head. Use a proper rope, a proper knot, a proper bucket made for lifting and stop when the guy above needs a break

It is nice to get that many details on a single drilling method. But keep in mind - there are many more techniques for making your own well. Some might be better suited depending on the conditions.

There are hand operated drills, 150mm diameter with extension rods up to 10-15m long. If it works for your soil, then this is less messy.

I went with digging and a different type of dug well "Schachtbrunnen". I laid a pre-fabricated concrete ring on the ground and started digging inside until it sank into the ground. When it was level, I put the next ring on top. No special tool needed, a shovel, a bucket, some rope, patience and certainly a permit.

The EU regulation is about industrial use of fluorinated greenhouse gasses.. I don't think that will ban other refrigerants

Not going to happen!

Photons of different wavelength are absorbed and converted at different depth in silicon sensors. Blue photons mostly convert at the surface, while red go much deeper into the sensor. The pixel electronics of a regular cmos image sensor however will only collect the resulting electrons in a certain region at the surface. If an electron is generated somewhere else, it will recombine and be 'lost', not contributing to the signal.

Depending on the sensor, at 1000nm only <10% of the photons will result in electrons that are captured by the pixel electronics. The sensor does not give you any signal any more.

Why? Silicon has a band gap of 1.12eV - photons with lower energy will not interact. This corresponds to ~1100nm - you will need sensors with different materials

This! Enable them to get in contact with their dreams.

Offer to drive the kids somewhere to like minded people, maker spaces and such, museums or exhibitions. Lookout for possible events like lectures, presentations, meetups, evening schools, summer courses. Help to find good deals on some used equipment and materials (whatever that might be) and try to provide some space to work on. Help to create financial support for tools and materials, even if it is just arranging for mowing the neighbour's lawn so that they can earn the required money.

I would even go for

const RESEND_DELAY_MS = 3600*1000; // because TTL in Agora

Easier to check for the right number of zeros

We have "natural" joghurt in all stores (Germany) without any sugar. A breakfast with <1g of sugar is possible but requires some searching

I also met a few German parents who were a little irritated "oh no! Don't take it apart! " But the kids are fine and often curious about all the things inside.

I really love the Sigikid "Erwin little patient" toy - you can take out all the organs and start explaining. Available only in Germany? https://sigikid.de/shop/spielen-kuscheln/rollenspiel/lerntie...

Unfortunately, the girl version is discontinued

It is just the same with your eye - and camera response curves are optimized to be similar to your eye. There is metamerism - many spectral distributions will look the same to your eye as well as to a camera. See https://en.m.wikipedia.org/wiki/Metamerism_(color)