Hackaday Links: January 20, 2019

Let’s say you’re an infosec company, and you want some free press. How would you do that? The answer is Fortnite. Yes, this is how you hack Fortnite. This is how to hack Fortnite. The phrase ‘how to hack Fortnite’ is a very popular search term, and simply by including that phrase into the opening paragraph of this post guarantees more views. This is how you SEO.

Lasers kill cameras. Someone at CES visited the AEye booth, snapped a picture of an autonomous car at AEye’s booth, and the LIDAR killed the sensor. Every subsequent picture had a purple spot in the same place. While we know lasers can kill camera sensors, and this is a great example of that, this does open the door to a few questions: if autonomous cars have LIDAR and are covered in cameras, what’s going to happen to the cameras in an autonomous car driving beside another autonomous car? Has anyone ever seen more than one Cruise or Waymo car in the same place at the same time? As an aside, AEye’s company website’s URL is aeye.ai, nearly beating penisland.net (they sell pens on Pen Island) as the worst company URL ever.

This is something I’ve been saying for years, but now there’s finally a study backing me up. Lego is a viable investment strategy. An economist at Russia’s Higher School of Economics published a study, collecting the initial sale price of Lego sets from 1987 to 2015. These were then compared to sales of full sets on the secondary market. Returns were anywhere between 10 and 20% per year, which is crazy. Smaller sets (up to about 100 pieces) had higher returns than larger sets. This goes against my previous belief that a Hogwarts Castle, Saturn V, and UCS Falcon-heavy portfolio would outperform a portfolio made of cheap Lego sets. However, this observation could be tied to the fact that smaller sets included minifig-only packaging, and we all know the Lego minifig market is a completely different ball of wax. The Darth Revan minifig, sold as an exclusive for $3.99 just a few years ago, now fetches $35 on Bricklink. Further study is needed, specifically to separate the minifig market from the complete set market, but the evidence is coming in: Lego is a viable investment strategy, even when you include the 1-2% yearly cost of storing the sets.

Relativity Space got a launchpad. Relativity Space is an aerospace startup that’s building a rocket capable of lobbing my car into Low Earth Orbit with a methalox engine. They’re doing it with 3D printing. [Bryce Salmi], one of the hardware engineers at Relativity Space, recently gave a talk at the Hackaday Superconference about printing an entire rocket. The design is ambitious, but if there’s one device that’s perfectly suited for 3D printing, it’s a rocket engine. There are a lot of nonmachinable tubes going everywhere in those things.

18 thoughts on “Hackaday Links: January 20, 2019

  1. Presumably the car’s own cameras have filters that block the light frequency of the LIDAR arrays, would be stupid not to mount such systems, otherwise just driving past some buildings with mirrored windows would produce the same effect.

      1. Coming up at 6:00 tonight. An exclusive first report, only on NitWitness Local News.
        The shocking rise in use of self driving cars, by criminals and the reasons why!!!

  2. Last I “looked”, lasers weren’t too good for human eyes either.
    Maybe I need to start wearing laser glasses everywhere. Also makes me wonder what frequency they are using for the lidar. IR usually just bounces off glass. What is that camera lens made out of?
    Is this just an urban legend or an observer thing?

      1. Perhaps nothing. The lens (aperture) of a camera (except cellphone cam) is normally much bigger than the lens of the eye. The worst combination is a video beamer opposite a lasershow projector. The big lens catches enough energy to damage the DLP chip. The tiny moving mirrors have also much less heat capacity then the water filled human eye.

  3. Dichroic filters are used on the cameras when long range LIDAR is nearby. They typically reflect wavelengths longer than 1100nm, and pass everything shorter. Because the long range LIDAR lasers are at a “eye safe” wavelength (meaning it only burns your cornea) of 1400nm or longer, the cameras are protected. Silicon is nearly transparent at these wavelengths, but two-photon absorption becomes a dominant mechanism of damage. Shorter range systems sometimes use shorter wavelength lasers with optical notch filters on the cameras, and a band pass filter on the APD detector.

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