kanetw

6 ms·

1.
by kanetw 2y ago
The short, stupid answer is: transistor count and size. Explaining it in detail requires more background in electronics, but that's ultimately what it boils down to. High-end analog front ends can reach the three-digit GHz (non-silicon
2.
by kanetw 2y ago
The Kria SOM in use here is like $300.
3.
by kanetw 3y ago
KF funnily enough is one of the few remaining websites for reasonable discussions about politically charged topics. The defendant not showing up is peak stupid. Especially if you think it's a non-issue, fucking show up. Anyway, it will
4.
by kanetw 3y ago
The key factor is how fast units need to ship. In general, the scaling is sub-linear due to 1. reduced per-component costs (volume discounts) 2. less administrative/engineering overhead (ie the salaries/one-off costs get divided a
5.
by kanetw 3y ago
No, we fully agree it's a hard problem. Which is why we wrote functional software first, and then went into hardware when the existing hardware couldn't support our use cases. There's problems with the software that need to b
6.
by kanetw 3y ago
With our current design, we break even at about exactly 1k units.
7.
by kanetw 3y ago
We're still accepting SAFEs. Contact georges@simulavr.com for details.
8.
by kanetw 3y ago
Yeah, understandable. For us it's a deliberate design decision to minimize the amount of moving parts (=hassle, things to get tangled in, etc.)
9.
by kanetw 3y ago
We've tightened up the numbers a bit, but it's pretty close to a honest amount. 4m would put us well into profitable S1 production + enough runway to develop the next iteration territory. > I've also seen a16z invest in fa
10.
by kanetw 3y ago
Our solution to this is to make the compute modular. In a few years you can plug in a new (off-the-shelf) compute module and have a state of the art PC again.
11.
by kanetw 3y ago
The Hololens 2's PPD are largely fake. There was a writeup somewhere but it's way, way below the stated number. Varjo is pretty high up there, and they're able to compete in the clarity department. But their headset is non-po
12.
by kanetw 3y ago
Yeah. Your average U-CPU (what you'd get in a 13" or 15" ultrabook, and what we use) has a TDP of 9-28W. That's well within the range of what a modern phone can boost to.
13.
by kanetw 3y ago
The ideal optical design is such that your optical spot size/MTF is matched to your pixel size in a way that * subpixels are blurred, and it's hard to see the boundary between pixels * you still have enough resolution to resolve t
14.
by kanetw 3y ago
It's probably safer than looking at a phone, but the most important reason is that your field of view/camera offset vs eyes is different than you're used to and it's easy to get into a dangerous situation.
15.
by kanetw 3y ago
You probably shouldn't walk outside with our headset on, but indoors, absolutely. Turn on passthrough and off you go.
16.
by kanetw 3y ago
Publicly accessible DNS resolvers are an awful idea. Don't do it.
17.
by kanetw 3y ago
I blackholed .zip and .mov in my DNS servers.
18.
by kanetw 3y ago
(SimulaVR dev) It's not wrong to say that in most cases, tasks are better solved without an FPGA. But when you need one you need one (or an ASIC if you have the volume and don't need reconfigurability)
19.
by kanetw 3y ago
We will. In this particular case it was easier to ship with Arch, but we still prefer NixOS.
20.
by kanetw 3y ago
For the auto booting variant, I used a normal display and installed everything (well, ssh and then ssh'd in and did the rest). The Simula WM needs a regular display, so I faked one with evdi. Rest is just a .xinitrc that launches Monad
21.
by kanetw 4y ago
SLVS-EC has some very minor issues when interfacing (DC offset compliance) which requires a hack in detecting when the link is up. And yeah, MIPI D-PHY is a royal pain unless you have native support (Xilinx, Lattice, Intel Agilex 5). C-PHY
22.
by kanetw 4y ago
I can't say much because NDA, but it's not the most difficult protocol to reverse engineer. Also, if we decide to make our own RX IP for it, there's a good chance I can open source it. Will have to have a lawyer look over the
23.
by kanetw 4y ago
I'm aware of event-based cameras and looked at them for Simula's SLAM, but last time I checked my distro they were fairly pricy (for a device like this anyway). I'll ask my contact how much they cost. The image pipeline here
24.
by kanetw 4y ago
Well in excess of human eye resolution, around 100 PPD at 2ft distance with a 28 degree FOV. Peak human eye res is 60 PPD.
25.
by kanetw 4y ago
Sure. You can either run a 2D WM inside Simula or use it with something like Virtual Desktop
26.
by kanetw 4y ago
It's kind of incredible how we can basically document our entire development process and people still go "it's a Kickstarter scam"
27.
by kanetw 4y ago
I don't have an XR2 devkit so I can only guess, but TDP-wise they seem pretty comparable. Obviously that doesn't include boost power etc and there's stuff integrated into the XR2 that we need to do on an FPGA, but overall I&#
28.
by kanetw 4y ago
No, absolutely not Q4. We need to update that, but Q1-Q2 23 depending on how things go with suppliers.
29.
by kanetw 4y ago
The compute pack is detachable, so you can decouple it and put it somewhere else. I think it's a less elegant solution overall, but it's an option (eg for supine computing or to lessen the head weight).
30.
by kanetw 4y ago
You can install any distro. Windows is doable in theory, we just don't focus on it.

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