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privatelypublic commented on Mic-E-Mouse – Covert eavesdropping through computer mice   sites.google.com/view/mic... · Posted by u/davekeck
privatelypublic · 2 months ago
Lets ignore the open source FUD in the diagram.
privatelypublic commented on BYD builds fastest car   autotrader.co.uk/content/... · Posted by u/trextrex
brianwawok · 2 months ago
Well you can see reports of people drag stripping teslas, and comparing speeds at 100 vs 90 vs 50% charge. Whatever the reason, you do slow down.
privatelypublic · 2 months ago
Apples to broccoli comparison. Besides what I mentioned being optional (I'm sure it has downsides, probably cost), comparing road legal cars with a supercar is... interesting.
privatelypublic commented on BYD builds fastest car   autotrader.co.uk/content/... · Posted by u/trextrex
eptcyka · 2 months ago
For a top speed run, cornering ability is next to useless. You need grip to put down the power and be stable at speed, the corners taken for top speed runs are fairly wide. The bigger issue here is for how long can a BEV sustain max power output - it can deplete its battery in 2 minutes. EVs also can only produce top power whilst battery is at top voltage, since draining it drops voltage, max power drops with charge levels. The tyre grip itself is fine, the issue is tyre durability - they can usually last less than 20 minutes at top speed.

It is an impressive feat of engineering to get to a vmax record in a BEV.

privatelypublic · 2 months ago
I'll need evidence of "Top power at Top Voltage." Since so little capacity is at that part of the curve, It'd make sense to design around (as in avoid, not feature) it rather than use it.

I suspect theres inductance and capacitance enough that even if the motors can't handle the voltage, it can be "clipped" until the pack comes down. (Especially since fmu these are 3phase AC motors, the motor driver is already regulating voltage and current to produce whatever the optimal waveform is)

privatelypublic commented on Fire destroys S. Korean government's cloud storage system, no backups available   koreajoongangdaily.joins.... · Posted by u/ksec
fredoralive · 2 months ago
That may not be a perfect answer. One issue with fire suppression systems and spinning rust drives is that the pressure change etc. from the system can also ‘suppress’ the glass platters in drives as well.
privatelypublic · 2 months ago
I'd be interested in if you can even use dry fire suppression on the 5th floor of a building.
privatelypublic commented on Self-hosting email like it's 1984   maxadamski.com/blog/2025/... · Posted by u/xmx98
dugite-code · 2 months ago
I've been self-hosting my email for over 10 years now (I'm going to link a bunch of my old comments on old email HN threads). I have fallen back to using Amazon's SES to send because all of Digital Ocean's IP blocks suddenly got marked as bad and I don't have enough volume to improve a new IP reputation - https://news.ycombinator.com/item?id=39891262, https://news.ycombinator.com/item?id=38471262

I use Gmail as a free spam harvester to train my own spam filter - https://news.ycombinator.com/item?id=38843288.

But as others here have suggested greylisting is extremely helpful in this space as legitimate servers should always retry. Well only my power company is the exception and they will fall back to sending paper bills, but even Gmail falls foul for them. It's also one big reason I'm not worried about up to a week downtime. But I have two email servers, a receiving and a storage server, the receiving is cattle and I car re-deploy in minutes if needed. - https://news.ycombinator.com/item?id=38512732

On greylisting I would say using https://github.com/stevejenkins/postwhite (even if it's very old and not actively maintained) has proven very important for the annoying 2FA emails, I strongly contend that email isn't suitable for this use case but that's another conversation)

privatelypublic · 2 months ago
Long winded admission that you might as well pay for google's email service.
privatelypublic commented on Clavier: An FPGA-based mechanical keyboard with USB hub and comms interfaces   github.com/lsartory/Clavi... · Posted by u/zdw
crote · 2 months ago
Because you can? It looks like a great project for getting started with nontrivial FPGA design.

Programming-wise I'd say full FPGA is less useful than QMK. Doing a direct 1:1 mapping from key inputs to USB HID report isn't too bad to do in an FPGA, but dynamic behavior like macros, layers, leader keys, mod tap, auto shift, and so on are significantly easier to implement in a regular programming language. If you want flexibility you're basically forced to have your FPGA run a soft core, so at that point why not go for a regular MCU?

In theory you could make an argument for lower latency, but that doesn't really apply when you're limited by USB 2's 1000Hz polling rate while some off-the-shelf MCU-based keyboards use USB 3 for 8000Hz polling.

privatelypublic · 2 months ago
Yea. Fun, but not optimal for a product. 1000Hz is already comically faster than any human muscle reaction.
privatelypublic commented on Toyota runs a car-hacking event to boost security (2024)   toyotatimes.jp/en/spotlig... · Posted by u/octagons
burnt-resistor · 2 months ago
IIRC, many TPMS systems run as CAN over IP, basically giving unsecured network access to a car if it thinks it's talking to a TPMS. Granted that some/most these sensors typically have to be "paired" with a car using a scantool (sometimes), but IIRC, some are self-pairing creating a vulnerability where the legit sensor could be replaced with a hostile one. Also the possibilities of spoofing, sniffing, and/or packet injection seem real too.
privatelypublic · 2 months ago
I know the receivers are often in a vulnerable position. But, on my 2008 era car- the code I've seen for SDR decoding is a broadcast MAC, pressure and a temp value.
privatelypublic commented on AMD's EPYC 9355P: Inside a 32 Core Zen 5 Server Chip   chipsandcheese.com/p/amds... · Posted by u/rbanffy
mtoner23 · 2 months ago
For our build servers for devs we utilize roughly this setup as a ram disk. It's amazing. Build times are lighting fast (compared to HDD/SSD)
privatelypublic · 2 months ago
I'm interested in... why? What are you building that loading data from disk is so lopsided vs CPu load from compiling, or network load/latency(one 200ms of "is this the current git repo?" Is a heck of a lot of NVMe latency... and its going to be closer to 2s than 200ms)
privatelypublic commented on Windows 7 marketshare jumps to nearly 10% as Windows 10 support is about to end   neowin.net/news/windows-7... · Posted by u/sznio
happymellon · 3 months ago
The fact that this is even brought up as a solution really speaks to how bad Windows is.

https://www.microsoft.com/en-us/evalcenter/evaluate-windows-...

> after you install Windows 11 IoT Enterprise LTSC Evaluation, you won't be able to use the recovery partition on your PC to go back to your previous version of Windows.

Yikes.

privatelypublic · 3 months ago
That's routine. Windows generally ends up nuking the OEM partitions if you do golden installs.
privatelypublic commented on Mind the encryptionroot: How to save your data when ZFS loses its mind   sambowman.tech/blog/posts... · Posted by u/6581
1oooqooq · 3 months ago
let's all agree sending incremental data to something that settings were changed, without any error, is a bug
privatelypublic · 3 months ago
Except, zero knowledge replication is why ZFE native encryption got funded. I believe it was Datto specifically.

u/privatelypublic

KarmaCake day363June 11, 2025View Original