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sebcat

1,241 karma · joined October 24, 2012

Mowgli could not help laughing when the Bandar-log began, twenty at a time, to tell him how great and wise and strong and gentle they were, and how foolish he was to wish to leave them. "We are great. We are free. We are wonderful. We are the most wonderful people in all the jungle! We all say so, and so it must be true," they shouted. -- Kaa's Hunting
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sebcat··on How does IKEA come up with names for its products?
No, they are slut
sebcat··on How I leared what a decoupling capacitor is for, the hard way
It's an easy test though and it can be an SMD component and some PUR-coated magnet wire or 30 awg single stranded kynar hookup wire.

Use a small amount of glue from a hot glue gun to fixate it when done, or epoxy if that's your thing. Avoid cyanoacrylate. Not always needed but I imagine a drone moves around alot.

Bodge wiring is a good skill to acquire - PCBs will not always be perfect. Maybe practice on something else first?

sebcat··on MOnSter 6502: a working transistor-scale replica of the classic MOS 6502
> Not using MOSFETs would make it faster, in theory.

My understanding is that the MOS 6502 was MOS, so MOSFET. Not using MOSFETs would make it less of a replica.

Implementing the replica in an integrated circuit instead of discrete transistors would lower capacitance.

The delay time is a consequence of the capacitance.

sebcat··on Radios, how do they work?
I was trying to say that a capacitor and diode (detector) is not a complete receiver.
sebcat··on Radios, how do they work?
Under what circumstances is a diode and a capacitor enough to make a radio receiver?
sebcat··on Accessing the Pinecil UART with Picoprobe
Doesn't the RP2040 require external qspi flash? What does that cost?

MCP2200 is ~$2.50 in single units and you don't have to deal with firmware or programming.

sebcat··on How to get coworkers to stop giving me ChatGPT-generated suggestions?
Assuming AI is at the level of average
sebcat··on How to attach logic probes to tiny SMD components (2021)
PUR-coated copper wire, .15mm diameter is pretty good. .1mm when needed. Use flux, good lightning and some (~10x) magnification.
sebcat··on Ask HN: Has anyone gotten complete, permanent relief from tinnitus?
Monarda is many plants. Any one of them in particular?

Will I get the same effect drinking Earl Grey tea?

sebcat··on FM radio wave-based early earthquake detection (2021)
VK2 is New South Wales, not sure what the seismic activity is there but they do appear to get earthquakes according to Wikipedia.
sebcat··on Ask HN: IP cameras that don't require an app or internet?
Still used a bunch of CRIS cores for ARTPEC-6 for scheduling scaler and trfm jobs and some other things, are they completely gone now?
sebcat··on The world's largest "radio" station (2005) [pdf]
2200 meter is LF (30-300kHz). Used mainly with huge coils and low power (1W EIRP). then there's VLF (3-30kHz). Then there's ULF (300Hz-3kHz) Then there's ELF (below 300 Hz), used by the stations in question. To put things into perspective.

Speaking of VLF, SAQ will broadcast on 17.2 kHz on July 2nd. You can pick it up with a soundcard directly (not using a DVB-T chip) depending on your location and use of antenna.

sebcat··on FlipperZero: 1 Month Battery Life with Firmware Update
See https://github.com/F5OEO/rpitx
sebcat··on Three Sisters (Agriculture)
You need crop rotation for beans at least. To lower the risk of parasites and deceased.
sebcat··on Three Sisters (Agriculture)
My experience is that it's hard to get right, messes with crop rotation and lower yield.

I've had beans overtaking the maize and I've had squash overtaking the beans.

YMMV.

sebcat··on Establishing a UART Root Connection to a TP-Link Wireless Router
If you're into electronics, having a couple of MCP2200 in your drawer is also handy. Gives you some GPIOs as well.
sebcat··on Cyclists now outnumber motorists in City of London
> you will not kill someone if you ride after a night drinking

You might however end up at the hospital doing that, or worse.

sebcat··on Iatrogenics: Why Intervention Often Leads to Worse Outcomes
Does intervention lead to worse outcomes more often than not?
sebcat··on NRC Certifies First U.S. Small Modular Reactor Design
Surely there are worse cases for a sub than this?
sebcat··on Finishing what you start makes teams more productive and predictable
You get a pretty good ratio by doing very little using only that metric.
sebcat··on Raspberry Pi Pico Hack Unlocks Two Extra “Hidden” GPIO Pins
From the Reddit thread the article is based on, OP says:

> I want to run an unmodified QMK firmware so I can keep up with updates without having to continually merge my changes into HEAD, and in my research with IO expanders I would have to rewrite the matrix scanning code.

sebcat··on Cat S22 Flip Phone
ITAR, described in the link, is one thing. There is also the Wassenaar arrangement[1].

[1] https://en.m.wikipedia.org/wiki/Wassenaar_Arrangement

sebcat··on Ask HN: Share your personal site
Also used by OpenOCD[1] for chip debugging and flashing.

[1] https://openocd.org/

sebcat··on Fred's ImageMagick Scripts
Not what you asked for, but related to the method you described:

"Image Retrieval Based on Using Hamming Distance"

https://www.sciencedirect.com/science/article/pii/S187705091...

EDIT: Here's a python package that does image deduplication. Not ImageMagick and no idea on its performance though.

https://idealo.github.io/imagededup/

sebcat··on Wine bricks saved the U.S. wine industry during Prohibition (2015)
Though there are cultures of yeast and bacteria where the bacteria breaks down the starches to sugars which in turn gets eaten by the yeast.

https://en.m.wikipedia.org/wiki/Q%C5%AB

sebcat··on This shouldn't have happened: A vulnerability postmortem
It wouldn't cause the problem in itself perhaps, but I find it a bit reductive to look at the type in isolation like that. Sometime, somewhere, someone will call std::vector<T,Allocator>::data on that vector and use the resulting pointer as the src argument to memcpy (or some other function), and someone else will make a change that causes an overflow of the dst buffer. Shit happens and code written in modern C++ also has bugs and some of those bugs have security implications.
sebcat··on Gitlab servers are being exploited in DDoS attacks
https://exiftool.org/ancient_history.html

    Sept. 26, 2008 - Version 7.44
           - Added read support for DjVu images
There were probably enough systems running perl 5.6.2 around 2008 to cause bug reports, or the code was migrated from an older piece of code and added to ExifTool.

It was not uncommon to manually ./configure, make, make install tarballs locally in those days, especially not on systems like Slackware so I can see it being possible to have old packages installed that were not automagically updated.

sebcat··on Explaining top(1) on FreeBSD
I did this a while ago. the .iso.xz came in at 22.1 MB and the .iso at ~80MB.

That's for a ro image with tmpmfs and varmfs[0], a minimal kernel, base and the packages nginx-lite, jansson, re2, curl, acme.sh and some services.

The system boots from an ISO into running nginx and hosting a basic network scanner[1] at a VPS provider.

I basically built from source with a custom SRCCONF[2], KERNCONF[3] and some other cleanup[4].

There may be easier ways to do it but it worked out pretty well for me.

[0] https://www.freebsd.org/cgi/man.cgi?rc.conf(5) [1] https://disco1.sajber.se/ [2] https://github.com/sebcat/yans/blob/master/tools/freebsd/vm/... [3] https://github.com/sebcat/yans/blob/master/tools/freebsd/vm/... [4] https://github.com/sebcat/yans/blob/master/tools/freebsd/vm/...

sebcat··on E-Ink Magic Calendar that runs off a battery powered Raspberry Pi
Target the high-end? There might be a demand for a device with an e-ink esthetic which takes care of, I don't know, planning the days of rich people? An actual need instead of a manufactured want? Or maybe the lower power consumption of an e-ink display can make it useful in other areas not yet identified instead of consumer products?
sebcat··on Melting ice patch in Norway reveals large collection of ancient arrows
Fimbulvinter (a long winter) was a sign of Ragnarök. Ice giants was not a sign.
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