Posts
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Following
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Linux Kernel security developer, working for Microsoft. Also W7TXT. Views are my own.
Topics: #Linux #kernel #security, #amateurradio, #RF, #hamradio, #electronics, #science, #radioastronomy, #physics, #space, #arduino.

📡 https://w7txt.net/
🐧 https://blog.namei.org/
☠️ https://www.facebook.com/w7txt
jmorris
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brauner@mastodon.social

Christian Brauner 🦊🐺

I'm done writing groff.
https://github.com/brauner/man-pages-md

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jmorris

James Morris

It's been a while since I looked into different #fediverse clients. Is there a good threaded web based client, or cross-platform app?
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jmorris
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RichiH@chaos.social

Richard "RichiH" Hartmann

Reply to @RichiH@chaos.social

@fosdem closing talk. I promised not to blur the sides photos this time ;)

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jmorris

James Morris

Reply to @azonenberg@ioc.exchange
@azonenberg @oshpark @rgilton and this is why specialized technology is expensive, which I think many people don't understand
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jmorris

James Morris

Reply to @jmorris
@skykiss seems like we've almost reached the end of the end of history, what is next?
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jmorris

James Morris

Reply to @skykiss@sfba.social
@skykiss also, the downstream effects will mean many more deaths in the future, in Ukraine and beyond.
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jmorris

James Morris

@kellylepo great story, which I'm assuming is getting very well known now

RE: https://astrodon.social/users/kellylepo/statuses/111881078696230611
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jmorris

James Morris

Reply to @azonenberg@ioc.exchange
@azonenberg @rgilton as a hobbyist, it's interesting to see concrete costs of professional level development. I just got 3 copies of a prototype board made by @oshpark for $8, including shipping.
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jmorris

James Morris

Reply to @cosmos4u@scicomm.xyz
@cosmos4u great to see this actually happen
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jmorris

James Morris

Reply to
@stefanfendt good to know. I have seen main circuit RCDs for sale in the US, but they are in the hundreds of dollars and I don't know if or where they are required. No way a typical DIYer here is getting into that level of expense and expertise -- I assume any normal GFCI will trip on significant inductive or capacitative loads. People here expect such components to be very inexpensive.
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jmorris

James Morris

Edited 1 year ago
#electronics Pro Tip: do not apply -30V DC across the Vin+ and Vin- pins of INA169 current sensor chips. They don't like it.

Great high-side alternative to low-side digital current meters, fwiw:
https://www.adafruit.com/product/1164
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jmorris

James Morris

@g4dbn decent antenna setup

RE: https://mastodon.radio/users/g4dbn/statuses/111865540448497761
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jmorris
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bluca@fosstodon.org

bluca

Reply to @bluca@fosstodon.org

video recording of my first talk, "Soft Reboot" is already online: https://video.fosdem.org/2024/ub2252a/fosdem-2024-3282-soft-reboot-keep-your-containers-running-while-your-image-based-linux-host-gets-updated.av1.webm

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jmorris

James Morris

Reply to @gnu2@gnusocial.jp
@gnu2 I can get by with just sarcasm
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jmorris
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LinuxSecSummit

Linux Security Summit 🐧

Reply to @LinuxSecSummit
🎟 There were some issues with the CfP closing in the wrong timezone: if you were unable to submit your proposal due to this, please use this secret link: https://sessionize.com/linux-security-summit-na-2024/?e=7aa558
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jmorris

James Morris

Reply to @penguin42@mastodon.org.uk
@penguin42 that’s why we just mentioned the one 3 phase I’d seen. I don’t understand it in general.
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jmorris

James Morris

Reply to
@stefanfendt this is what I'm referring to, 480v with all 3 phases shorted together, https://www.youtube.com/watch?v=kXO9GJXF1kg
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jmorris

James Morris

Reply to
@stefanfendt there are RCDs (GFCIs) in the US on many outlets, especially near water or outside.
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jmorris

James Morris

Reply to @praxiscode@mastodon.online
@praxiscode yeah, it was not fun getting that pin out.
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jmorris

James Morris

Reply to
@HopelessDemigod yep, I have wondered about meteor scatter, which can provide 24/7 coverage in the range 500km-2300km if set up properly and also using burst mode comms. Very low bandwidth, but it doesn't depend on any fixed infrastructure, and is also resistant to nuclear effects. HF skip paths will be blocked by ionized air where detonations happen, but VHF will pass through.
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