Electronics Projects (by alaric)

So, my electronics workbench is a mess.

This is abundantly clear in the picture from my blog post on redesigning my workspace; the awkward layout is certainly part of the problem, but a deeper problem is that I don't do many electronics projects. So this big workbench is rarely used for its intended purpose, and thus accumulates junk, and thus isn't very inviting to start projects at, which adds to the fact that I'm a bit edgy about STARTING electronics projects, and a vicious cycle has set in...

The only electronic projects I did lately were the 12 volt DC power distribution system for the van and a 9:1 impedance transformer, but those were mainly mechanical builds; the electronics were trivial.

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Amateur Radio Law (by alaric)

The radio spectrum is heavily regulated worldwide. This is because some uses of radio are matters of life and death - communications between ambulances and fire engines, air traffic control, radio navigation, GPS, distress calls from ships, military operations, aircraft/shipping radar, that sort of thing. It's easy to interfere with radio services by just happening to transmit radio waves at the frequency they're using - even accidentally, by a tuning mistake or a poor-quality transmitter that leaks energy at random frequencies - so there's a bunch of laws regulating radio transmitters in every country.

Basically, they trade off various freedoms. Operating a radio transmitter can generally be done using one of three legal approaches:

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Command Line Interfaces (by alaric)

Yesterday I saw this thread on Twitter by @thingskatedid about Kitty, a featureful terminal emulator.

I use the terminal a lot. My normal working environment is:

• herbstluftwm
• emacs
• firefox
• thunderbird
• Lots and lots of terminal windows

Up until now, I'd been using alacritty as my terminal of choice, after frustrations with getting xterm to do unicode properly, but I've moved over to kitty now - as far as I can tell it's a superset of alacritty, at least for features I actually use.

So, why was I excited about kitty? Having proper graphics in the shell is a tiny step closer towards what I'd really like to have, but perhaps as far as can be done without ripping up a whole lot more infrastructure... Let me explain.

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An actually usable voice assistant interface (by alaric)

Ok, this is going to sound a bit weird, but I had a dream last night and part of that dream as an actually usable voice assistant system (as in, Google Assistant / Alexa type of thing). I woke up all excited about this, so I need to write it up so that I can see if it's actually a good interface when I come back to it in few days, or just dream-hubris... Read more »

Pictures from Space (by alaric)

So the International Space Station (ISS) contains some equipment that's part of a project called ARISS, or Amateur Radio on the ISS.

One of the ARISS projects is occasional transmissions of images via SSTV, or Slow-scan television - basically colour faxes sent via radio.

Anyway, a few days ago, I saw that there was an SSTV transmission scheduled, and the ISS would be passing over England at times I would be able to try and pick it up, so I gave it a go... Read more »