Tube❄Time

@tubetime
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vintage computers, tubes, the MOnSter6502, cross-sectioned electronic parts, capacitors, and other detritus. coauthor of http://nostarch.com/open-circuits

TIL Kicad's builtin font is defined as a set of Kicad symbol libraries, which (mis)use symbol features like pins to mark out important locations that matter for fonts. Then a python script goes brrr to convert all those "component symbols" into a C++ file containing hardcoded glyphs.

Here's the latin capital letter A, for instance.

It's... quite cursed? I went into this to try and see if I could find an easy way to extract an approximate size of individual glyphs, and the answer appears to be "lol, lmao".

It's time for the Tube Time 2025 Retrospective! 🧵

that about wraps up the highlights. there's a lot more if you go through my Mastodon (and Bsky) backlog.

on to 2026! wishing you all a happy new year 🎆

and, wrapping up 2025, this December i've been reverse engineering the HP 16717 logic analyzer card. they tend to get corroded and they're hard to repair, so this should help folks out.

https://mastodon.social/@tubetime/115741254454906195

in November i reverse engineered a bunch of disposable vapes and put the designs online. they're quite hackable!

https://mastodon.social/@tubetime/115555385897273188

October was busy IRL so i really only had time for a fun meme.

https://mastodon.social/@tubetime/115460910142265494

in September, the IBM 1401 computer broke again, so i helped fix it.

https://mastodon.social/@tubetime/115233768349384485

finally, in August, i was able to reverse engineer the Raspberry Pi Compute Module 5! wow!

https://mastodon.social/@tubetime/115085637853254173

turns out folks were retrocomputing even in 1976.

https://mastodon.social/@tubetime/115042807696749887

Check out this chip with a tiny window!

https://mastodon.social/@tubetime/115041751407817367