me when a project has <5 power rails: i don’t understand why people use power modules, it’s so easy to do
me when a project escalates again: what do you mean 11 rails, fuck this shit. i wish there was a module for this…
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@cmb@cathode.church
mastodon 4.5.19+glitch.cathodeAdventures of Business Catgirl
I'm a cat who accidentally builds electronics now for fun and (again) for survival in a capitalist society.
Especially interested in all things precisions analog electronics *baps the ppms*.
Feel free to follow, acc is just locked because of spam follows.
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Joined February 19, 2021
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TIL i can just type "−2=−1.22×(x+500k)/500k" in qalculate to solve for feedback resistors.
now i finally don't need to shuffle the equation around in my head anymore :3
hey #electronics #lazyweb, does anyone know a *negative* LDO that has sub-10µV rms output noise and is not from ADI?
i'm looking for parts that aren't as expensive as the analog ones and closest thing i got is TPS7A30 with 15µV rms
one day i need to take inventory of my voltage references, but not today *puts ref54 sample baggie into drawer*
*finds ref70, ref80, adr1001 while looking quickly*
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@whitequark@social.treehouse.systems @ar@is-a.cat fully automated luxury gay space communism starts with fully automated. we’re doing our best getting there but we also had to start somewhere :3
„honey, i bought a new deep fryer, it even came with free oil!“
oh huh, the spice-crypt project is gone without any notice as to why...
there's still mirrors and debian has it but so strange.
let's see if this sense resistor layout (https://www.analog.com/en/resources/analog-dialogue/articles/optimize-high-current-sensing-accuracy.html) makes a difference with generic current sense resistors
doing @fafo@social.fa-fo.de logistics, looking at what stuff from the lab we should take.
big ass bottle of carbon-tet in the corner.
yeah, not taking that one.
edit: sorry, false alarm, it’s the wrong tet. tetrafluoride not tetrachloride.
„born to shit, forced to sputter“ lives rent free in my head and i hate it (was on the topic of sputter coater)
saw a zirconium endmill which makes me think of the beryllium foil holder
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just got offered an emco cnc lathe with tools but broken controller for 300€, send help (it‘s in the first upper floor, no cargo lift)
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and now with all the part numbers for JLC and generic added. the important DRC violations have also been fixed. just needs a round or two of checking everything and also cleanup.
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2441 pads, 1633 unrouted. ye gods what have i done...
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@q3k just make sure it‘s far enough from the current tech blast radius, otherwise you might have to ask yourself the same question a few years later again
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or... maybe run away screaming after all, hmm...
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@true_facts@cathode.church good question, depending on what is getting fried there’s different power sources that can be used to achieve thorough heating.
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@lethalbit@chaos.social don't worry, i'll ping you for the next round, i need to fix a *lot* :D
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@equinox@chaos.social well, i wanted to rip it all up anyways :D and better now then with a dremel later.
and yeah, i can just use a load-switch and tie it to the fpga nrst to create that net, that's probably the best solution.
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@equinox@chaos.social it's already a part grave, i can fit in one more if it takes up less space than the discrete solution
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@equinox@chaos.social oh yeah, good catch, i definitely either mirrored the supplies once too often or once too few. thanks 😬
gonna update it real quick and push the fixed schematic.
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@ldcd@social.treehouse.systems i would probably go with the TPS7A3901 again, i've used it in such a design before and it's <1€ when sourced from LCSC
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@Thunderbolt93@chaos.social oh routing isn't the issue, it's placement. routing will be easy once i place everything in a way that it all falls together.
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@leo@60228.dev there‘s an ultralibrarian part so i‘ll start with that while double checking every single dimension
Self-OH: "that's LLM stealthing"
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@crystalmoon@chaos.social this here: https://en.wikipedia.org/wiki/Carbon_tetrafluoride R14, an old refrigerant gas
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@dlharmon@chaos.social thanks a lot! yeah, definitely need to add a bunch more ground vias and i'll try to find a better cap for that one. i haven't quite started on full part selection yet and will keep that in mind.
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@gsuberland@chaos.social later in the week is early enough, i'm probably not ordering before the weekend