Cosmic Meow Background

@[email protected]
389 Followers
106 Following
2K Posts

Adventures 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.

main@ln
pronounsshe/they
Show threadCosmic Meow BackgroundFeb 16

time to get the lead frame epoxied up and then solder it. ring has been ground away a few um and covered with a thin layer of resin.

also, does @CursedFootprint accept handmade entries?

Cosmic Meow BackgroundFeb 16
„i‘m new to analog electronics, am i doing this guard ring stuff right?“
Show threadCosmic Meow BackgroundFeb 15
wife did an amazing job fixing my fuckup.
tomorrow test and then put resin on top.
Cosmic Meow BackgroundFeb 15
vias of the QFN exposed pad have been ground back to In1 and backfilled with UV resin and ground down again to make it flat again.
now 13 ground pins which were only connected via the pad to ground need to get a new connection to ground around the chip.
the drill holes are 0.4mm for scale.
Cosmic Meow BackgroundFeb 9
a well annotated schematic makes everything better.
i just wish kicad supported complex math expressions in eeschema. otoh i could just add a graphic with nicely typeset text instead too.
Cosmic Meow BackgroundJan 29

one more from the TBD pile before lunar new year. finally want to characterize this circuit with all the bug fixes applied and routing simplifications done.

just need to finish picking the rest of the parts and of to the board house it goes.

Cosmic Meow BackgroundJan 28

okok, now it's done and off to the fab. no more changes.

check it out at https://codeberg.org/tachiniererin/sensacle if u want to.
#electronics #oshw

Cosmic Meow BackgroundJan 27

alright, i'm done. just need to add some silk to the back and it's good to order.

added a few more features (supply voltage monitoring, two SSRs on GPIOs, LEDs, user defined button) and i'm happy with it now.

it has grown a bit beyond a simple EVM and more into a prototype for a standalone thing but that's also nice imo.

oh and everything fit into two layers. might do a 3.3V power layer tho to simplify things, gotta do *something* with all of those six layers.

Cosmic Meow BackgroundJan 26
ok, this round of layout yields a much better result. first round i was just incredibly unhappy with, but now it all falls into place, for the most part. just a few more parts and it's done (again)
Cosmic Meow BackgroundJan 22

alright, finished routing it. i don't like the layout but this is a functional evaluation board, not a finished thing.

now: go through the schematic and the pcb checklists to make sure i didn't mess up too much, get another pair of eyes to look over it and off it goes to JLC for partial assembly.