ln(x)ᵉ @ln@chaos.social

due to me being a mess, i took a wrong train and had to spend an hour more at home than planned. but that gave me the chance to pick up the boards i missed in the morning.

the surface finish and mask alignment is not good but who cares, they'll do just fine :3

i'm just gonna leave this here, uwu

After i missed the other boards earlier today, i got some perfect purple PCBs from oshpark :3

It's a magnetic current sense board with an Aceinna MCR1101. Just need to order the ICs now and get to assembling one or two.

in this episode of elen's strange drinks: hell energy latte.
it's a bit disappointing, it tastes just like canned coffee. but has 40mg/100ml caffeine. that's it. no weird and horrible tastes... but it's a nice change for oncr :D

went to a posh app store, they had signal *and* sudocream!

There's some strange fruits growing in those trees.

one of my favourite ones is this. you can't see how incredibly tired i'm in this one. also i almost fell asleep on the floor a few days prior to that because Zoé and i were assembling boards all night.

we put soooo much effort into all this. and it worked. kinda.

look what the postman dragged in! multimeter says 4.11V, so looks like they're pre-charged.

now i need to finish my coin cell charger board. these should be 120mAh if i remember correctly.

oh and they are totally adorable and chonky at the same time, i just love em.

Ever wondered what a wasp at 140km/h looks like?

do you ever just get carried away and a few hours later you find yourself in front of a schematic for yet another dc/dc? just me?
thought as much...

need to pick some cap/resistor values still and add some fluff, but it's looking good.

i wish i had some money to upgrade my setup for taking pictures through the microscope, but a smartphone has to suffice for now.

it's likely the chip on a lead-frame, there's a BGA variant now which is chip-scale and smaller too.

if you stare too long into KiCad you you'll start to make shitty block diagrams with it.

anyways. i put a lot of thought into it today as to which features i really need to have and what would be nice to have and i'm happy with it now. i'll start layouting it tomorrow :3

finished the boards and made component placement and bom files for JLC. i want to make some more stuff to order too.

also went to the post office earlier, check it out! legs for days :D

here's the second revision of the routing. rotated some components and reassigned some signals and it was soo much easier now to do. also added a Qwiic connector footprint instead of having pins for the extra I²C. the pin headers are properly spaced for breadboard use too.

Felt cute, might finish routing boards later :3

Aaaaand done. And by done i mean i should re-do the whole thing because now i know where the problems are. And i can assign the pins better to suite the layout and not cross all the USB signals. but it's enough for today :3

i'm pretty happy with the placement now. a quick break and then i'll route it.

current progress of the PD sink board.
i decided to make it a bit bigger so the M3 mounting holes have a 30mm spacing. placing still needs a bit of work, but i'm mostly happy with it.

there's also a lot of space still for future revisions with possibly more features.

i actually just wanted to make the symbol and not a whole schematic at once...

anyways, not quite finished but it was a fun exercise. the Propeller 2 is a neat chip.

chonk.

it's an ON Semi 932BR package (https://www.onsemi.com/pub/Collateral/932BR.PDF) with just a few thermal vias now ^^