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pcbs arrived owo
time to solder one under the microscope and see if they work

remembered I took this good pic when I just got my new Xiaomi

btw I use Arch :P

Hackerspace got a new Vinylcutter, so I made these dual-color Arch stickers that turned out suuper well

if anyone would like to critique my very first PCB design:
silkscreen is a mess I'll fix later but all the components/copper should be done:
github.com/f0x52/LiPo-module

I'm now turning this into a pcb module, starting with the schematic.
Adding USB-C wew

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and here's the schematic, the TP4056 is a great simple chip. I used 2.2K ohm for Rprog, but with 1.2K it will charge the fastest (1A)

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so tonight I did my first real SMD soldering, on a pretty challenging chip :D

I desoldered the TP4056 ic from a dead SHA2017 badge, then made everything work on the smd-protoboard of the eth0 badge.
Great fun learning to do tiny soldering, and getting used to working under a microscope

It charges a single-cell lipo, and gives the charging status over a wire, something the prebuilt modules can't (they connect it to an onboard led instead).

Next up will be adding a voltage divider to get a battery voltage reading, and throwing this all into kicad (also a first for me)

So I did some speedtests for my image formats.
Raw PNG as bytestrings is definitely the fastest by far, but takes a lot of space.
Then there's various ways of decoding my run-length-encoded strings, by keeping the character counter as an integer or as a string. (more explanation in replied toot with cw)

by the way, I hope to have this as a finished tilde.industries product soon, to be shipped before christmas so you can buy one for yourself or as a gift :D

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