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:
https://github.com/f0x52/LiPo-module
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)
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)
⚠️ READ BEFORE FOLLOWING ⚠️
if i don't know you from elsewhere (under same nick), shoot me an introductory DM first (following back is fine)
I do anarchist tech stuff and run free services at https://pixie.town
I program, solder rgb led thingies, and fly fpv quadcopters
en: they/them
nl: die/dies (langzaldieleven.nl)
“i don't trust like that”
not a furry, actually
Extreme coffee-out-of-a-wineglass Energy
something something trans list stop scraping bios
and now a word from our sponsors (screenreader warning it's zalgo)
T̀ͧ̓̑͐̓̍̂̏҉̴̷͚̦̤͙̜̖͙̝͟ợ̵͈̗̮̲̥͕̼̩̭̞̙͉̆ͮͧ̉̒́̑̍̋ͭ̌ͭ̒̉́̕͟ ̐̅̈́ͯ҉̸̴҉̹̟͕̖̠̟̤͕į̸̙̮͓̤̠̘̫̦̥̣̻͚̣̎ͭͯ̋̉͝n̔̄̏̈́̃̇͛̂̋̇̐́͘͝҉͙͔̠͇̖̤̹̭̱̪v̴̴̛̘̠̰̹͚̱͉̳̘̥̞̳̪͈ͥͭ̅ͥͦ̀͛̔̃̃̎͋̋̎͐͌ͪ̚͟͢ͅö́́̎ͬ̔͑̆̃̅̒̿ͪͯ̓͏̞̱̜͍̬̗̹̫̝̪͓͕̳̬̰͘͝kͥ̒ͣͦ̌͛̃͒̀̿ͣͪͤͬ̍ͮ̚̚̕͝҉̹̰̟̰̻̻͍̠̗̳̬̬̬̞̟̹̩͇́͜ẹ̴̡̨̱̹͍̯̱̗̗͍̬̐ͣ̑͑̐̓̈̑ͥ̅́̇̃͒̀̃̂́ ̨̛͖̬͇̣͔̼̥̬̝̥̣̭̝̪͎͈̌̅͆̉̀͘͜ͅẗ́̄͊̌̍̆́̿́̊ͣͮ̅ͥͩ̔̏͏̧̳͎̥͈ͅh̴̴͇̻ͧ̍̐̈͐̎͛́̀̽̃̒̔͢͢ȩ̸̶̶̟̗̮̺̭̥͕̭͎̺̙͎̖͔ͪ̑͛̓̅ͪ̄́ͧ͡ͅ ̡̧͇̤͚̻̬͉͔̥̫̟̙ͮͩ͌̿́̆͋͜h̵̨̭̰͎̭̱͊͒́͒͆̎ͮ̈́̆ͪͧ̚͞î̛̦̞͓͖̭͈̮͔̩͙̱̖̞̳̥̦̩ͭ̂̏͒ͨ̃̿̽̓͑ͫ̕͝͡vͧ͋ͪ̌̂̑́͌̂̒͑ͮ̋̂ͫ̈́҉̹͜͢ȩ̡̖̯̞̺̭̗͔͇̻̤̼͈̙̞͉͙̈ͤ͊ͨ̀̆͆͒̓̄̿ͭ̃̚͜͝͡-̶̪̪̠̝̜̯̜̹̭̯͎͍̲̱͉ͪ̏͒̊ͫ̀̈͘͡m̸̪̘͙̰͚̗̳͕̟̖̿̌͐̔̐̈̽̃ͯ̅͢ͅͅi̸̷̧̛͍̝̦̫̮̤̐͑͗̏ͬn̡̨͆ͩͤͫ̔̈́̈́͊͐̂͛̀̚͞҉̜͍̝̰̱͚̜̹̞̝̞͈d̢̫͕͚͕̥̰̝͆͗́ͨ͑̈́̓͜ ̡̩̜͎̳͎͂̓ͫͭ͐̀͡ȑ̷ͭ̑ͪͭ͋͢͏͕̳̟͜ͅͅe̴͌̅ͣ̾͒̔́̊̔ͭ̅̄̇͏͎͉͈̤̙p̀ͥ̈ͨͩ͛ͥͣ͗̄̈́̚҉̢͔͉͍̹̮͉̺r̵̸̡̩͎̱̟̺̟̞͈̯̯̪̹͂́ͣ̐͑̒̒̀ͧͩ̿ͮ̕͞ě̵̡̱͈̜̯̳͍̝̦̜̫͈̜̗̘̪̪̓͆͑͋ͮͯͪ̅̂͐̔̆̃ͫ͑̾͒͢ͅş̶͓͉͚̜̪̜͓̘̻̃̔ͨ́̀ͅẻ̵͇͈̮̝̠͖͍̫͉͓̪̠͔̬͕͛̊͐̎̓̽ͫ̌ͧ̅̿́͘n̛͚̺͈͍̰͉͙̤̘̺͖͉̤͖̈͑͑̍̅ͪ̎͂́ͦ̒ͣ̋̆̄̄̍̃̊͟t̵̛͙͚̥͇̫̻̞͖͕̰͈̩̰̱͉ͣ̃ͫ̋̍̈ͥ͗̎ͭ͋͜i̵̡̤͇̣̰̦̟̭̮̩̲͔̭̟̖̹̙ͥ̆̋ͫ̓͌̒̾̍̄̾̎̂͂̏̇ͩ̚͢n̶̮̹̤̻͈̙͔͎̦̟ͫ̀͌͛̋̌̽̀̓̂̕g̷̣͖̠̩͈̲̥͍̦̘̺̏̍͛͋̎͛͒ͪ̇ͮ͠͝ ͦ͂́̿͐̅̌̊̌̉̍̀҉҉͈͖̮̩͎̮̬͖c͖̬̠̫̠̫̗̉̾͋͒̏̄̈́ͬ̊̓͘͝h̴̷̨͉͖̱̗̪̣͕̮͓͕̺͖͈͙̥̬͓̟ͣ̏̀͐̀́̍ͪ̋͒͐ͪ͐́̕a͍͈͉͎̥̠͍͛ͭ͛̃ͫ͒͋́͟ö͙̻͔̙͖̰́̋̑́͜s̶̸̫̖̫͇̣̻̺̹͔ͧ͐̂̈́ͮ͋̌͠.̰̯̞͎̗̺̠͔̫͍̖ͮͦ̒̏̈̾ͭͧ̉͘͢͠