u/dontreadthisnickname

Xingam e ofendem todo mundo e agora tão mendigando votos KKKKKKKKKKKKKKKKKKKKKKKKK

Tô montando literalmente só com componentes que tenho largado em sucatas, peguei o design do Searle, mudei umas coisinhas (ele usa uma SRAM de 128KB, pra ter os 64KB de RAM, como eu tinha 8 chips de 8KB, taquei um LS138 pra pegar os endereços A13, A14 e A15 e decodificar pra 8 pinos pra ativar qualquer um dos chips que o processador, um Z80 SECO de 4MHz, vai acessar), ainda tá faltando fazer a parte de alimentação, ligar um adaptador de IDE pra compact flash (sim, até HDD esse idoso vai ter), pra guardar o CP/M 2.2, é tão raiz que nem entrada pra teclado e mouse tem, nem saída de vídeo, é tudo por serial (no futuro provavelmente vou trocar o Z80 de 4 pra um de 8MHz, e fazer uma expansão pra botar um chipzin de áudio, um VDP pra vídeo, e porta pra teclado), o chip de UART é outro porque não tenho SIO do Z80 então vai ser aquele ali mesmo, se tudo der certo domingo tá funcionando, e aí faço um case pra ele com ventoinha e essas coisas.

Talvez também eu tente fazer e montar um com um TMS9995 e Motorola 68000 que tenho sobrando, mas esse aqui é com certeza o computador mais seco que já montei na minha vida

Edit1: vou ter que adiar esse projeto porque a gambiarra que chamo de gravador de EEPROM não funcionou (é um Mega 2560 soldado ao chip de ROM), e por isso vou ter que provavelmente pegar um Williem EEPROM burner ou aqueles TL866, mas antes vou testar se um capacitor no EEPROM ajuda porque já tive problema assim com SPI flash

This thing has proprietary connectors as always, so nothing that P2 connectors, wires and little soldering can't do, had to also use alsa a52 encoding on Linux and some hacked drivers on Windows so every thing that outputs at LPCM 5.1 gets encoded then sent, otherwise would only output regular stereo, also TV does not support DTS 5.1 on HDMI ARC so I am stuck at DD, at least it's not as crackhead as my previous setup, with a analog amp (third photo, PSU is that black box thingie, has a 17v transformer inside with a bridge rectifier PCB plus regulators) that required symmetrical power supply and sounded more like fart noises and had 3 3.5mm to RCA outs, wired to a 6 input powered amp that had a non working subwoofer amp (I could fix it but never got myself into, too lazy for that)

As a last effort I decided to clean the filament entirely and unclog the nozzle again, and it seems that everything ended paying off, now I just need some upgrades to it to get even better quality, but for a starting point i'm actually very satisfied, always wanted a 3D printer, now I think I finally got one, hopefully after everything i learned I can help other people here even though i'm still a beginner

keychain is for a friend, asked for a HP choosing hat, printing isn't that perfect still but for a 3D printer that was sitting in storage for years, previous owner had cut the extruder wires and cables, had to do a lot of work but everything went right in the end it seems, thanks to this subreddit and a friend of mine, we basically spent weeks working on this.

Got this Ender 3 v1 from a friend's parent for cheap, and it has this strange issue, when printing it can't push the filament forward but if I go and manually extrude while not printing anything it does spill out molten filament normally, is this a slicer misconfiguration or any other issue? Gear seems to grip fine since it even creates gear markings on the filament when it pushes it in, this is my first 3D printer since a new one is too expensive for me now, but I'll buy a new one whenever I can, I tried unclogging burned filament, changing filament, slicer settings, sometimes it even makes a noise when feeding, any tips or ideas on what to do? I'm thinking also on upgrading the extruder setup to a direct feed instead, hoping this issue stops with that, also, any upgrades that are worth it? board is a v1.1.4, but I'll later upgrade to a v4.2.7, I do have one but MCU got toasted because I tightened the hotend thermistor too much and it shorted the ADC, at least it works with the older one, I'm using OrcaSlicer with basically the generic configs for this printer, been spending days on trying to solve this but never was able to get any progress.