GB-Link USB to Gameboy Link adapter for Gb, Gbc, Gba Online

This is an adapter to be able to play the original Gameboy Tetris multiplayer over the internet at tetris.gblink.io. It also allows for pokemon gen 1-3 trading over the internet, Sending a multiboot file from a web browser, emulating a GameBoy printer, among other projects!

Client software (web clients work on PC and android!):
Tetris web client: https://tetris.gblink.io
Multiboot web utility: https://multiboot.gblink.io
GB Printer web emulation utility: https://printer.gblink.io
Pokemon gen1-3 trading web client: https://pokemon.gblink.io
Pokemon gen3 Battle, trade, record mixing, https://www.celi0.link (currently requires separate firmware https://github.com/Celio-Link/Celio-Firmware/releases)


GB-Link Zero adapter has a smaller footprint and comes with a 3D printed case resembling the original DMG. GB-Link Zero also features LED status light to show connectivity status. Red buttons press the Bootselect and the black button presses the reboot button. As a bonus case is also glow in the dark!

NOTE: The GB-Link Zero DIY kit requires advanced soldering. If you are not already comfortable with soldering please purchase a completed version. Instructions for soldering the GB-Link Zero can be found at https://hackaday.io/project/195920/instructions.

GB-Link Discord for support/finding a game
https://discord.gg/F9vcERKPHg

This project is compatible with the following firmware:
https://github.com/starlarkus/GBLink-Firmware/releases (Primary firmware with all functionality)

https://github.com/starlarkus/gb-link-firmware-reconfigurable (GB/GBC only, No GBA)
https://github.com/Celio-Link/Celio-Firmware/releases (For gen3 trade and battle)

Other firmware
https://github.com/dj505/GBPrinterEmu
https://github.com/KuestenKeks/pc-to-gb-printer
https://github.com/zenaro147/PicoAdapterGB (Requires PicoW for wireless functionality)
https://github.com/stacksmashing/gb-link-printer

Switch included for switching between GB and GBC/GBA games (Note: GB-Link Zero auto switches voltage so no physical switch needed).

Please note that you will need to provide a gameboy, link cable and usb cable as they are not included. If purchasing the GB-Link Zero DIY kit having a bit of Kapton tape and glue will also be needed.

The GB-Link Zero kit contains the following items
Part Number: Description:
Gameboy-Zero-PCB Cutom PCB board for the RP2040 Zero
BOB-12009 Sparkfun Bi-Directional Logic Level Converter
RP2040-Zero Pi Pico clone with USBC in a smaller footprint
Case parts All 3D printed parts needed to assemble the case
2x 8mm screws To hold the case together

The Pico kit contains the following items
Part Number: Description:
Game-Boy-Pico-Link-Board PCB board
BOB-12009 Sparkfun Bi-Directional Logic Level Converter.
SS12D00-G3 3mm High Knob Vertical Micro Mini Slide Switch (to select voltage)
Pi Pico Either (Pico USB Type-C) or (PicoW with USB Micro-B )

Credit for GBLink Zero to weiman for designing the custom PCB and 3d printable case.
https://hackaday.io/project/195920-game-boy-zero-link
https://github.com/weimanc/game-boy-zero-link-board
https://github.com/weimanc/game-boy-zero-link-case

Credit for Pico PCB design to agtbaskara (Baskara)
https://github.com/agtbaskara

Design based originally on stacksmashing USB to Link cable adapter. Functionality remains the same.

GB-Link Zero DIY Guide:
https://hackaday.io/project/195920-game-boy-zero-link

Pico Soldering guide:
https://www.youtube.com/watch?v=oQMRIQb3pFk