silverstee1/GC2SD-2.011GC2SD 2.0 Upgrade PCB
GC2SD-2.0 is an open-source printed circuit board by silverstee1, from the silverstee1/GC2SD-2.0 repository on GitHub, published under the Unlicense licence. It is a 2-layer board of 32.2 × 42 mm with 5 parts on 13 nets, routed with 58 tracks and 41 vias.
It is built around the TF-004 and 74AHC1G32GW. Its parts include 2 connectors, 1 resistor, 1 IC and 1 diode.
GC2SD 2.0 Upgrade PCB
Replacement upgrade PCB for GC2SD sold on aliexpress/amazon etc to V2.0 for use on GameCube's Front Memcard Slot B
Based on the SD2SP2 2.0 made by Extrems, Thank you for your hard work!
Important
When using the adapter make sure to have the Latest Version of Swiss, Due to the way Swiss handles it in SLOT A it acts like a normal speed Passive SDGecko, in SLOT B it works in Semi-Passive 2.0 enhanced speed mode.
https://github.com/emukidid/swiss-gc
The PCB must be ordered (e.g. from jlcpcb) in 0.8mm thickness with surface finish ENIG at minimum.
Note
R1,D1 are not necessary if you don't want to have LED in your adapter or want to minimize on components.
GC2SD V2.0 PCB
R1: 0402 470ohm Resistor - Digikey Part# 311-470LRCT-ND (you can use smaller value or larger value depending how bright you want it, 14ohm will be the brightest, I choose 470ohm as its what I had on hand and its not too bright)
LCSC Part# C114877
D1: 0402 Green Led 20ma (Dot on PCB footprint marks LED Cathode side) - Digikey Part# 1516-1216-1-ND
LCSC Part# C2856703
or
0402 Blue Led 20ma (Dot on PCB footprint marks LED Cathode side) - Digikey Part# 1516-1215-1-ND
LCSC Part # C965797
J1: MicroSD Slot - SOFNG TF-004
LCSC Part# C428454
alt LCSC Part# C20624805 , C410348 , C381081
U1: OR Gate IC - DigiKey Part# 296-1093-1-ND
LCSC Part# C7470
Alt Nexperia Digikey Part# 1727-3067-1-ND
LCSC Alt Nexperia Part# C12488
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MicroSD Card Adapter For GameCube's Front Memcard Slots v2.0
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It measures 32.2 × 42 mm and has 2 copper layers, 1.6 mm thick.
5 parts, built around the TF-004 and 74AHC1G32GW. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the silverstee1/GC2SD-2.0 repository on GitHub, at the commit this page was made from: the board is Kicad/GC2SD_2.0/GC2SD_2.0.kicad_pcb and its schematic Kicad/GC2SD_2.0/GC2SD_2.0.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the Unlicense licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).