Parts list for building a single slot Cart Reader (HW Version 4)

Building the Open Source Cartridge Reader will set you back about $80 in parts. The following links are just examples, maybe check if you can get some parts cheaper locally first.

PCBs:

Download the main_pcb_gerber.zip (HW4) the cartridge adapter PCBs you want from here and upload them to a PCB maker
You don't have to change any of the settings but you can select a color you like.
You need at least the main_pcb_gerber.zip (HW4) and one XXX_adapter_gerber.zip for the cartridge slot you want.

Modules:

18650 battery shield V3 https://www.aliexpress.com/item/1005001829483872.html
Mega 2560 Pro (embed) https://www.aliexpress.com/item/1005001621855512.html
MKS MINI12864 V3 LCD https://www.aliexpress.com/item/1005002998072234.html
SI5351 clock generator https://www.aliexpress.com/item/4000040035169.html
(The clock generator is only needed for N64/SNES/NP/SV.)

Female pin headers:

four 1x2 https://www.aliexpress.com/item/1005001418544370.html (includes ten)
three 1x3 https://www.aliexpress.com/item/1005001418544370.html (includes ten)
one 1x7*
two 1x16*
two 1x21*
one 1x36*
one 1x38*
*for these we just buy five 1x40 headers and cut them down to size using a dremel cutting disc(safety glasses!) https://www.aliexpress.com/item/1005001418544370.html (includes ten)

Male pin headers:

ten 1x40 https://www.aliexpress.com/item/32847321530.html, one for the main PCB, two for each cartridge adapter
one 1x40 90° https://www.aliexpress.com/item/32847365702.html (includes ten), for GBx adapter only

At least one Cartridge slot:

50 pin 2.5mm N64 slot https://www.aliexpress.com/item/32871023348.html
62 pin 2.5mm SNES slot https://www.aliexpress.com/item/32914744213.html
GB/GBC/GBA slot https://www.aliexpress.com/item/4000290191316.html
72 pin 2.5mm NES slot https://www.aliexpress.com/item/32827561164.html
64 pin 2.54mm Mega Drive slot https://www.aliexpress.com/item/1005001884522039.html (2x32)
60 pin 2.54mm Famicom slot https://www.aliexpress.com/item/1005001884522039.html (2x30)
50 pin 2.54mm Master System slot https://www.aliexpress.com/item/1005001884522039.html (2x25)

Misc:

N64 controller extension https://www.aliexpress.com/item/32828382501.html
two dupont cables male to female https://www.aliexpress.com/item/1005003007413890.html (includes forty)
a slide switch https://www.aliexpress.com/item/32827322833.html
18650 battery (be sure to buy a high quality one with integrated protection circuit)
SD card (either FAT32 or exFAT formatted)

snesCIC (optional):

For faster SA1 unlocking, SA1 will work without too but then you might need more tries before it unlocks.

PIC12F629 micro controller (SOIC8 SMD)
100nF capacitor (0805 SMD)
suitable PIC programmer

simple 3D printed frame (optional):

lcd adapter PCB
four 2x5 female pin headers
3d printed frame (you can have it printed by JLCPCB for $2)
twelve (self cutting) M2x6 screws

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