Shared Projects by HDR

This board is used in place of a tabbed CR2025 on Game Boy games, the benefit of using this over a tabbed battery is that Chinese tabbed CR cells suck, and Panasonic Tabbed cells are expensive, with these you can use any CR2025 cell you want.

Should be compatible with most if not all GB/GBC games that use Tabbed CR2025 cells

Retainer Part Number: BK-6219-TR

Boards should be ordered with the flex option

Images: https://www.instagram.com/p/CJqJXvsDLt_/

Notes

Bend the tabs on the coin cell retainer so they put less pressure on the board.

Changelog

Revision 2

• Added planes to the top and bottom to stiffen up the board (ironic i know)

Revision 3

• Increased width of the pad, this increases battery cell compatability

Revision 4

• Rounded pad completely

LICENSE

Order at 0.8mm

Replaces the stock charge port with a 6 pin generic USB C port

https://www.aliexpress.com/item/32976798070.html

Github Repository

MBC30 Flashcart for 4MB roms

BOM

Changelog:

1.1:

• Rewired WE on the ROM chip to Pin 31 on the cart bus to fix an issue where it would not write to a bank.

1.2:

• Changed the PCB to fit inside Japanese Pokemon Crystal shells

• Added inverted silkscreen to the board to make it look more like the original

1.3:

• The pinout for the MBC30 listed online is wrong, thanks to Alex over at InsideGadgets for providing a fixed MBC30 pinout.

1.3.1:

• Moved C2 to make it easier to close the shell

1.4:

• Switched cart bus footprint to djedditt’s replica of an original one

• Replaced the flash chip footprint with a TSOP-40 footprint.

• Redid the ground plane by hand, it should now look much better.

• Moved the battery receptacle footprint 0.5mm to the left.

• Renamed Y1 to X1

• Removed JLCJLCJLC marking for OSHPark project.

1.4.1:

• Fixed missing trace for Ram_CS

1.4.2:

• Fixed a symbol kicad “rescued” causing the pinout to be backwards (this put the chip direction indicator in the wrong corner)

Github Repository

MBC30 Flashcart for 4MB roms

BOM

Changelog:

1.1:

• Rewired WE on the ROM chip to Pin 31 on the cart bus to fix an issue where it would not write to a bank.

1.2:

• Changed the PCB to fit inside Japanese Pokemon Crystal shells

• Added inverted silkscreen to the board to make it look more like the original

1.3:

• The pinout for the MBC30 listed online is wrong, thanks to Alex over at InsideGadgets for providing a fixed MBC30 pinout.

1.3.1:

• Moved C2 to make it easier to close the shell

1.4:

• Switched cart bus footprint to djedditt’s replica of an original one

• Replaced the flash chip footprint with a TSOP-40 footprint.

• Redid the ground plane by hand, it should now look much better.

• Moved the battery receptacle footprint 0.5mm to the left.

• Renamed Y1 to X1

• Removed JLCJLCJLC marking for OSHPark project.

1.4.1:

• Fixed missing trace for Ram_CS

1.4.2:

• Fixed a symbol kicad “rescued” causing the pinout to be backwards (this put the chip direction indicator in the wrong corner)

Github

Replace your broken Fire Red / Leaf Green pcb

This is a custom pcb designed specifically to look like an original Cartridge PCB