Logitech G913 schematic and modifications (verified)

 A new project group chat has been created. Materials will be uploaded and group purchases will be organized in the group if needed: 907854382.
Updated August 29, 2024: Re-layout v1.5 and prototyped, placing the LED controller next to the main controller. The v1.5 prototype has passed recognition testing. To avoid wasting resources, it is strongly recommended to make a prototype and test it yourself first.

Introduction: This project is a schematic diagram drawn by myself based on reverse engineering of the G913, including a main controller verification board and modified reference routines. I hope everyone can make a keyboard that meets their expectations.
Estimated cost: 80 RMB per board with the main controller, 120 RMB per receiver, and multiple sets of various components can be purchased for under 100 RMB.
Tips: Main controller startup is conditional, peripheral circuit enable conditions are complex, and successful LED controller communication is required for recognition in ghub. Pay attention to the I2C pull-up resistor position and communication lines when drawing the PCB. Verify the current-limiting resistors for the LEDs yourself. The uploaded project is a backup and has some minor issues (such as component packaging). Please feel free to leave feedback in the comments section. I will gradually upload other resources later.
File tree description: The modified example is a three-piece set: main control board + axis board + encoder board, with a special 98-key layout. A CNC shell model is available; please request it from the group. The key layout of the modified example is still being verified; implementation will take a few days. The main control daughterboard is used to adapt the original main control board to a smaller keyboard space, but the packaging is very difficult to solder.