I've been working on a project for quite some time now. The idea was to create a Gameboy Color system similar to the Nintendo Switch, with the following features:
- Ability to play Gameboy games on your TV
- Control the Gameboy with a NES or Bluetooth controller
- Addition of Bluetooth audio and USB-C rechargeable battery to the Gameboy
After several iterations, I managed to create a small PCB board that fits snugly into the Gameboy case with minor modifications. The system comprises two boards; one is implemented inside the Gameboy Color and connected to the controls. The board connected to the LCD controller provides composite TV output, which is routed to the new TRRS jack for audio and video signals.
The dock board, powered by an ESP32 processor, is responsible for controlling the Bluetooth and NES controllers. The button presses from the dock are relayed to the daughter board in the system via I2C protocol. The console then updates itself with the new button presses. The media signal is transferred over the 1/4 inch jack and then routed to an HDMI upscaling device.
The project is now complete, and I have a few working systems. It works very well!
