Introducing TsingTao
TsingTao is a custom mod for those cheap Chinese consoles you can find on the Internet, like the one below:

The goal of this mod is to reuse the following components of this console:
- console shell and lid
- 1020 mAh battery
- power and battery management circuit
- TFT screen
- speaker
This mod runs with a Retro-Go based firmware on a ESP32-based system and is able to correctly emulate ROMS for the following consoles:
- Nintendo NES
- Nintendo GameBoy & GameBoy Color
- SEGA Game Gear
- SEGA Master System
- PC Engine
- Atari Lynx
Required hardware
- 1 cheap Chinese handeld console, like this one
- 1 TsingTao mod kit (PCB + components)
- a soldering iron with enough solder (.5mm diameter recommended)
- desoldering wick
- soldering flux
- a pair of tweezers
- AWG30 monocore wire (or similar)
- .15mil enameled copper wire (very thin silicon-coated monocore wire could also work)
- tiny hot plate for PCB assembly, like this one
- a dremel equiped with a cutting disc, or equivalent