For many years now, the so-called ‘Blue Pill’ STM32 MCU development board has been a staple in the hobbyist community. Finding its origins as an apparent Maple Mini clone, the diminutiv… ...

The YM2151 synthesizer is powered by a STM32 “Blue Pill” board, ... [Aidan] has provided the source code, schematics, Bill of Materials, and KiCad-generated Gerber files; ...