The PCB of the gift electronic cup.
Technical specifications:
- Input power supply 5V from USB or from batteries.
- LED matrix controlling through an SPI interface.
- LCD-display.
- 9 RGB leds WS2812.
- Downloding hex audio file through UART interface.
- Main MCU STM32F103C8RT6.
- External EEPROM 256 Kbit M95256 with an SPI interface.
- 12 bit DAC MCP4921.
- Audio amplifier LM386M.
