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32-Bit ARM Cortex M3 72MHz
64KB Flash
20KB RAM
32 kHz RTC Real Time Clock Crystal
MicroUSB and ST-Link Connectors
STM32F103C8T6 ARM STM32 Minimum System Development Board, commonly referred to as the "Blue Pill" board. Includes two development boards with male pin headers (not soldered) and one ST-Link V2 compatible USB device for programming/debugging. Powerful ARM Cortex MCU Microcontroller chip clocked at 72MHz Can be flashed with an Arduino-compatible bootloader. For details, search for "stm32duino blue pill", also see "stm32duino" and mentions on Hackaday Includes ST-Link V2 programmer (random color and markings - most are gray, blue, brown/gold, or green)