STM32F103C8T6 Blue Pill Micro-USB - 40-Pin ARM Cortex-M3 Board, 3.3V Logic

The STM32F103C8T6 Development Board (commonly known as the Blue Pill) is a compact, powerful 32-bit microcontroller module based on the ARM Cortex-M3 architecture. It’s a favorite among makers and embedded developers who want more performance and peripherals than basic 8-bit boards, while still keeping projects affordable and easy to build.

With a 40-pin layout, this board provides a generous number of GPIO pins plus common communication interfaces like UART, I2C, SPI, and multiple PWM-capable pins for motor control, LEDs, servos, and timing tasks. The microcontroller runs at 3.3V logic, making it a great match for many modern sensors and modules.

Programming can be done through different methods depending on your setup and board version. Many boards include a Type-MICRO USB port for power and, on some versions, USB communication or easy flashing when configured with the right tools. You can also program using external tools like ST-Link (common in development environments). For Arduino-style development, it supports the Arduino IDE using STM32 board cores, enabling familiar libraries and rapid prototyping.