The STM32F103C8T6 Blue Pill is based on the STM32F103C8T6 microcontroller featuring a 32-bit ARM Cortex-M3 core with 72 MHz clock speed. It offers multiple GPIO pins, PWM outputs, ADC channels, and interfaces including UART, SPI, and I²C. Its compact form factor makes it ideal for breadboard prototyping and embedded applications. The board is compatible with STM32CubeIDE, Arduino IDE (with STM32 core), and PlatformIO, making it accessible for both beginners and advanced developers.

Key Features

ARM Cortex-M3 STM32F103C8T6 microcontroller
72 MHz high-speed processing
20+ GPIO pins with PWM support
ADC 12-bit resolution for sensor integration
Communication interfaces: UART, SPI, I²C
USB interface for programming and debugging
Breadboard-friendly design
Compatible with STM32CubeIDE, Arduino IDE, PlatformIO

Variants

Standard STM32F103C8T6 Blue Pill Board
Blue Pill with onboard USB Mini-B connector

Specifications

Feature	Details
Microcontroller	STM32F103C8T6 (Cortex-M3)
Operating Voltage	3.3V
Input Voltage	5V via USB or external supply
Flash Memory	64 KB
SRAM	20 KB
Digital I/O Pins	20+
ADC	12-bit
Communication Interfaces	UART, SPI, I²C, USB
Clock Speed	72 MHz
Dimensions	52 × 30 × 10 mm

Applications

Robotics and automation projects
IoT and sensor devices
Embedded system prototypes
Motor control and PWM applications
DIY electronics and hobbyist projects

Compatible Boards / Circuits

STM32CubeIDE for STM32 programming
Arduino IDE (with STM32 core)
PlatformIO IDE
Compatible with sensors, relays, motors, and displays