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STM32F103C8T6 CH32F103C8T6 ARM Cortex-M3 Development Board with ST-LINK V2 Programmer

$7.72 USD

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STM32F103C8T6 "Blue Pill" ARM Cortex-M3 Development Board with ST-LINK V2 Programmer

Step into 32-bit embedded development with the STM32F103C8T6 — the legendary "Blue Pill" board that has become the go-to platform for engineers, makers, and students worldwide. Running an ARM Cortex-M3 core at 72MHz with 64KB flash and 20KB SRAM, it delivers real processing power at a fraction of the cost of larger development kits. Paired with the ST-LINK V2 SWD programmer, you get a complete, professional-grade embedded development environment ready to use from day one.

Whether you're building a motor controller, a USB HID device, a CAN bus node, or a precision sensor interface, the STM32F103C8T6 has the peripherals, the speed, and the ecosystem to get it done. This listing also offers higher-performance variants including the STM32F401CCU6 (Cortex-M4 @ 84MHz) and STM32F411CEU6 (Cortex-M4 @ 100MHz) for demanding applications.

Available Variants

STM32F103C6T6 — ARM Cortex-M3 @ 72MHz, 32KB flash, 10KB RAM, entry-level Blue Pill
STM32F103C8T6 — ARM Cortex-M3 @ 72MHz, 64KB flash, 20KB RAM, the classic Blue Pill
CH32F103C8T6 Micro-USB — WCH RISC-V compatible, 64KB flash, Micro-USB interface
CH32F103C8T6 Type-C — WCH RISC-V compatible, 64KB flash, USB-C interface
STM32F401CCU6 — ARM Cortex-M4 @ 84MHz, 256KB flash, 64KB RAM, FPU, DSP
STM32F411CEU6 — ARM Cortex-M4 @ 100MHz, 512KB flash, 128KB RAM, FPU, DSP
ST-LINK V2 — standalone SWD/JTAG programmer and debugger
1 SET STM32F103C8T6 — Blue Pill board + ST-LINK V2 bundle

STM32F103C8T6 Technical Specifications

CPU Core: ARM 32-bit Cortex-M3, up to 72MHz
Flash Memory: 64KB (up to 128KB usable with unlock)
SRAM: 20KB
Supply Voltage: 2.0–3.6V (5V tolerant I/O on most pins)
GPIO Pins: 37 (PA0–PA15, PB0–PB15, PC13–PC15)
Timers: 3 general-purpose 16-bit, 1 advanced-control, 2 watchdog
ADC: 2 × 12-bit, 10 channels, up to 1 MSPS
Communication: 2× SPI, 2× I2C, 3× USART, 1× USB 2.0 FS, 1× CAN 2.0B
DMA: 7-channel DMA controller
Debug Interface: SWD (Serial Wire Debug) + JTAG
Operating Temperature: −40°C to +85°C
Package: LQFP-48, mounted on breadboard-compatible PCB (53 × 23mm)

ST-LINK V2 Programmer Specifications

Supported Interfaces: SWD and JTAG
Compatible Devices: All STM32 and STM8 series microcontrollers
Host Interface: USB 2.0 Full Speed
Target Voltage: 3.3V output for target power
Software: STM32CubeIDE, STM32CubeProgrammer, OpenOCD, PlatformIO

Supported Development Environments

Arduino IDE — via STM32duino board support package (Roger Clark / STMicroelectronics official)
STM32CubeIDE — ST’s official Eclipse-based IDE with HAL and LL library support
PlatformIO — VS Code extension with full STM32 support
MicroPython — official STM32 port available for F103 and F4 series
Keil MDK / IAR EWARM — professional RTOS and bare-metal development
Rust (embedded-hal) — growing ecosystem for safety-critical applications

Peripheral Connectivity

The Blue Pill exposes all key peripherals on 0.1" (2.54mm) pitch headers, making it fully breadboard-compatible. Key pinout highlights:

PA9/PA10 — USART1 TX/RX (also USB D+/D− via PA11/PA12)
PB6/PB7 — I2C1 SCL/SDA
PA5/PA6/PA7 — SPI1 SCK/MISO/MOSI
PA0–PA7 — ADC channels (12-bit, up to 1MSPS)
PB8/PB9 — CAN RX/TX
BOOT0/BOOT1 — bootloader mode selection jumpers

Typical Applications

Motor control (BLDC, stepper, servo) with PWM and encoder input
USB HID devices (keyboard, mouse, gamepad, MIDI controller)
CAN bus nodes for automotive and industrial networks
Precision data acquisition with 12-bit ADC and DMA
RTOS-based embedded systems (FreeRTOS, Zephyr, ChibiOS)
IoT sensor nodes with UART/SPI/I2C sensor integration
Bootloader development and firmware update systems
Embedded systems coursework and university projects

Why Choose STM32 Over Arduino?

The STM32F103C8T6 runs at 72MHz — 4.5× faster than the Arduino Uno — with 4× more flash, hardware floating-point support (on F4 variants), true USB, CAN bus, and DMA. For projects that have outgrown the limitations of 8-bit AVR microcontrollers, the Blue Pill is the natural next step without the cost of a full evaluation board.