The classic ARM Cortex-M3 minimum system board — 72 MHz, USB-C, genuine ST chip
Every embedded engineer knows this board. The STM32F103C8T6 gives you a real 32-bit ARM Cortex-M3 with rich peripherals: 3 USARTs, 2 SPI, 2 I2C, USB, CAN, 10 ADC channels at 12-bit, and 4 timers — in a breadboard-friendly 53 × 23 mm package. It runs at 72 MHz with 64 KB flash and 20 KB SRAM, has a SWD header for debugging with an ST-LINK, BOOT jumpers for serial flashing, and a user LED on PC13. Program it with STM32CubeIDE, Keil, PlatformIO or the Arduino core. This is the imported-chip version with a genuine ST microcontroller — not a CS32 clone — and a USB-C connector instead of the old micro-USB. Pin headers included.
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