What is it?

PINKY32 is a tiny STM32F030 development board, meant for fast development. And it's fully compatible with Arduino IDE (using stm32duino arduino core). I originally designed this board for a project that requires slow dimming over one minute where arduino's 8bit pwm just doesn't cut it (STM32F030 is capable of 16bit resolution). Dimensions of the board are 18x39.5mm so it's slightly smaller than Arduino Nano.

Thanks to the microUSB connector and onboard CH340 serial-to-usb chip, it supports flashing / debugging via USB just like Arduino. Check out github page for pinout and to see exactly how simple it is to flash it.

PINKY32 is low power. It has low quiescent current LDO onboard, meaning the board only draws few uA in shutdown deep sleep so it is suitable for battery powered projects. Onboard LDO will perform best at 5V but you can feed up to 12V on VIN.

Some details about onboard MCU

STM32F030F4P6 is a value-line 32-bit microcontroller with 16kB Flash, 4kB RAM, hardware I2C and SPI, see datasheet for more details.

Best use cases for PINKY32:

1) Rapid development before final PCB design. Thanks to the integrated CH340 ic, debugging and testing is a breeze.
2) A starting point with STM32 for beginners before stepping up to STM32F3 and others.
3) Simple but low power projects, it takes only few uA in shutdown sleep mode.
4) High resolution PWM, STM32F030F4P6 supports up to 16bit PWM resolution

What you get

• PINKY32 dev board with preloaded Blink sketch
• Two 1x14 headers (not soldered)

Sources

Check out github page for a short Arduino IDE guide as well as schematic and BOM in case you want to make your own!