STM32 Nucleo boards in a small form factor

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Small form factor low end STM32 dev boards.   Like the bigger Nucleo they have a programmer/hardware debugger on board.  Similar size to Arduino Nano etc, but with much higher performance, loads more peripherals, 32 bit processor,  48 Mhz clock etc

http://www.st.com/st-web-ui/static/active/en/resource/technical/document/data_brief/DM00214578.pdf

regards
Andy