32位arm芯片stm32f103芯片最小系统，采用单面板设计和布置，有原理图和PCB，适合自己手工制作，顶级设计，值得拥有(32 arm chip stm32f103 minimum system chip, single-panel design and layout, schematics and PCB, for their own handmade, top design, worth having)