BOM origins

Component	Brand and Origin
CPU	Microchip Technology Incorporated (USA)
RAM	Micron Technology (USA) , Samsung (South Corea), Hynix (South Corea), Elpida (Japan), Alliance (USA)
PCB	Rayming PCB (China)
Quartz	IEV Industria Elettronica Varese (Italy)
MicroSD holder	JAE (Japan), other vendors (China)
Passive	Yageo, Panasonic, Taiyo Yuden, Samsung, Vishay, Bourns, other vendors (China)
Connectors	Hirose (USA), Wurth Elektronik (Germany), other vendors (China)
WiFi module	Various vendors (China)