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Diymore 3.3v Expansion Prototype Shield I/o Io Module For Arduino Nano V3.0 3.0 Io Iic I2c Interface Dc Power Supply Pwm - Integrated Circuits - AliExpress
Amazon.com: HiLetgo 3pcs Nano V3.0 ATmega328P CH340G 5V 16M Mini USB Micro Controller Board Development Board with PIN Headers Pin Unsoldered : Electronics