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NANO Shield For Arduino Nano Overview This is the multi-purpose expansion board for For ARDUINO NANO tailored a sensor expansion board to solve the NANO when connecting a variety of sensor wiring confusing problem, as you develop For ARDUINO works of the weapon. Features IO port leads all digital and analog IO ports, each IO port has positive and negative power supply interface standard Leads to an I2C interface on the motherboard , convenient and I2C devices connected Increasing the DC power connector . NANO USB interface board supply current is actually only 50MA, to bring high-current devices, such as when the steering is obviously insufficient, this time in the DC power supply interface provides external power to ensure the stability of equipment operation.